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简单18-9奥氏体不锈钢经敏化处理后在腐蚀介质中会出现晶间腐蚀。虽然,大家认为晶间腐蚀与敏化过程中在晶界上所沉淀出的各种类型的铬碳化合物有关,但是究竟由于析出铬碳化合物后造成晶界铬的贫乏,从而使晶界不耐蚀,还是由于铬碳化合物本身的腐蚀促使晶间腐蚀,却存在着不同的看法。为了防止简单18-9不锈钢的晶间腐蚀,广泛采用含Ti,含Nb或含Ta的18-9不锈钢。Ti,Nb,Ta在钢中的作用被解释为在
Simple 18-9 austenitic stainless steel in the corrosive medium after the sensitized intergranular corrosion occurs. Although it is believed that intergranular corrosion is related to various types of chromium compounds precipitated at the grain boundaries during sensitization, what is the impossibility of chromium in the grain boundary after precipitation of chromium compounds, Erosion, or due to the corrosion of chromium-carbon compounds to promote intergranular corrosion, but there are different views. In order to prevent intergranular corrosion of simple 18-9 stainless steel, 18-9 stainless steel containing Ti, Nb or Ta is widely used. The role of Ti, Nb, Ta in steel is explained as