模拟浅海及深海环境中阴极极化对<strong>10CrNi5MoV</strong>钢氢脆敏感性的影响

doi:10.11902/1005.4537.2025.060

中国腐蚀与防护学报

2025, Vol. 45

Issue (6): 1599-1609 CSTR: 32134.14.1005.4537.2025.060 DOI: 10.11902/1005.4537.2025.060

研究报告

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模拟浅海及深海环境中阴极极化对10CrNi5MoV钢氢脆敏感性的影响

项琦峰, 赵阳(

), 张涛, 王福会

东北大学数字钢铁全国重点实验室沈阳 110819

Influence of Cathodic Polarization on Hydrogen Embrittlement Susceptibility of 10CrNi5MoV Steel in Simulated Shallow-sea and Deep-sea Environment

XIANG Qifeng, ZHAO Yang(

), ZHANG Tao, WANG Fuhui

State Key Laboratory of Digital Steel, Northeastern University, Shenyang 110819, China

引用本文:

项琦峰, 赵阳, 张涛, 王福会. 模拟浅海及深海环境中阴极极化对10CrNi5MoV钢氢脆敏感性的影响[J]. 中国腐蚀与防护学报, 2025, 45(6): 1599-1609.
Qifeng XIANG, Yang ZHAO, Tao ZHANG, Fuhui WANG. Influence of Cathodic Polarization on Hydrogen Embrittlement Susceptibility of 10CrNi5MoV Steel in Simulated Shallow-sea and Deep-sea Environment[J]. Journal of Chinese Society for Corrosion and protection, 2025, 45(6): 1599-1609.

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摘要:

10CrNi5MoV低合金高强度钢在深海环境、阴极保护与应力的共同作用下，可能会引发严重的氢脆。本研究采用动电位极化、电化学阻抗谱(EIS)、慢应变速率拉伸(SSRT)等实验方法，结合扫描电镜(SEM)观察断口显微组织，研究了10CrNi5MoV高强钢在实验室模拟浅海(0 m)及深海(1000 m)环境不同阴极极化电位下的氢脆敏感性。结果表明，随着阴极极化电位负移，浅海环境下样品表现出较好的抗氢脆能力，-1050 mV时氢脆敏感性系数接近25%，深海环境下样品氢脆敏感性系数则最高达到了59.7%。深海环境虽抑制腐蚀与析氢反应的进行，却促进了氢向材料内部的扩散，显著提高了材料在阴极保护条件下的氢脆敏感性。

关键词 ： 10CrNi5MoV钢, 深海环境, 阴极极化, 氢脆敏感性, 慢应变速率拉伸

Abstract：

10CrNi5MoV low-alloy high-strength steel may experience severe hydrogen embrittlement in deep-sea environment, while subjected to stress and cathodic protection. Hence, the hydrogen embrittlement susceptibility of 10CrNi5MoV high-strength steel in the simulated shallow sea (0 m) and deep sea (1000 m) environments by applied polarization potentials was assessed via potentiostat, electrochemical impedance spectroscopy (EIS), slow strain rate tensile (SSRT) and scanning electron microscopy (SEM). With the applied cathodic polarization potential negatively dropped from open circuit potential to -1050 mV, the hydrogen embrittlement susceptibility coefficient of the steel is about 25% in the shallow sea environment. However, which in the deep-sea environment reaches 59.7%. Although the corrosion and hydrogen evolution reactions are suppressed to certain extent in the deep-sea environment, whereas the diffusion of hydrogen atoms inwards the material is promoted, therewith the hydrogen embrittlement susceptibility of the steel is enhanced under cathodic protection.

Key words： 10CrNi5MoV steel deep-sea environment cathodic polarization hydrogen embrittlement susceptibility slow strain rate tensile

收稿日期: 2025-02-23 32134.14.1005.4537.2025.060

ZTFLH:

TG174

通讯作者: 赵阳，E-mail：zhaoyang7402@mail.neu.edu.cn，研究方向为油气工业腐蚀与防护

Corresponding author: ZHAO Yang, E-mail: zhaoyang7402@mail.neu.edu.cn

作者简介: 项琦峰，男，2000年生，硕士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2025.060 或 https://www.jcscp.org/CN/Y2025/V45/I6/1599

图1 低温高压电化学测试-慢应变速率拉伸实验装置

图2 SSRT实验片状拉伸样品尺寸与样品处理方法示意图

图3 10CrNi5MoV钢金相显微组织

图4 10CrNi5MoV 钢在模拟浅海及深海环境下的阴极极化曲线

图5 浅海和深海不同极化电位下10CrNi5MoV钢的Nyquist与Bode图

图6 10CrNi5MoV在不同阴极保护电位下的EIS等效电路

表1 浅海和深海环境不同极化电位下10CrNi5MoV钢EIS等效电路拟合参数

图7 10CrNi5MoV钢在浅海与深海环境不同电位下的电荷转移电阻Rt

图8 10CrNi5MoV钢在浅海和深海环境中不同极化电位下的应力-应变曲线

图9 10CrNi5MoV在浅海和深海环境中不同极化电位下的氢脆敏感性系数

图10 浅海环境10CrNi5MoV钢不同极化电位下SSRT后断口形貌

图11 深海环境10CrNi5MoV钢不同极化电位下SSRT后断口形貌

图12 浅海环境10CrNi5MoV 钢不同极化电位下SSRT后断口侧面形貌

图13 深海环境10CrNi5MoV钢不同极化电位下SSRT后断口侧面形貌

图14 10CrNi5MoV钢在模拟浅海阴极极化下的裂纹扩展示意图

图15 10CrNi5MoV钢在模拟深海阴极极化下的裂纹扩展示意图

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