Hempadur Zinc Series
Transcript of Hempadur Zinc Series
HEMPADUR ZINC series 17340, 17360 and 17380Organic zinc epoxy protection
The Hempel Group Head Office
Hempel A/S Lundtoftevej 150DK-2800 Kgs. LyngbyDenmark
Phone: +45 45 93 38 00Fax: +45 45 88 55 18E-mail: [email protected]: [email protected]
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Features BenefitsZinc-rich content Excellent corrosion protection
Low VOC Conforms with regulatory demands
Fast drying High productivity
Easy to apply compared with Uniform painting operationsinorganic zinc primers
Can be applied at low temperatures Wide temperature application window. Sameand can cure down to -10°C/15°F product can be used in different climates all year round
Excellent adhesion to substrate Resistant to impact
Produces hard yet flexible film Resistant to abrasion
Features BenefitsMore surface-tolerant than other Easy applicationzinc epoxy coatings
Greater cohesive strength than High impact resistanceother zinc epoxy coatings
Meets requirements for a zinc-rich Conforms with recognised standardsprimer according to SSPC paint specification no. 20, level 3
Features BenefitsVery fast drying Ideal for online production facilities
Approved as primer according to Documented performance in severely corrosiveNORSOK M-501, rev. 4, system no. 1 environments, offshore and onshore
Meets requirements for a zinc-rich Conforms with recognised standardsprimer according to ISO 12944-5 and SSPC paint specification no. 20, level 2.
General features and benefits of HEMPADUR ZINC range
Specific product features and benefits of HEMPADUR ZINC 17340
Specific product features and benefits of HEMPADUR ZINC 17360
Specific product features and benefits of HEMPADUR ZINC 17380
Features BenefitsCustomised to meet the stringent Provides long-term protection of offshore steelrequirements of the offshore sector structures
Approved as primer according to Documented performance in severely corrosive NORSOK M-501, rev. 4, system no. 1 environments, offshore and onshore
Meets requirements for a zinc-rich Conforms with recognised standardsprimer according to SSPC paint specification no. 20, level 1
“Zinc” about it!The superior performance of zinc-rich coatings stems from the metallic
nature of zinc. These coatings are superior on account of the galvanic
protection they provide. In principle, steel treated with a zinc-rich
coating works like a galvanic cell, where the steel and the zinc become
the electrodes.
Zinc is less noble than steel and therefore acts as an anode, corroding
in place of the steel, and providing galvanic protection in the process.
Zinc also reacts with the oxygen, carbon dioxide and moisture in the
atmosphere to form zinc corrosion products, often referred to as zinc
salt or white rust. This makes the coating practically impermeable
and provides an excellent barrier protection. This is also the reason
that zinc coatings are normally always overcoated with an epoxy/
polyurethane system in order to protect the zinc.
The galvanic protection process also takes effect if the coating is
damaged. In case of minor damage, the coating will repair the spot. If
there is an extensive area of damage, the zinc will prevent rust creep
underneath the surrounding paint film that remains intact.
Optimised formula to match every needThe zinc content in the individual HEMPADUR ZINC products is optimised
to meet particular demands within the heavy-duty construction
industry. The zinc content of HEMPADUR ZINC 17340, HEMPADUR
ZINC 17360 and HEMPADUR ZINC 17380 therefore varies.
HEMPADUR ZINC 17340 is recommended for steel structures exposed
to milder conditions, while HEMPADUR ZINC 17360 and 17380 are
designed to protect steel structures in very aggressive environments.
A series of tests has documented impressive results.
NORSOK M-501 approvedThe performance provided by HEMPADUR ZINC 17360 and 17380
is documented by certification in accordance with NORSOK M-501,
revision 4, for system number 1.
NORSOK testThe cyclic 7-day NORSOK test is repeated for 25 weeks
• 72 hours UV (60°C/140°F) + condensation (50°C/122°F)
• 72 hours salt fog spray
• 24 hours at low temperature (-20°C/-4°F).
Panel with scribe (damage) after 25 weeks of exposure, rust visible in scribe.
Panel after 25 weeks of exposure with paint system removed showing an excellent result with less than 3 mm rust creep.
3 mm
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HEMPADUR ZINC 17340 being applied
to a wind turbine tower after abrasive
blasting. An epoxy/polyurethane system
is then applied to ensure maximum
durability and minimum maintenance.
Large steel objects on land require
superior corrosion protection. HEMPADUR
ZINC 17360, followed by either an epoxy/
polyurethane system or direct overcoating
with a polysiloxane, achieves this.
HEMPADUR ZINC 17380 provides the
best possible protection in highly corrosive
offshore and marine environments.
HEMPADUR ZINC 17380 complies with
the highest NORSOK approval ratings.
How to read the Radargram• The Hempel Radargram mapping tool provides customers with a considerable amount of crucial information about
epoxy coatings in a straightforward, easy-to-understand form. The Radargram displays a range of important quantitative and qualitative product performance criteria.
• The Radargram uses a scale from 0 to 10, with 10 as the highest score. An average score of around 4 should be the minimum for an epoxy coating, unless the product has specially designed features. These are difficult to show in a Radargram, which makes general comparisons between all types of epoxy coatings.
• The Radargram is intended as an overall indication of the characteristics and capabilities of the product. The left side of the Radargram provides an indication of the general performance properties – the main focus for the end-user/ owner. The right side gives an indication of the application properties, which are of prime interest for the applicator.
• A blue Radargram indicates that the product is intended for both submerged and dry areas. A red Radargram indicates that the product is intended for dry areas.
• Read more about the Radargram in the Hempel Epoxy Encyclopaedia, in the Hempel Radargram Illustrator or at www.hempel.com.
Zinc Interlocked with steel = No Corrosion
Galvanic protectionThe Hempel range of zinc epoxy coatings is formulated to provide steel structures
with protection against galvanic corrosion in all atmospheric environments. Such
structures include wind turbines installed inland in dry climates, oil and gas platforms
in offshore environments, as well as superstructures, decks, hatch covers/coamings,
masts, etc. on all types of vessels. Whatever the environment, HEMPADUR ZINC
epoxy coatings ensure durability.
HEMPADUR ZINC 17340, 17360 and 17380 epoxy coatings all have high solids
contents, and comply with the strictest environmental regulations for solvent
emission. Organic zinc epoxy coatings such as the HEMPADUR ZINC range are very
easy to handle and often preferred to the slightly more complicated inorganic zinc
silicate, such as the Hempel GALVOSIL range.
Product descriptionThe Hempel range of zinc epoxy coatings consists of HEMPADUR
ZINC 17340, HEMPADUR ZINC 17360 and HEMPADUR ZINC 17380.
Each of these products is designed to meet specific demands
under different corrosion protection conditions for structures in both
industrial and marine environments. These zinc-rich products cure to
a highly corrosion-resistant and durable coating that provides steel
structures with cathodic protection in any atmospheric environment.
Why zinc?Corrosion is an energy exchange process that is based on electrochemical
reactions. Zinc is applied to provide steel with anodic protection, and
is only effective within the medium pH range of 6.0–9.0. In other
conditions, zinc is broken down by acidic or alkaline constituents.
The correct zinc content in the dry film – i.e. the most suitable product
in the HEMPADUR ZINC 173xx series – is therefore a very important
factor when choosing the right zinc epoxy primer.
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Volume solids (%)
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Volume solids (%)
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Volume solids (%)
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HEMPADUR ZINC 17340
HEMPADUR ZINC 17360
HEMPADUR ZINC 17380
Industrial environmentC3–C4 according to ISO 12944-5.
Typical structures
• Inland wind turbine towers
• Factories, bridges, stadiums, etc.
Low VOC system
HEMPATHANE TOPCOAT 55210 50 micron/2 mils DFT
HEMPADUR MASTIC 45880* 100 micron/4 mils DFT
HEMPADUR ZINC 17340 50 micron/2 mils DFT
Fast-drying system
HEMPATHANE TOPCOAT 55210 50 micron/2 mils DFT
HEMPADUR FAST DRY 15560 100 micron/4 mils DFT
HEMPADUR ZINC 17340 50 micron/2 mils DFT
Industrial environmentC4–C5 according to ISO 12944-5.
Typical structures
Onshore/inland steel structures in industrial environments, such as
• Refineries
• Storage tanks
• Container cranes
Low VOC system
HEMPATHANE TOPCOAT 55210 50 micron/2 mils DFT
HEMPADUR MASTIC 45880* 150 micron/6 mils DFT
HEMPADUR ZINC 17360 40 micron/1.6 mils DFT
Fast-drying system
HEMPATHANE TOPCOAT 55210 50 micron/2 mils DFT
HEMPADUR FAST DRY 15560 140 micron/5.5 mils DFT
HEMPADUR ZINC 17360 50 micron/2 mils DFT
Industrial environmentC5-M according to ISO 12944-5.
Typical structures
• Offshore oil and gas rigs and platforms
• Offshore wind turbines
• Bridges exposed to severely corrosive environments.
Low VOC system
HEMPATHANE TOPCOAT 55210 50 micron/2 mils DFT
HEMPADUR MASTIC 45880* 190 micron/8 mils DFT
HEMPADUR ZINC 17380 80 micron/3 mils DFT
Fast-drying system
HEMPAXANE 55000 100 micron/4 mils DFT
HEMPADUR FAST DRY 15560 140 micron/5.5 mils DFT
HEMPADUR ZINC 17380 80 micron/3 mils DFT
Marine environmentAreas suitable for protection by zinc epoxy coatings
• Hatch covers/coamings
• Main decks
• Cranes/masts/etc.
• Superstructures.
HEMPATHANE TOPCOAT 55210 50 micron/2 mils DFT
HEMPADUR MASTIC 45880* 150 micron/6 mils DFT
HEMPADUR ZINC 173xx 50 micron/2 mils DFT
* or any other high-performing HEMPADUR epoxy product
Applying HEMPADUR ZINC 173xx series
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Zinc content in the dry film
Typical uses and recommended specificationsWhy Zinc?Corrosion is an electrochemical driven process of energy exchange. Zinc is appliedto protect the steel as the anode. Zinc is only effective within the medium pH rangeof 5.5 - 9.5, outside this environment zinc will be broken down by the acidic oralkaline constituents.
The correct zinc content in the dry film is a very important factor when choosing theright zinc epoxy primer, the HEMPADUR ZINC 173xx series is therefore tailor madeto suit all possible environments.
Application of HEMPADUR ZINC 173xx series.
Steel substrate
Zn primer
ElectrolyteZn++ Zn++
OH-
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OH-OH-
OH-
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Zn primer
ElectrolyteZn++ Zn++
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Zinc particle
Zinc “corrosion”Steel
Zinc particle
Zinc “corrosion”
Zinc particle
Zinc “corrosion”Steel
Zinc particleZinc particle
Zinc “corrosion”Zinc “corrosion”Steel
e- e-Steel substrate
Zn++ Zn++
Electrolyte
OH-OH-
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