一种新型不锈钢的耐氯化物腐蚀性：临界氯化物值及表面状态的影响

Corrosion Resistance to Chloride of a Novel Stainless Steel: The Threshold Chloride Value and Effect of Surface State.

作者信息

Wang Hailong, Wu Yuanjian, Sun Xiaoyan, Ling Jiayan, Zou Daoqin

机构信息

Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China.

出版信息

Materials (Basel). 2019 Jul 11;12(14):2235. doi: 10.3390/ma12142235.

DOI:10.3390/ma12142235

PMID:31373335

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6678258/

Abstract

To evaluate the corrosion resistance of a novel stainless steel intended for use within reinforced concrete (RC) structures exposed to aggressive environments, the threshold chloride concentration of three stainless steels (316, 2205, novel 2205) and two carbon steels (HRB400, HRB500) exposed to pore solutions of fresh concrete was experimentally studied by means of electrochemical methods. The effect of steel surface state on the corrosion resistance was also experimentally investigated. The results showed that the novel stainless steel has a much higher corrosion resistance than those of the carbon steels and stainless steels when subjected to chloride environments. The presence of surface damage leads to significant decrease of corrosion resistance for carbon steel, however the corrosion can be certainly inhibited with the accumulation of rust on the steel surface. Although the oxide layer was worn, the novel 2205 stainless steel still has a great corrosion resistance.

摘要

为评估一种用于暴露在侵蚀性环境中的钢筋混凝土（RC）结构的新型不锈钢的耐腐蚀性，采用电化学方法对三种不锈钢（316、2205、新型2205）和两种碳钢（HRB400、HRB500）在新拌混凝土孔隙溶液中的临界氯离子浓度进行了实验研究。还通过实验研究了钢材表面状态对耐腐蚀性的影响。结果表明，在氯化物环境中，新型不锈钢的耐腐蚀性远高于碳钢和不锈钢。表面损伤的存在会导致碳钢的耐腐蚀性显著降低，然而，随着钢材表面铁锈的积累，腐蚀肯定可以得到抑制。尽管氧化层被磨损，但新型2205不锈钢仍具有很强的耐腐蚀性。