XIE Xin,ZHAO Yi,DONG Guangbo,et al.Influence of Cr on Corrosion Resistance of Industrial Environment Steel[J].Plating & Finishing,2021,(9):13-18.[doi:10.3969/j.issn.1001-3849.2021.09.003]
Cr元素对工业环境用钢耐蚀性的影响
- Title:
- Influence of Cr on Corrosion Resistance of Industrial Environment Steel
- 文献标志码:
- A
- 摘要:
- 本文通过浸泡实验模拟工业环境，研究了Cr元素对工业环境用低合金钢耐蚀性影响。腐蚀失重结果表明，在Na2SO4质量分数为0.2%的水溶液中，三种含Cr低合金钢的腐蚀速率随腐蚀时间增加而降低，并且随Cr元素含量的增加，每个周期下的腐蚀速率都明显降低。浸泡后的电化学测试结果表明，Cr元素在低合金钢不同腐蚀周期内的作用不同，腐蚀初期（4 h），Cr元素降低了腐蚀阳极及阴极电流密度；腐蚀中期（54 h）Cr元素形成保护性好的腐蚀产物膜，提高了钢的耐蚀性，使钢的阳极电流密度的降低；腐蚀后期（104 h）Cr通过稳定腐蚀产物成分抑制了腐蚀阴极过程，降低了阴极电流密度。
- Abstract:
- The influence of Cr element on corrosion resistance of low alloy steel in simulated industrial environment was studied by immersion experiment. The corrosion weight loss results show that the corrosion rates of three kinds of low alloy steels containing Cr decrease with the increase of corrosion time in 0.2 wt.% Na2SO4 solution, and the corrosion rates decrease significantly with the increase of Cr element in each cycle. The electrochemical test results after immersion show that the effect of Cr element is different in different corrosion cycles of low alloy steel. At the initial corrosion stage （4 h）, Cr element reduces the current density of corrosion anode and cathode. In the middle stage of corrosion （54 h）, Cr element forms a protective corrosion product film which improves the corrosion resistance of steel and reduces the anode current density of steel. In the later stage of corrosion （104 h）, Cr can inhibit the corrosion cathode process and reduce the cathode current density by stabilizing the corrosion product composition.
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备注/Memo
收稿日期： 2020-10-29；修回日期： 2020-12-29
作者简介： 谢鑫（1981-），男，本科，工程师，email：xiexin@hbislt.com
通信作者： 徐学旭，email：xuxuexu1992@163.com