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  • Innovative Product Development

    VCI TECHNOLOGY APPLICATIONS

    Terry Natale, Product Development Engineer Northern Technologies International Corporation TNATALE@NTIC.COM (216) 450 -5719 September 21, 2012

    Corrosion Forum 2012

  • Northern Technologies International Corporation (NTIC)

    NTIC is a global provider of corrosion inhibiting products

    The initial patent in 1980, for a Volatile Corrosion Inhibiting Article, utilizes the application of

    Volatile Corrosion Inhibitors (VCI)

    The majority of NTIC business is based around the application of VCI technologies

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  • VOLATILE CORROSION INHIBITORS (VCI)

    The unique aspect of a VCI is its delivery mechanism

    A VCI in its natural state can be a solid, liquid or gas

    For solid or liquid VCIs, a small amount of the VCI also exists in a gaseous state. How much is determined by each compounds Vapor Pressure

    Once in the vapor state, VCI disperses through the airspace

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  • VCI ACTION

    To be effective, the VCI must be applied in an enclosed space, or it is simply lost to the atmosphere

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    From the airspace, the VCI will reach and adsorb onto metallic surfaces, where they will work like typical corrosion inhibitors

  • NACE 2012 Materials Performance Innovation Awards

    Zerust Flange Saver

    Zerust ReCASTR Corrosion Protection for

    Aboveground Storage Tank Roof Interiors

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  • Zerust Flange Saver

    Flanged Joints are used across a wide variety of industries and are subject to corrosion, especially in aggressive environments.

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  • Flange Savers

    Are an extension of NTICs traditional VCI film (PE film with VCI compounded into the film)

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    The FS is used to create an enclosure around the flanged joint which:

    Reduces exposure to the outside environment

    Provides a delivery system for VCI into the enclosure to protect the enclosed metals

  • FS film can be cut to fit a wide variety of shapes

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  • Singapore Terminal

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    FIELD TESTING RESULTS

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    Russian Water Treatment Plant

    FIELD TESTING RESULTS

  • FLANGE SAVER BENEFITS

    Reduce maintenance time and costs

    Inexpensive, rugged, durable protection

    Quick and easy to install

    Installation requires no special equipment or training

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  • Corrosion Protection of Aboveground Storage Tank (AST) Roof Interiors

    Corrosion can be a significant problem in AST vapor spaces

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    Zerust ReCAST-R

  • Corrosion is often more severe in crude oil tanks, with typically very aggressive vapor

    space environments, including:

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    Sulfur compounds (H2S, SO2, Mercaptans)

    Chlorides

    CO2

    High Relative Humidity

    High Temperatures (up to 80C)

    For tank vapor space surfaces, coatings generally are ineffective

    Unable to coat all surfaces

    Highly dependent on surface preparation and operator application skill

    Coating failures will contaminate stored product

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    Zerust ReCAST-R System

    Corrosion protection is provided by VCI delivered into the AST vapor space via dispensers installed on the AST roof

  • FIELD INSTALLATION

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    Petrobras Refinery - Brazil

  • Data collected during the trial demonstrated that corrosive species in the test tank (with inhibitor) generated a more aggressive environment than that in the control tank

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    ENVIRONMENTAL CONDITIONS

    Testing Parameters Monitoring Results

    Control Tank Test Tank

    Concentration

    O2 (%) 18 10

    SO2 (ppm) 7.0 >20

    H2S (ppm) 3.0 26

    Temperature Range (C) 25 to 55

    Relative Humidity Range (%) 40 to 85

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    FIELD TRIAL RESULTS

    *

    * Calculated from ultrasonic thickness measurements

    Even with the more aggressive environment, there was

    ~4X reduction in corrosion rate

  • Petrobras, Brazil

    Zerust Corrosion Prevention SA, Brazil

    Zerust NIC, Taiwan

    Zerust Singapore

    Lenprom Technologies, Russia

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    CONTRIBUTORS

  • THANK YOU

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