阴极极化对两种高强度<strong>Ni-Cr-Mo-V</strong>钢氢脆行为的影响

doi:10.11902/1005.4537.2025.356

中国腐蚀与防护学报

2026, Vol. 46

Issue (5): 1527-1536 CSTR: 32134.14.1005.4537.2025.356 DOI: 10.11902/1005.4537.2025.356

研究报告

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阴极极化对两种高强度Ni-Cr-Mo-V钢氢脆行为的影响

臧勃林¹, 吴昊², 殷文昌¹, 杨艳冬³, 田会云²(

), 崔中雨²

^1.中国人民解放军92228部队北京 100072
^2.中国海洋大学材料科学与工程学院青岛 266100
^3.哈尔滨工程大学材料科学与化学工程学院哈尔滨 150001

Effect of Cathodic Polarization on Hydrogen Embrittlement Behavior of Two High-strength Ni-Cr-Mo-V Steels

ZANG Bolin¹, WU Hao², YIN Wenchang¹, YANG Yandong³, TIAN Huiyun²(

), CUI Zhongyu²

^1.Unit 92228, People's Liberation Army, Beijing 100072, China
^2.School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
^3.College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China

引用本文:

臧勃林, 吴昊, 殷文昌, 杨艳冬, 田会云, 崔中雨. 阴极极化对两种高强度Ni-Cr-Mo-V钢氢脆行为的影响[J]. 中国腐蚀与防护学报, 2026, 46(5): 1527-1536.
Bolin ZANG, Hao WU, Wenchang YIN, Yandong YANG, Huiyun TIAN, Zhongyu CUI. Effect of Cathodic Polarization on Hydrogen Embrittlement Behavior of Two High-strength Ni-Cr-Mo-V Steels[J]. Journal of Chinese Society for Corrosion and protection, 2026, 46(5): 1527-1536.

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摘要:

采用电化学测量、慢应变速率拉伸试验、断口形貌观察及氢浓度测量等方法，研究了阴极保护电位的变化对两种Ni-Cr-Mo-V高强度合金钢(A钢和B钢)在人工海水中的氢脆行为的影响及其机理。结果表明，在人工海水中A钢和B钢的析氢电位为分别-1000 mV和-880 mV。随阴极电位的负移，两种钢的氢脆敏感性显著增强。虽然它们在-750 mV时均处于断裂低风险区，但是在-850 mV时B钢已处于脆断区，A钢则处于危险区。当电位低于-950 mV时，两种钢均处于脆断发生区。这可能归因于B钢中大量的位错有利于促进氢原子向材料内部的扩散，同时板条状的晶界结构相较于A钢颗粒状晶界可以吸收更多的氢，导致B钢高的氢脆敏感性。

关键词 ： Ni-Cr-Mo-V钢, 阴极极化, 氢脆, 氢浓度

Abstract：

The influence of different applied cathodic potentials on the hydrogen embrittlement susceptibility of two Ni-Cr-Mo-V high-strength alloy steels (steel A and steel B) in artificial seawater was investigated by means of electrochemical measurement, slow strain rate tensile testing, fracture morphology observation, and hydrogen concentration measurement. The results indicate that the potential at which steel A undergoes only the hydrogen evolution reaction in artificial seawater is -1000 mV, while that of steel B is -880 mV. Moreover, as the cathodic potential shifts to more negative values, the hydrogen embrittlement susceptibility of both steels increases significantly. Although by applied potential -750 mV, the two steels all locate in low-risk zone of fracture, in contrast, by potential -850 mV, the steel B locates in zone of brittle fracture occurrence, while the steel A locates in high-risk zone. By applied potential -950 mV and below, the two steels locate all in embrittlement fracture zone. This may be attributed to that a large number of dislocations in steel B can enhance the diffusion of hydrogen atoms inwards the steel substrate, and the lath-like grain boundary structure can absorb more hydrogen rather than the granular grain boundary of steel A, thus the steel B shows higher sensitivity to hydrogen embrittlement.

Key words： Ni-Cr-Mo-V steel cathodic polarization hydrogen embrittlement hydrogen concentration

收稿日期: 2025-11-17 32134.14.1005.4537.2025.356

ZTFLH:

TG174

基金资助:国家自然科学基金(52371080);国家自然科学基金(52401120);国家重点研发计划(2023YFB3710300)

通讯作者: 田会云，E-mail：tianhuiyun@ouc.edu.cn，研究方向为环境敏感断裂

Corresponding author: TIAN Huiyun, E-mail: tianhuiyun@ouc.edu.cn

作者简介: 臧勃林，男，1985年生，硕士，工程师

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https://www.jcscp.org/CN/10.11902/1005.4537.2025.356 或 https://www.jcscp.org/CN/Y2026/V46/I5/1527

图1 A钢和B钢的金相显微组织

表1 两种Ni-Cr-Mo-V钢的化学成分 (mass fraction / %)

图2 A钢和B钢的IPF取向图、KAM图、晶界分布图及晶粒尺寸统计图

图3 A钢和B钢在人工海水溶液中的动电位极化曲线

图4 A钢和B钢在不同阴极电位下的EIS图及相应拟合电路

表2 A钢和B钢在开路至-950 mV电位下的EIS拟合参数

表3 A钢和B钢在-1050 mV至1500 mV电位下的EIS拟合参数

图5 不同阴极电位下A钢和B钢在人工海水溶液中的应力-应变曲线

图6 不同阴极电位下A钢和B钢的断面收缩率和伸长率

图7 不同阴极电位下A钢和B钢的伸长率损失和面缩率损失得到的开裂敏感性

图8 不同阴极电位下A钢在人工海水中的断口形貌

图9 不同阴极电位下B钢在人工海水中的断口形貌

图10 A钢和B钢在不同阴极电位下氢氧化电流密度曲线及其氢浓度测试结果

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