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Users are now beginning to specify low amounts (typically <30ppm) of free chloride in the coatings to be applied to stainless steel.This paper details the development of a method that clearly identifies a reproducible level of leachable chloride present in coatings.
Chloride Induced Stress Corrosion Cracking (CISCC) is, arguably, one of the most prominent causes of failure of stainless steel structures. It is a well known fact that some coatings can leach significant amounts of chloride which can lead to a “micro-environment”, between the underlying substrate and the coating, promoting such corrosion. This has become such an issue over recent years that end users are now beginning to specify low amounts (typically <30ppm) of free chloride in the coatings to be applied to stainless steel. This paper details the development of a method that clearly identifies a reproducible level of leachable chloride present in coatings.
Keywords: Stainless Steel, Chloride Induced Stress Corrosion Cracking (CISCC), Leachable Chloride, Coating
Electrochemical and slow strain rate tests were done to demonstrate the protective ability of a thermal sprayed aluminum coating to prevent chloride stress corrosion cracking of TP304L SS in aqueous chloride solutions. Mitigation methods.
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