Effect of solution pH, Cl− concentration and temperature on electrochemical behavior of PH13-8Mo steel in acidic environments

IF 3.1 2区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING
Xue-ying Li , Chun-hua Fan , Qian-lin Wu , Li-hua Dong , Yan-sheng Yin , Chang-jun Wang , Jian-xiong Liang
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引用次数: 9

Abstract

The effect of solution pH, Cl concentration and temperature on the electrochemical corrosion behavior of PH13-8Mo steel in acidic solution was investigated by using the electrochemical tests, scanning electron microscopy and X-ray photoelectron spectroscopy. The PH13-8Mo martensitic precipitation hardened stainless steel is in the passivity state when the pH value is above 3. 0, below which the anodic polarization curves of the steel are actively dissolved. The corrosion current density gradually decreases with increasing the solution pH and decreasing Cl concentration and solution temperature. Pits are initiated on the sample surface in the presence of the Cl and gradually developed into uniform corrosion with increasing the Cl concentrations. Moreover, the corrosion is more serious with an increase in solution temperature.

溶液pH、Cl−浓度和温度对酸性环境中PH13-8Mo钢电化学行为的影响
采用电化学试验、扫描电镜和x射线光电子能谱等方法研究了pH、Cl -浓度和温度对PH13-8Mo钢在酸性溶液中的电化学腐蚀行为的影响。pH值大于3时,PH13-8Mo马氏体沉淀硬化不锈钢处于钝化状态。0,低于此值,钢的阳极极化曲线被活性溶解。腐蚀电流密度随溶液pH值的升高、Cl -浓度的降低和溶液温度的降低而逐渐减小。在Cl -存在的情况下,试样表面产生凹坑,随着Cl -浓度的增加,凹坑逐渐发展为均匀腐蚀。而且,随着溶液温度的升高,腐蚀更加严重。
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来源期刊
CiteScore
4.30
自引率
0.00%
发文量
2879
审稿时长
3.0 months
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