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针对发酵法生产衣康酸过程中的腐蚀问题研究了两种不锈钢在衣康酸工况介质（发酵液）中的腐蚀行为，探讨了介质中杂质离子Ｃｌ－、Ｆｅ３＋、ＳＯ２－４等对腐蚀的影响。结果表明，随衣康酸介质中Ｃｌ－含量增加，不锈钢的腐蚀速率也增大，而其点蚀电位则随Ｃｌ－浓度的对数值增加呈线性下降；Ｆｅ３＋浓度的增大可使不锈钢／发酵液由活化体系转变成活化钝化体系；ＳＯ２－４对不锈钢稍有缓蚀作用；在含杂质的衣康酸介质中，Ｒ１双相不锈钢的耐全面腐蚀和耐点蚀性显著优于３１６Ｌ奥氏体不锈钢。
The corrosion behavior of two kinds of stainless steel in itaconic acid medium (fermentation broth) was studied in this paper. The corrosion behavior of the two kinds of stainless steel in the medium (fermentation broth) of itaconic acid was studied. The effects of impurity ions such as Cl-, Fe3 + and SO2-4 on the corrosion Impact. The results showed that the corrosion rate of stainless steel also increased with the increase of Cl- content in itaconic acid medium, while its pitting potential decreased linearly with the logarithm of Cl- concentration. The increase of Fe3 + concentration could make stainless steel / Liquid from the activation system into activation-passivation system; SO2-4 slightly corrosion of stainless steel; in the impurity of itaconic acid medium, R1 duplex stainless steel corrosion resistance and pitting resistance significantly better than 316L Austenitic stainless steel.