H<sub>2</sub>S浓度对35CrMo钢应力腐蚀开裂的影响

中国腐蚀与防护学报

2013, Vol. 33

Issue (5): 357-362

研究报告

本期目录 | 过刊浏览

H₂S浓度对35CrMo钢应力腐蚀开裂的影响

郝文魁¹, 刘智勇¹, 张新², 杜翠薇¹, 李晓刚¹, 刘翔¹

1. 北京科技大学腐蚀与防护中心北京 100083;
2. 环境保护部核与辐射安全中心北京 100082

Effect of H₂S Concentration on Stress Corrosion Cracking Behavior of 35CrMo Steel in An Artificial Solution Simulated Drilling Well Waters at Oil Field

HAO Wenkui¹, LIU Zhiyong¹, ZHANG Xin², DU Cuiwei¹, LI Xiaogang¹, LIU Xiang¹

1. Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083,China;
2. Nunclear and Radiation Safety Center, Ministry of Environmental Protection, Beijing 100082,China

全文: PDF(6681 KB)

摘要: 用电化学技术研究了35CrMo钢在含有不同浓度H₂S溶液中的腐蚀行为，通过慢应变速率拉伸实验研究了35CrMo钢在不同浓度H₂S介质中的应力腐蚀开裂 (SCC) 行为与机理。结果表明：35CrMo钢在pH值为5的H₂S环境下存在SCC敏感性，H₂S浓度升高，SCC敏感性增加，H₂S浓度为200 mg/L时有明显的SCC敏感性。H₂S浓度达到200 mg/L时，能明显促进35CrMo钢腐蚀电化学过程进行。在pH值为5的H₂S环境下，35CrMo钢的SCC机制是以氢脆 (HE) 为主，阳极溶解(AD)为辅的协同机制。

关键词 ： 35CrMo, H₂S, 应力腐蚀, 腐蚀, 氢脆

Abstract：The corrosion behavior and stress corrosion cracking (SCC) of 35CrMo steel were examined respectively by means of electrochemical measurements and slow strain rate tensile test in an artificial solution with various concentration of H₂S, which aimed to simulate the drilling well environments at oil field. It is shown that 35CrMo steel exhibits a susceptibility to SCC in hydrogen sulfide solutions with pH=5. The susceptibility increases by decreasing the concentration of H₂S. When the concentration of H₂S reached 200 mg/L, the corrosion electrochemical process of 35CrMo steel can be promoted, whilst the steel exhibits obvious susceptibility to SCC. The SCC of 35CrMo steel is mainly induced by hydrogen embrittlement (HE) process associated with anodic dissolution (AD) in hydrogen sulfide solutions with pH=5.

Key words： 35CrMo steel H₂S stress corrosion cracking corrosion hydrogen embrittlement

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引用本文:

郝文魁, 刘智勇, 张新, 杜翠薇, 李晓刚, 刘翔. H₂S浓度对35CrMo钢应力腐蚀开裂的影响[J]. 中国腐蚀与防护学报, 2013, 33(5): 357-362.
HAO Wenkui, LIU Zhiyong, ZHANG Xin, DU Cuiwei, LI Xiaogang, LIU Xiang. Effect of H₂S Concentration on Stress Corrosion Cracking Behavior of 35CrMo Steel in An Artificial Solution Simulated Drilling Well Waters at Oil Field. Journal of Chinese Society for Corrosion and protection, 2013, 33(5): 357-362.

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2013/V33/I5/357

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