Surface Coating Operations Metals

7/28/2019 Surface Coating Operations Metals

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METAL SURFACE COATING 1/66 Copyright Training 4 Today 2001 Published by EnviroWin Software LLC.

WELCOME

SURFACE COATINGS - METAL

CUSTOMIZED ENVIRONMENTALTRAINING


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INSTRUCTOR

Insert Instructor Name Here


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Discuss Hazardous Materials Used in Metal Coating andCoating Removal.

Define VOC and Explain How to Calculate VOC Content.

Discuss the Types of Metal Coatings. Discuss Transfer Efficiency.

Give an Overview of Application Technology.

Give an Overview of Coating Removal Technology.

Discuss Logs and Recordkeeping.

Recommend Inspection Items.

Discuss Use of Contractors.

OBJECTIVES


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Understand the Hazardous Materials Used in Metal Coating and

Coating Removal.

Understand VOC and Understand How to Calculate VOC Content.

Be Familiar With the Types of Metal Coatings.

Understand How to Improve Transfer Efficiency.

Understand Some of the New Available Application Technologies.

Understand Some of the New Available Coating RemovalTechnologies.

Be Familiar With Required Logs and Records.

GOALS


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BACKGROUND

In 1998, 61,234 industries reported a total of 7.3 billion

pounds of hazardous chemicals released to the air, land

and water in the United States.

Fugitive Air Emissions, Water Emissions from Poorly

Treated Rinsewater, and Solid Waste Generated from

Coating and Coating Removal Operations can have a

Detrimental Impact on Human Health and theEnvironment.


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Supervisors

Facility Engineers

Maintenance Personnel

Department Managers

Building Occupants

Process Specialists

Environmental and Safety Committees

LEARNERS


7/66METAL SURFACE COATING 7/66 Copyright Training 4 Today 2001 Published by EnviroWin Software LLC.

The goal of this course is to provide supervisors

with the tools needed to help reduce hazardous

waste from metal surface coating operations. It

recommends practical, actions that can be carried

out by facility management, maintenance personnel

and building occupants. It also gives an overview of

new technology in coating application and removal.

The course will help you to integrate good surface

coating management activities into your existing

organization and identify which of your staff have

the necessary skills to carry out those activities.

OVERVIEW



WHAT THIS COURSE DOES NOT DO

The course is not intended to provide specific

equipment recommendations for reducing pollution

at your facility. These specialties required training

beyond the intended scope of this course. Where

this expertise is needed, outside assistance should

be solicited.



FEDERAL LAWS

Clean Water Act addresses wastewater effluentrequirements.

RCRA addresses hazardous waste used in metal

finishing, including minimization

Clean Air Act Amendments address harmful airemissions in coatings

EPAs Toxic Release Inventory (TRI) requires

businesses to disclose toxic materials at facilities



FEDERAL REGULATIONS

Pertinent Regulations:

40 CFR Part E413The Effluent Guidelines andStandards for Electroplating

40 CFR Part 59 National Volatile OrganicCompound Emission Standards for Consumer andCommercial Products



WHY FINISH METALS?

Without metal finishing, products made from metalswould last only a fraction of their present life-span.

Metal finishing alters the surface of metal products.

Industries that use metal finishing in theirmanufacturing processes include:

Automotive Electronics Aerospace

Telecommunications Hardware Jewelry Heavy Equipment Appliances



THE POLLUTION PROBLEM

Of particular importance are those processes that usehighly toxic or carcinogenic ingredients that are difficultto destroy or stabilize and dispose of in anenvironmentally sound manner.

Some of these processes are:

- Cadmium plating.

- Cyanide-based plating, especially zinc, copper, brass,bronze and silver plating.

- Chromium plating and conversion coatings based onhexavalent chromium compounds.

- Lead and lead-in plating.

- Numerous other processes.



HAZARDOUS MATERIALS AND

PROCESSESThe metals finishing industry is concerned with pollutionand wastes generated by all processes but especiallythose generated by the use of four specific materials in

finishing processes:(1) the use of cadmium as a plating material,

(2) the use of chromium as a plating material,

(3) the use of cyanide-based electroplating solutions,

(4) the use of copper/formaldehyde-based electrolesscopper solutions.



CADMIUM

Cadmium is a common plating material that hasproperties superior to other metal coatings in someapplications.

It displays excellent corrosion resistance and isvalued for its natural lubricity or smoothness.

It exhibits good corrosion resistance, and meets thesalt-spray test requirements of the automotive industry.

It can be soldered readily and is toxic to fungus and

mold growth. In the past, numerous militaryspecifications have specified the use of cadmium.

The major cadmium complex used in electroplatingbaths is cadmium cyanide, or Cd(CN-24).



CYANIDE SOLUTIONS

Sodium and potassium cyanide are used inelectroplating bath formulations for the deposition ofcopper, zinc, cadmium, silver, gold, and alloys such asbrass, bronze, and alballoy (copper-tin-zinc).

Electroplating baths may also utilize cyanidecompounds of the metal being plated, such as coppercyanide, potassium gold cyanide, or silver cyanide.

In a well-designed wastewater treatment system,

most cyanides can be destroyed through oxidation. Cyanides used in stripping solutions, especially thosefor stripping nickel, are similarly resistant to oxidationand typically must be disposed of in bulk at a high cost.



COPPER/FORMALDEHYDE

SOLUTIONS Electroless copper deposits are frequently used toapply a conductive base to non-conductive substratessuch as plastics.

A thin copper deposit provides a base for anadditional decorative or functional coating of copper,nickel, etc. One important application is in the coatingof printed circuit boards.

Formaldehyde, a water pollutant and a suspected

carcinogen, is used as the reducing agent in electrolesscopper baths. Caustic mists resulting from hydrogenevolution and air sparging in the baths present anadditional hazard.



CHROMIUM

Decorative chromium plating is almost always appliedover a bright nickel plated deposit, which in turn can beeasily deposited on steel, aluminum, plastic, copperalloys, and zinc die castings. Functional chromium plating is normally not appliedover bright nickel plating, although in some cases,nickel or other deposits are applied first to enhancecorrosion resistance. The main ingredient in all hexavalent chromium

plating solutions is chromium trioxide (CrO3). Hexavalent chromium has been linked to cancer inhumans following prolonged inhalation, and is toxic toaquatic life at relatively low concentrations.



WASTEWATER GUIDELINES

The Effluent Guidelines and Standards for MetalFinishing (40 CFR Part 433) are applicable towastewater generated by any of these operations:

Electroplating

Electroless Plating

Anodizing

Coating

Chemical Etching and Milling Printed Circuit Board Manufacturing.

Discharges from 40 additional processes, including:painting, cleaning, polishing, shearing, hot dip coating,solvent degreasing etc.



WASTEWATER GUIDELINES

Chemicals to be monitored include:

Cadmium

Chromium

Copper

Silver

Zinc

Cyanide

Total Toxic Organics (TTOs)

Oil and Grease

TSS

pH



WASTE HANDLING

Physical processes such as abrasiveblasting, grinding, buffing, and polishing do notcontribute as much to hazardous wastegeneration as chemical and electrochemicalprocesses.

The most common hazardous waste sourcesare rinse water effluent and spent processbaths. These systems in turn generate solidand liquid wastes that are regulated under theprovisions of RCRA.



AIR EMISSIONS

The air emissions from many metalfinishing processes must be controlledusing scrubbing or filtering equipment.

These can generate further wastesthat must also be treated, disposed, orrecycled.

Some of the processing solutions

used in metal finishing have a finite life,especially conversion coating solutions,acid dips, cleaners and electrolessplating baths.



VOLATILE ORGANIC

COMPOUNDS (VOCs) Organic solvents, known as Volatile OrganicCompounds (VOCs) are used in coatings such as paint,strippers/cleaners, etc.

In the presence of sunlight, VOCs react in a complexreaction that produces ozone. Ozone is the majoringredient in photochemical smog.

By reducing the amount of VOC in coatings, in

combination with other efforts to reduce VOCemissions, you can help reduce ozone.

Most air districts restrict the amount of VOCemissions allowed.


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VOC CONTENT

Coatings consist of solids (resin, pigments, extenders,additives) and solvents. Solvents lower the viscosity(reduce or thin), and act as the carrier for the solids.

Solvents also are used to dissolve the solid resin.Solvents evaporate from the coating before, during andafter application.

Solvents include VOCs, water, and exempt solvents.VOC content means pounds of VOCs per gallon of

coating (lb/gal) or grams of VOCs per liter of coating(G/L), minus water and exempt solvents (exempt solventsdo not contain volatile organic compounds).


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VOC CONTENT

The VOC concentration does not change if youincrease the volume of mixed paint used, however, theVOC concentration does increase when adding VOC

solvents such as thinners or reducers.

Manufacturers are currently being required by federalregulations to formulate paint to certain VOCspecifications, that when used, according to the

manufacturers recommendations, will meet VOCcontent limits. The VOC content is generally stated onthe label or on the manufacturers paint specificationsheet.


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CALCULATING VOC CONTENT

Information is from a Material Safety Data Sheet for thiscoating:

If the coating weighs 10.4 pounds/gallon, and it

contains the following VOCs:

Xylene 2% x 10.4 lb/gal = .21 lb/gal

Toulene 2% x 10.4 lb/gal = .21 lb/gal

MEK 6% x 10.4 lb/gal = .63 lb/gal

Mixed Aliphatics 10% x 10.4 lb/gal = 1.04 lb/gal

TOTAL 20% x 10.4 lb/gal = 2.09 lb/gal

2.09 lb/gal x 119.8 (g/L) (gal/lb) = 250 grams/Liter


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TYPES OF COATINGS

Water Borne - Water is the major solvent andincludes water reducible and emulsions. These coatingsusually include VOCs as co-solvents.

UV Curable Coating - Liquid resin and pigment whichuses UV light to cure the coating.

High Solids - Coatings that contain greater thannormal resin and pigment (70 - 80% by volume).

Powder - Dry finely ground coating which is usuallysprayed dry on an electrically charged surface and islater heated to its melting point so that the powder canflow together (3% VOCs by volume).


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TYPES OF COATINGS

Exempt Solvent based - Coatings that containexempt solvents, primarily 1,1,1 TCA. These coatingsusually include VOC as stabilizers and co-solvents.

Electrodeposition - Dip coating process where waterborne coatings are electrically "plated-out".

Autodeposition - Dipcoat plating process withoutelectrical charge.

Catalyzed Coatings - Two or three componentcoatings which are mixed together prior to application.


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PHOTOCHEMICALLY REACTIVE

A photochemcially reactive is any solvent with anaggregate of more than 20% of its total volumecomposed of chemical compounds classified below:

a. A combination of hydrocarbons, alcohols,aldehydes, esters, ethers, or ketones having anolefinic or cycle- olefinic type of unsaturation: 5%.b. A combination of aromatic compounds with eightor more carbon atoms to the molecule except

ethylbenzene: 8%.c. A combination of ethylbenzene, ketones havingbranched hydrocarbon structures, trichloroethylene ortoluene: 20%.


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TRANSFER METHODS

Coatings and agents containing high VOCconcentrations can be applied using the following hightransfer efficiency methods:

High-Volume, Low-Pressure coating system

Electrostatic application

Flow coat application

Dip coat application

Brush coat application

Pre-packaged aerosol can application

Roll coat application


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SPRAY BOOTH FILTERS

Spray booth filters prevent paint overspray from traveling upthe exhaust vent.

Filters help increase the life span of the exhaust fans, reducefire hazard, and provide protection from the deposition of paint

particles outside the building. It is important to maintain your booth to ensure that youroperation does not cause a public nuisance and violate airregulations.

Paint overspray can travel through ineffective filters anddamage the finish of automobiles and structures near youroperation. Always make sure that the filters are installedproperly and cover all openings. Remember that the filter mediayou use must be designed for your type of spray operations.


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SPRAY BOOTH FILTER

PRESSURE A pressure drop gauge may beused to determine the pressuredrop across the spray boothfilters.

As the filter pores becomeclogged, the pressure dropincreases.

Filters should be replaced

according to manufacturersrecommendations.

Check your pressure gaugefrequently for accuracy.


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KEEP YOUR CURTAIN WET

Waterwash booths should provide a continuous sheetof water down the face of the rear booth panel.

The water sheeting collects the overspray from the

painting operation and the particulates can be skimmedfrom the surface of the water for disposal. If the boothdoes not provide a continuous sheet of water, i.e. if dryspots appear, the water spray lines should be checkedfor clogged openings. Remove the booth from service

and repair the water lines immediately.

Never discharge your wastewater to the ground orstorm drain system.


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TRANSFER EFFICIENCY

Transfer efficiency is the percentage of paint solidsdeposited on the surface of your product. The costsavings in paint consumption when using high transfer

efficiency guns is significant. If you achieve 30% transfer efficiency, then 30% ofthe paint solids sprayed have adhered to the product,and 70% of the paint solids are on your floor, boothwalls, and exhaust filters.

You can get more paint to stay on the product if youuse application methods with transfer efficiencies inexcess of 65%, and you buy less paint.


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WASTING PAINT

High transfer efficiency saves paint and decreasesemissions, thus lowering your costs.

High transfer efficiency decreases your booth filter

purchases, decreases your booth cleaning expenses,and may decrease your waste disposal costs.

Train your painters to maximize their efficiency.

Consider racking parts to make overspray land on apart.

Make sure automatic spray lines spray the parts andnot empty hooks.

Spray corners of parts first so overspray hitsuncoated areas of the part.


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OPERATING EQUIPMENT

PROPERLY Use properly designed equipment

Eliminate cross drafts

Reduce air pressure in gun

Allow dipped parts to drain

Only spray the part

For electrostatic painting

- turn on power to electrostatic- keep a good clean ground- hook up the grounding strap


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STORING

Tightly seal all containers of coatings and solvents.Cans and drums should be equipped with tight fittinglids and should remain closed between uses to preventevaporation.

Large drums should have screw caps to cover thebung holes and should be opened only to empty or fillthe drum. Use a pump or funnel when filling and makesure to close the drum completely when you arefinished.

Use new funnels that screw into the bung of drumsand have a lid that clamps down on top of the funnel fora tight seal.


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SURFACE PREPARATION

Preparing a surface may entailusing a solvent degreaser.

Alternatives to solvent

degreasing include usingabrasives, water with surfactants,exempt solvents, alkaline washes,or acid etches.

Switching from solvent cleanersto other surface preparationmethods can save money andreduce disposal costs.


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FOLLOW MIXING DIRECTIONS

Mixing Directions

Coating manufacturers willsupply you with instructions

when the coating containsmore than one component.

Often the coatings must bemixed with a thinner and acatalyst.

Always mix according to theinstructions.


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CLEANING UP

VOCs from your facility can be reduced significantlyby cleaning your spray guns and other equipmentproperly.

Never clean your lines by spraying solvents into theair or into the filters.

Always direct the clean-up solvents, using minimalpressure, into containers to prevent evaporation.Remove atomization tips, soak and/or use a brush toclean the tip, then flush solvent through the gun (withoutthe tip) into a container which is immediately sealed.

Soak spray guns in closed containers and avoid theuse of VOCs for clean-up whenever possible.


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LOGS

Keep detailed records of the coatings applied at yourfacility. Monthly logs should detail the productspurchased, including the name and number of the

product, and the amount of product purchased, with theappropriate unit indicated (i.e., gallon, quart, pint).Remember that inspectors look for accurate records.

One proven method of record keeping involves theuse of job tickets and a summary log. Many facilities

instruct the operator to record coating information foreach job on a production ticket at the booth. The jobtickets are then summarized nightly by the supervisor.


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APPLICATION TECHNOLOGY

Non-Cyanide Copper Plating

Non-cyanide copper plating is an electrolytic processsimilar to its cyanide-based counterpart.

Operating costs for the bath itself are higher for thenon-cyanide process than the cyanide process.

Non-cyanide copper plating benefits:

Greatly reduces safety risks to workers.

Greatly reduces the costs and complexity of treatingspent plating solutions.

Smaller risk to hydrogen cyanide exposure.

Plating solution does not have to be treated forcarbonates.


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Zinc-Alloy Electroplating

Both zinc and zinc-alloy electroplating processes are verycommon and have a long history in the electroplating industry.

Recently these processes have been considered as possiblereplacements for cadmium coatings.

Benefits of zinc and zinc-alloy

Eliminates workplace exposure to cadmium and cyanide.

Corrosion resistance as good as cadmium.

Better wear resistance than cadmium. Zinc-cobalt deposits show good resistance to atmospherescontaining SO2.


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The Blackhole Technology

Uses an aqueous carbon black dispersion at room temperaturefor preparing through-holes in printed wire boards for subsequentcopper in the through-holes.

Benefits of Blackhole Technology Process Simplification - requires fewer process steps as well asassociated chemicals and rinses.

Contamination Reduction - does not use formaldehyde. Ease of Implementation - uses existing equipment in an

electroless copper process line. Acceptable Product Quality - accepted under MIL-P-5511OD. Lower Operating Costs


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Ion Vapor Deposition of Aluminum (IVD)

In IVD, the coating metal is evaporated and partially ionizedbefore being deposited on the substrate. A typical IVD system

consists of a steel vacuum chamber, a pumping system, a partsholder, an evaporation source, and a high-voltage power supply.

Benefits of this technology

Health and safety risks can be greatly reduced when IVD is usedin place of cadmium electroplating.

The greatest advantage of aluminum IVD is that the processsignificantly reduces the generation of hazardous wastes, andpotentially eliminates the need for special pollution control systems.


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Physical Vapor Deposition (PVD)

A thoroughly cleaned workpiece is placed in a vacuumchamber, and a very high vacuum is drawn. The chamber isheated to between 400o and 900o F. A plasma is created from an

inert gas such as argon. The workpiece is first plasma-etched tofurther clean the surface. The coating metal is then forced into thegas phase by either evaporation, sputtering or ion plating.

Benefits of PVD

PVD results in a thin, uniform coating that is much less likely to

require machining after application. PVD titanium nitride coatings have already gained wideacceptance in the cutting tool industry.


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Chromium-free Surface Treatments for Aluminumand Zinc

Chromium-free surface treatments for aluminum and

zinc are relatively new. One of the few commercially proven, non-chromatesurface treatments for aluminum is an inorganicconversion coating based on zirconium oxide.

A recent chrome-free post-rinse process has been

developed for use on phosphated steel, zinc, andaluminum surfaces prior to painting. The new rinse,known as Gardolene VP 4683, contains neitherhexavalent or trivalent chrome. It contains onlyinorganic metallic compounds as the active ingredient.


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Metal Spray Coating

Molten Metal -The metal is heated by some suitable means(either resistance heating or a burner) and then supplied to theatomizing source in molten form.

Fuel/Oxidant - Oxygen/acetylene flames are typically used.The metal melts as it is continuously fed to the flame in the formof a wire or powder.

Electric arc - In this method an electric arc is maintainedbetween two wires that are continuously fed as they melt at thearc.

These technologies for thermal spraying of metals are welldeveloped, but they tend to have their own market niche andare not typically thought of as a replacement for electroplating.


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COATING REMOVAL

TECHNOLOGYNon-Cyanide Metal Stripping

Many non-cyanide stripping solutions are typicallyproprietary formulations, the detailed chemistry of coating

removal is not known for most solutions. Non-cyanide metal strippers have the following benefits:

Significant potential for reducing waste treatment costs.

Often easier to recover metals from spent solutions.

Bath life is longer because higher metal concentrationscan be tolerated.


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COATING REMOVAL

TECHNOLOGY

Plastic Media Blasting (PMB)

PMB uses low-pressure air or centrifugal wheels to projectplastic media at a surface. The blast particles have sufficientimpact energy, coupled with hardness and geometry to chip

away or erode the coating. Some of the major beneficial aspects of PMB include: High stripping rate Eliminates water use Can selectively remove individual coating layers

Often done with recyclable thermoplastic media Fully automated robotic systems available Fully developed systems available No size limitations on parts to be stripped.


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COATING REMOVAL

TECHNOLOGY

Wheat Starch Blasting

Wheat starch blasting uses low-pressure air to propelparticles at the painted surface. The coating is strippedaway by a combination of impact and abrasion. Similarequipment and techniques to PMB.

Some of the major benefits include:Moderate stripping rates can be achieved whilemaintaining a gentle stripping action.

Safe on soft clad aluminum and compositesEliminates water useCan selectively remove individual coating layersUses inexpensive stripping mediaMedia are nontoxic and biodegradable


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COATING REMOVAL

TECHNOLOGYBurnoff Coating Removal

Burnoff systems use temperatures of 370oC (700o F) orhigher to volatilize and/or burn the organic coating material.Inorganic materials such as pigments remaining on the

substrate must be removed by mechanical cleaning such aslow-energy shot blast, manual cleaning, or water rinse.

Some of the major beneficial aspects include:Allows rapid removal of heavy coating accumulation with aminimum of handling.

Can process parts with complex shapes.Direct-burn ovens can removal wet, uncured coatings.Large ovens are available to process large items, but themaximum size is limited by the oven size.


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COATING REMOVAL

TECHNOLOGY

Molten Salt Coating Removal

The molten salt stripping process relies on chemicaloxidation of the coating by a specially formulated moltensalt bath. The process uses mixtures of inorganic saltsformulated to react with the coating materials.

Some of the benefits include:

Allows rapid removal of heavy coating accumulation

Provides rapid, well-controlled, uniform heating.

Wastewater stream is compatible with conventionalwastewater treatment plants.

Salt baths are available to process moderate sizeditems, but the maximum size is limited by the bath size.


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COATING REMOVAL

TECHNOLOGY

Sodium Bicarbonate Wet Blasting

Compressed air moves the sodium bicarbonate mediumfrom a pressure pot to a nozzle where the medium mixeswith a stream of water. The blast medium/water mixture,

accelerated to several hundred miles per hour, impacts thecoated surface and shatters into a very fine particulate.

Benefits include: High stripping rate Can selectively remove individual coating layers

Can reduce prewashing and masking of the surface Water dissipates the heat generated by abrasive processand reduces the amount of dust in the air. No size limitations on the parts to be stripped.


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COATING REMOVAL

TECHNOLOGY

Carbon Dioxide (CO2) Pellet Cryogenic Blasting

The carbon dioxide blasting systems have a refrigeratedliquid CO2 supply and a system for converting the liquid to

the solid media used in coating removal. Similar to PMB. Benefits of CO2 Pellet Cyrogenic Blasting include:

CO2 media vaporizes

Eliminates water use

Has a clean and well-defined coating removal pattern

Can selectively remove individual coating layers Stripping cleanup requirements typically are minimal

Equipment can be stripped without requiring disassembly


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COATING REMOVAL

TECHNOLOGY

High Pressure Water Blasting

High-pressure waterjet stripping removes coating with astream of water projected from specially designed nozzles at

pressures of 15,000 psi to 30,000 psi or more.The coating isremoved by the kinetic impact of the water stream.

Benefits of high pressure water blasting include:

The technology has a high stripping rate.

Stripping water is recycled.

Wastewater stream is compatible with conventionalwastewater treatment plants.

There are no size limitations on parts to be stripped.


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COATING REMOVAL

TECHNOLOGYMedium Pressure Water Blasting

Medium-pressure water blasting removes coatings with astream of water projected from specially designed nozzles atpressures of 3,000 psi to 15,000 psi. The stripping action

often is supplemented by pre-softening with an alcoholsolvent or by including soft or hard abrasives in the waterstream.

Some of the benefits include: Low implementation cost using simple, robust equipment

High stripping rates Wastewater stream is compatible with conventionalwastewater treatment plants available No size limitations on parts to be stripped


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COATING REMOVAL

TECHNOLOGY

Liquid Nitrogen Cryogenic Blasting

The part to be stripped is cooled by a readily availablecryogenic fluid, liquid nitrogen. Nitrogen is inert, colorless,odorless, noncorrosive, and noncombustible. Liquid nitrogen

is sprayed on items to be stripped as they rotate on a spindlewithin a stainless steel cryogenic chamber. Tensile stressesthus develop within the coating and make it brittle.

Benefits of this method include: No ash residue

Low waste volume Very fast cycle time (5 to 15 min) High throughput rate Works well on thick coating buildups.


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RECORDKEEPING

Accurate recordkeeping helps to ensure that youoperate in daily compliance.

Daily recordkeeping has several other advantages aswell. Your records tell you how much paint you useeach day. You will have an accurate record ofproduction expenses which can enable you to cut costs.

If you have an approved Notice of Construction, itmay include a limitation on annual coating usage. Donot paint more than you are allowed. Modify yourproduction schedule to avoid penalties. Be careful withmultiple shifts. If you cannot modify your dailyproduction, contact your air district.


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SELF- INSPECTIONS

1. If your facility coats light duty automobiles, do the coatingsused have the appropriate/compliant VOC levels?

___Yes ___No ___NA

2. Does your facility only apply coatings with less than 0.1% leadand hexavalent chromium? ___Yes ___No ___NA

3. If you coatings contain more than 2.1 Lb/Gal or 250 G/L VOC,do you only use approved application methods as outlined inyour air districts regulations (i.e. HVLP gun)?

___Yes ___No ___NA


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SELF- INSPECTIONS

4. Does all surface coating take place in a booth or room equippedwith a particulate control system capable of capturing all visibleoverspray? ___Yes ___No ___NA

5. Does your paint booth or room exhaust through an unobstructed

vertical stack (no caps, elbows, etc.)? ___Yes ___No ___NA

6. Is your spray gun totally enclosed during clean-up, or is solventflushed through the gun into a container which is immediatelysealed? ___Yes ___No ___NA

7. Are all coating and solvent containers tightly sealed when not inuse? ___Yes ___No ___NA


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SELF- INSPECTIONS

8. Are all solvent containing wastes stored in tightly sealedcontainers until disposal? ___Yes ___No ___NA

9. Are solvent rags kept in tightly sealed containers when not inuse? ___Yes ___No ___NA

10. Are spills of solvent containing material cleaned up upondiscovery? ___Yes ___No ___NA

11. Are the most current MSDS kept for materials used, and arethey available upon request? ___Yes ___No ___NA

12. Are records of purchases/usages and waste disposal kept forthe previous 24 months of operations and available on site?

___Yes ___No ___NA


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SELF- INSPECTIONS

13. Are fugitive emissions from prep work controlled?

___Yes ___No ___NA

14. Are you properly operating your pressure drop gauge (i.e., is it

checked to insure that it is zeroed before the booth is turned on)?___Yes ___No ___NA

15. Are filters seated in filter housing such that there are no gapsbetween the filter and the housing?

___Yes ___No ___NA

16. If you operate a water wash booth, is the water levelmaintained to adequately filter exhaust air?

___Yes ___No ___NA


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SELF- INSPECTIONS

17. If you operate a water wash booth, is the water curaincontinuous all the way across the booth wall with no flowinconsistencies or gaps? ___Yes ___No ___NA

18. Are visible emissions and overspray NOT observed fromthe exhaust stack? ___Yes ___No ___NA

19. Are you performing pressure drop readings, filterchanges, visual observations of filter media condition, andother manufacturer-recommended booth maintenance?

___Yes ___No ___NA

20. Are all maintenance activities recorded on a maintenancelog? ___Yes ___No ___NA


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Remember,You Control Your Facility or Area!

Review Procedures With Them Before Starting the Job!

Ensure They Are Properly Trained!

Determine Their Environmental Compliance Record!

Determine Who Is in Charge of Their People!

Determine How They Will Affect Your Facilitys

Environmental Compliance!

TIPS FOR USING CONTRACTORS


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ELEMENTS OF A SUCCESSFULMETAL SURFACE COATING PROGRAM

1. DETAILED WRITTEN METAL SURFACE COATING

INSPECTION GUIDELINES.

2. DETAILED WRITTEN METAL SURFACE COATING BEST

MANAGEMENT PRACTICES.

3. EXTENSIVE EMPLOYEE TRAINING PROGRAMS

4. PERIODIC REINFORCEMENT OF TRAINING

5. SUFFICIENT DISCIPLINE REGARDING IMPLEMENTATION

6. PERIODIC FOLLOW-UP


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THE IMPORTANCE OF A

CLEAN ENVIRONMENT

I would ask all of us to remember

that protecting our environment is

about protecting where we live and

how we live. Let us join together to

protect our health, our economy,

and our communities -- so all of us

and our children and our

grandchildren can enjoy a healthyand a prosperous life.

Carol Browner

Former EPAAdministrator

Surface Coating Operations Metals

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