铬含量对铁素体不锈钢在硫酸溶液中耐腐蚀性的影响。

Effect of chromium content on the corrosion resistance of ferritic stainless steels in sulfuric acid solution.

作者信息

Yu Yang, Shironita Sayoko, Souma Kenichi, Umeda Minoru

机构信息

Department of Materials Science and Technology, Graduate School of Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata, 940-2188, Japan.

Hitachi Industrial Equipment Systems Co., Ltd., 3 Kanda Neribei, Chiyoda, Tokyo, 101-0022, Japan.

出版信息

Heliyon. 2018 Nov 22;4(11):e00958. doi: 10.1016/j.heliyon.2018.e00958. eCollection 2018 Nov.

DOI:10.1016/j.heliyon.2018.e00958

PMID:30839865

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6251019/

Abstract

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 on SEM images. Corrosion resistivity was improved for high Cr content (>24 mass%) stainless steel because it is considered to form a stable passivation layer.

摘要

由于近期镍价上涨，目前全球钢铁使用正从奥氏体不锈钢转向铁素体不锈钢。在本研究中，研究了四种不同铬含量的铁素体不锈钢的腐蚀行为，以研究铬含量对硫酸溶液中耐腐蚀性的影响。铬含量最高的铁素体不锈钢的极化曲线表明其耐腐蚀性最佳。根据扫描电子显微镜图像，在进行电位扫描后，含24质量%铬的不锈钢未观察到腐蚀现象。高铬含量（>24质量%）不锈钢的耐腐蚀性得到改善，因为据认为它会形成稳定的钝化层。