Effect of impurities in dissimilar metal welds on their corrosion behavior,Materials and Corrosion

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Effect of impurities in dissimilar metal welds on their corrosion behavior
Materials and Corrosion ( IF 1.6 ) Pub Date : 2021-03-11 , DOI: 10.1002/maco.202112282
Václav Bystrianský ₁ , Jaroslav Bystrianský ₂ , Karolina Dumská ₁ , Jan Macák ₁ , Aleš Návoj ₃

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Dissimilar metal welds are commonly used constructional solutions in most light-water reactors. Unfortunately, it may also be a source of operational problems due to the combination of two or more metals with different corrosion resistance. For welds of carbon and austenitic steel, it is possible to observe damage in the austenitic steel, which is the material with better corrosion resistance. This self-contradictory phenomenon is presumed to be caused by the segregation of impurities (S, P, C) from carbon steel on austenitic grain boundaries. The goal of this study is to demonstrate the effect of these impurities on the corrosion behavior of Fe–Cr–Ni alloys with different Cr and Ni content by using electrochemical methods.

中文翻译：

异种金属焊缝中杂质对其腐蚀行为的影响

异种金属焊接是大多数轻水反应堆中常用的结构解决方案。不幸的是，由于两种或多种具有不同耐腐蚀性的金属的组合，它也可能成为操作问题的根源。对于碳钢和奥氏体钢的焊缝，可以观察到奥氏体钢的损伤，这是一种耐腐蚀性更好的材料。这种自相矛盾的现象被推测是由杂质（S、P、C）在奥氏体晶界上从碳钢中偏析引起的。本研究的目的是通过电化学方法证明这些杂质对不同 Cr 和 Ni 含量的 Fe-Cr-Ni 合金腐蚀行为的影响。

更新日期：2021-03-11

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