阴极极化对921A钢海水中氢脆敏感性的影响

中国腐蚀与防护学报

2010, Vol. 30

Issue (1): 83-88

研究报告

本期目录 | 过刊浏览

阴极极化对921A钢海水中氢脆敏感性的影响

常娥^1;2;闫永贵²;李庆芬³;马力²

1. 哈尔滨工程大学材料科学与化学工程学院哈尔滨 150001
2. 中船重工725所海洋腐蚀与防护国防科技重点实验室青岛 266071
3. 哈尔滨工程大学机电工程学院哈尔滨 150001

EFFECTS OF CATHODIC POLARIZATION ON THE HYDROGEN EMBRITTLEMENT SENSITIVITY OF 921A STEEL IN SEA WATER

CHANG E^1;2; YAN Yonggui²; LI Qingfen³; MA Li²

1. School of Materials Science and Chemical Engineering; Harbin Engineering University; Harerbin 150001
2. Luoyang Ship Material Research Institute; State Key Laboratory for Marine Corrosion and Protection; Qingdao 266071
3. School of Mechanical and Electrical Engineering; Harbin Engineering University; Harerbin 150001

全文: PDF(1223 KB)

摘要:

利用慢应变速率实验和电化学方法研究了921A钢在海水中不同阴极极化电位下氢脆敏感性的变化趋势，并结合三维视频和扫描电镜观察断口形貌。结果表明，随阴极极化电位的负移，921A钢的韧性降低且氢脆系数增加。在极化电位负于 -0.960 V（相对于饱和甘汞电极电位），921A钢的氢脆系数显著增加至约20%，并出现准解理断裂特征形貌。

关键词 ：慢应变速率试验, 921A钢, 氢脆, 阴极极化

Abstract：

The susceptibility of 921A steel to hydrogen embrittlement was investigated by slow strain rate test and electrochemical study at different cathodic polarization potentials. Fracture surfaces observation were made by three-dimension microscope and scanning electron microscope (SEM). The results showed that the elongation, time-to-fracture, and fracture energy ratio decreased and hydrogen embrittlement coefficient increased with shifting potential in the negative direction. The elongation, time-to-fracture, and fracture energy ratio displayed uniform variance trend and exhibited the highest values when polarization potential was -0.710 V_SCE. when the polarization potentials were negative to -0.960 V _SCE, the hydrogen embrittlement coefficient suddenly increased and the fracture surfaces exhibited quasi-cleavage fracture. The brittle fracture was observed by three-dimension microscope when the polarization potential was -1.110 V_SCE. The resistance of hydrogen embrittlement decreased when the polarization potential reached -0.960 V_SCE.

Key words： slow strain rate test 921A steel hydrogen embrittlemen cathodic polarization

收稿日期: 2008-07-14

ZTFLH:

TG172.5

基金资助:

海洋腐蚀与防护国防科技重点实验室基金项目(9140C2502010701)资助

通讯作者: 常娥 E-mail: change@sunrui.net

Corresponding author: CHANG E E-mail: change@sunrui.net

作者简介: 常娥，女，1983年生，硕士生，研究方向为金属材料的腐蚀与防护

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引用本文:

常娥;闫永贵;李庆芬;马力. 阴极极化对921A钢海水中氢脆敏感性的影响[J]. 中国腐蚀与防护学报, 2010, 30(1): 83-88.
CHANG E. EFFECTS OF CATHODIC POLARIZATION ON THE HYDROGEN EMBRITTLEMENT SENSITIVITY OF 921A STEEL IN SEA WATER. J Chin Soc Corr Pro, 2010, 30(1): 83-88.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2010/V30/I1/83

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