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不锈钢主要用于含氯化物的环境中。限制合金对这种环境适用性的决定性因素往往是其耐间隙腐蚀性。本研究旨在详细考察微量元素对各种不锈钢[包括从316型(UNS S31600)合金到6％钼奥氏体不锈钢(SS)]耐裂隙腐蚀性能的影响,以确定适用于海水环境的某种合金成分。为此,采用加速试验技术对8种商品不锈钢和31种试验性高纯度合金在海水环境中耐裂隙腐蚀性能进行了评定。总的说来,评定结果表明显著改进高-合金奥氏体不锈钢耐腐蚀性使其达到适于在海水环境中使用是可行的。
Stainless steel is mainly used in chloride-containing environment. The decisive factor that limits the suitability of an alloy to this environment is often its resistance to crevice corrosion. The purpose of this study was to examine in detail the effect of trace elements on the crevice corrosion resistance of various stainless steels [including UNS S31600] and 6% molybdenum austenitic stainless steels (SS) to determine the appropriate alloy composition. To this end, the accelerated test technique was used to assess the crevice corrosion resistance of 8 commercial stainless steels and 31 experimental high purity alloys in seawater environment. Overall, the rating results indicate that it is feasible to significantly improve the corrosion resistance of high-alloy austenitic stainless steels to make them suitable for use in marine environments.