Effect of chromium content on the corrosion resistance of ferritic stainless steels in sulfuric acid solution
Effect of chromium content on the corrosion resistance of ferritic stainless steels in sulfuric acid solution
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DOI：
10.1016/j.heliyon.2018.e00958
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发表时间：
2018-11
期刊：
影响因子：
4
通讯作者：
Yang Yu;S. Shironita;K. Souma;M. Umeda
中科院分区：
文献类型：
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作者：
Yang Yu;S. Shironita;K. Souma;M. Umeda
由于最近镍的价格上涨，目前全球钢材的使用正在从奥氏体不锈钢转向铁素体不锈钢。研究了4种不同Cr含量的铁素体不锈钢在硫酸溶液中的腐蚀行为，探讨了Cr含量对铁素体不锈钢耐腐蚀性能的影响。极化曲线表明，Cr含量最高的铁素体不锈钢的耐蚀性最好。基于ex-situSEM图像的电位扫描后，没有观察到的不锈钢与24质量%的Cr的腐蚀。高Cr含量（>24质量%）不锈钢的耐腐蚀性得到改善，因为它被认为形成稳定的钝化层。
Due to recent increases in the price of Ni, steel use is currently undergoing a global shift from austenitic stainless steels to ferritic stainless steels. In this study, the corrosion behavior of four types ferritic stainless steels with different Cr contents was investigated to study the effect of Cr content on the corrosion resistance in a sulfuric acid solution. The polarization curves of the ferritic stainless steel with the highest Cr content indicated the best corrosion resistance. No corrosion was observed for the stainless steel with 24 mass% Cr after a potential sweep based onex-situSEM images. Corrosion resistivity was improved for high Cr content (>24 mass%) stainless steel because it is considered to form a stable passivation layer.