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99495 NEW LOW TOXICITY, MULTI-METAL ACTIVE VAPOR PHASE CORROSION INHIBITORS

Picture for 99495 NEW LOW TOXICITY, MULTI-METAL ACTIVE
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Product Number: 51300-99495-SG
ISBN: 99495 1999 CP
Author: D. E. Cole, B. G. Dixon and F. L. Keohan
Industry: Chemical Inhibitors
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Traditional vapor phase corrosion inhibitors (VCIs) were developed for short-term otection of steelI articles. VCIs have been applied for protecting metallic structures between stages of manufacturing, between manufacturing and deployment, and in enclosed service environments. Some of the problems associated with this corrosion inhibiting application include: protecting dissimilar metallic structures, avoiding toxic materials such as nitrite salts and formaldehyde emitting compounds, an the need for longer duration corrosion protection. Several types of organic compounds were derivatized for temporary volatility and formulated to yield materials with sufficient ambient temperature vapor pressure for VCI application. The ability of these new VCIs to prevent vapor phase metallic corrosion w investigated by an accelerated hydrothermal exposure method. Metals investigated included an aluminum aircraft alloy, cold rolled steel, brass and a copper-nickel alloy. Potentiodynamic slow scan electrochemical analysis and SEM were also used to study the surface behavior and corrosion processes for metallic specimens treated with experimental and control VCIs. Several of the new compounds showed significant vapor phase corrosion inhibition on all four metal alloys.
Traditional vapor phase corrosion inhibitors (VCIs) were developed for short-term otection of steelI articles. VCIs have been applied for protecting metallic structures between stages of manufacturing, between manufacturing and deployment, and in enclosed service environments. Some of the problems associated with this corrosion inhibiting application include: protecting dissimilar metallic structures, avoiding toxic materials such as nitrite salts and formaldehyde emitting compounds, an the need for longer duration corrosion protection. Several types of organic compounds were derivatized for temporary volatility and formulated to yield materials with sufficient ambient temperature vapor pressure for VCI application. The ability of these new VCIs to prevent vapor phase metallic corrosion w investigated by an accelerated hydrothermal exposure method. Metals investigated included an aluminum aircraft alloy, cold rolled steel, brass and a copper-nickel alloy. Potentiodynamic slow scan electrochemical analysis and SEM were also used to study the surface behavior and corrosion processes for metallic specimens treated with experimental and control VCIs. Several of the new compounds showed significant vapor phase corrosion inhibition on all four metal alloys.
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