电化学充氢对X80管线钢在鹰潭土壤模拟溶液中应力腐蚀行为的影响

中国腐蚀与防护学报

2013, Vol. 33

Issue (5): 388-394

研究报告

本期目录 | 过刊浏览

电化学充氢对X80管线钢在鹰潭土壤模拟溶液中应力腐蚀行为的影响

梅华生, 王长朋, 张帷, 周漪, 杨王玲

中国兵器工业第五九研究所重庆 400039

Effect of Hydrogen Charging on Stress Corrosion Cracking of X80 Pipeline Steel in Simulated Yingtan Soil Solution

MEI Huasheng, WANG Changpeng, ZHANG Wei, ZHOU Yi, YANG Yi, WANG Ling

No.59 Institute of China Ordnance Industry, Chongqing 400039, China

全文: PDF(8871 KB)

摘要: 采用电化学技术、慢应变速率拉伸实验和扫描电镜(SEM)对电化学充氢后的X80管线钢在鹰潭土壤模拟溶液中的应力腐蚀行为进行了研究。结果表明：X80管线钢静态充氢后在鹰潭土壤模拟溶液中具有较高的应力腐蚀(SCC)敏感性，其断口模式为穿晶断裂；随着电化学充氢时间的延长，氢致塑性损失不断增加，拉伸断口由韧窝状韧性断口向脆性解理断口发展，SCC敏感性增大；电化学充氢促进了点蚀坑的萌生，点蚀坑和第二相夹杂是SCC裂纹萌生的重要原因。

关键词 ： X80管线钢, 应力腐蚀, 电化学充氢, 土壤模拟溶液

Abstract：Stress corrosion cracking (SCC) of X80 pipeline steel after electrochemically hydrogen-charging in an artificial solution simulated the waters contained in sour soil at Yingtan district in south China was studied by means of potentiodynamic polarization curves, slow strain rate tests (SSRT) and SEM observation. The results show that X80 pipeline steel has high SCC susceptibility in the solution after hydrogen-charging and the failure mode is transgranular cracking. Moreover, the SCC susceptibility and relative plasticity losses increased with increasing electrochemical charging time, the tensile fracture surfaces exhibited a change from ductile dimple fracture to cleavage fracture. In addition, permeation of hydrogen promoted the formation of pits，and therewith pits and nonmetallic inclusions in the steel were found to play an important role for the initiation of SCC cracks.

Key words： X80 pipeline steel stress corrosion cracking electrochemically hydrogen-charging simulated soil solution

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梅华生, 王长朋, 张帷, 周漪, 杨王玲. 电化学充氢对X80管线钢在鹰潭土壤模拟溶液中应力腐蚀行为的影响[J]. 中国腐蚀与防护学报, 2013, 33(5): 388-394.
. Effect of Hydrogen Charging on Stress Corrosion Cracking of X80 Pipeline Steel in Simulated Yingtan Soil Solution. Journal of Chinese Society for Corrosion and protection, 2013, 33(5): 388-394.

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2013/V33/I5/388

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