铁素体不锈钢在盐酸基溶液中的加速腐蚀行为研究

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基金项目:

国家自然科学基金(51374060), 辽宁省科技攻关项目(2012221013)。

Experimental Studies on Corrosion Behaviour of Ferritic Stainless Steel in HCl Based Solution

Ministry of Education Key Laboratory for Ecological Metallurgy of Multimetallic mineral, Northeastern University, Shen yang 110819, Liaoning, China

摘要: 以抛丸后的热轧430铁素体不锈钢板为原料,通过酸洗模拟试验,结合腐蚀失重测定、微观形貌分析、极化曲线及交流阻抗谱测试,研究了氧化剂氯酸钾(KClO₃)对铁素体不锈钢盐酸基酸洗过程及板面质量的影响作用规律。试验结果表明:KClO₃可以通过加速阴极反应速率,减小电荷转移电阻,从而明显加速铁素体不锈钢的酸洗进程,但过量加入时易产生点蚀倾向。KClO₃可以作为适用于铁素体不锈钢盐酸基酸洗盐酸工艺的合理氧化剂,其适宜的加入量为1%。
- 铁素体不锈钢 /
- 盐酸酸洗 /
- 腐蚀行为 /
- 极化曲线 /
- 阻抗图谱 /
- 氯酸钾
Abstract: The effect of potassium chlorate （KClO₃） as oxidants on pickling behaviour in HCl-based electrolyte and the surface quality of original hot-rolled and blasted 430 stainless steel （430-SS） were studied,by means of weight-loss tests,microstructure analyses,potentiodynamic polarization curves and electrochemical impedance spectroscopy measurements. The results showed significantly accelerated pickling process for 430-SS happened by adding KClO₃ through enhanced cathodic reaction rate and reduced Rt,with pitting corrosion when excess KClO₃ was added. KClO₃ is a proper oxidant for pickling in HCl-based electrolyte of 430-SS,with reasonable addition of 1%.
- ferritic stainless steel /
- HCl pickling /
- corrosion behavior /
- polarization curve /
- EIS /
- KClO₃