| 引用本文: | 李雪莹,吴钱林,范春华,董丽华,尹衍升.含H2S的NaCl溶液中溶解氧对PH13-8Mo钢腐蚀性能的影响[J].材料科学与工艺,2019,27(3):8-15.DOI:10.11951/j.issn.1005-0299.20180136. |
| LI Xueying,WU Qianlin,FAN Chunhua,DONG Lihua,YIN Yansheng.Effect of dissolved oxygen on corrosion behavior of PH13-8Mo steel in NaCl solution containing H2S[J].Materials Science and Technology,2019,27(3):8-15.DOI:10.11951/j.issn.1005-0299.20180136. |
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| 摘要: |
| 为研究新型马氏体沉淀硬化不锈钢PH13-8Mo在含饱和H2S的NaCl溶液中的腐蚀行为，利用极化曲线、电化学阻抗谱等电化学测试和浸泡实验相结合的方法，通过扫描电子显微镜(SEM)和X射线光电子能谱分析技术(XPS)，观察了该高强钢在含H2S的除氧和不除氧的NaCl溶液中的腐蚀形貌，并对其腐蚀产物的成分进行了分析.结果表明：在除氧的NaCl溶液中，阳极极化曲线的形状发生了明显的变化，电化学阻抗谱的容抗弧的幅值也较未除氧的溶液中变小；在除氧的NaCl溶液中浸泡7 d后，由于H2S水解后的S2-或HS-离子侵入到钝化膜的内部，并与钝化膜或金属基体发生反应，使得试样表面发生全面腐蚀，腐蚀产物主要为Fe、Cr、Ni、Mo的氧化物和硫化物；而在未除氧的NaCl溶液中浸泡后，试样表面仅发生局部腐蚀. |
| 关键词: PH13-8Mo高强钢 H2S 钝化膜 耐腐蚀性能 极化曲线 电化学阻抗谱 |
| DOI：10.11951/j.issn.1005-0299.20180136 |
| 分类号:TG172 |
| 文献标识码:A |
| 基金项目:国家重点基础研究发展计划(2014CB643306). |
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| Effect of dissolved oxygen on corrosion behavior of PH13-8Mo steel in NaCl solution containing H2S |
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LI Xueying, WU Qianlin, FAN Chunhua, DONG Lihua, YIN Yansheng
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(College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China)
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| Abstract: |
| This paper aims to study the corrosion behavior of new martensitic precipitation hardening stainless steel PH13-8Mo in NaCl solution containing saturated H2S. The corrosion behavior of PH13-8Mo steel with saturated H2S in deoxidized or without-deoxidized NaCl solution was studied by polarization curve, electrochemical impedance spectroscopy measurements, and immersion tests, combined with scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Results show that the shape of the anodic polarization curve changed significantly, and the capacitive arc of the electrochemical impedance spectroscopy was smaller compared with that in without-deoxidized NaCl solution. After being immersed in deoxidized NaCl solution for 7 d, general corrosion occurred because the S2- or HS- ions intruded into the inner of the passive film after H2S hydrolysis and reacted with the passive film or the metal matrix. The corrosion products were mainly the oxide and sulfide of Fe, Cr, Ni, and Mo. Local corrosion occurred only on the surface of the sample after immersed in the deoxidized NaCl solution with saturated H2S. |
| Key words: PH13-8Mo high-strength steel H2S passive film corrosion behavior polarization curve electrochemical impedance spectroscopy |
