There has been considerable effort by producers of stainless steel to discover, produce and market stainless steels which are increasingly resistant to chloride pitting and crevice corrosion, the corrosion mechanism limiting the use of stainless steel in seawater. This desired chloride pitting and crevice corrosion resistance, combined with the resistance of stainless steel to general corrosion and erosion while maintaining good formability would provide a desirable material for use in seawater in such mill product forms as plate and tubing fabricated into tanks, condensers and heat exchangers. These fabricated items generally contain large amounts of thin-wall tubing in which the thin wall magnifies the importance of any localized attack (Figure 1).

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