微观组织对X52钢抗H<sub>2</sub>S腐蚀和开裂性能的影响

中国腐蚀与防护学报

2012, Vol. 32

Issue (2): 95-101

研究报告

本期目录 | 过刊浏览

微观组织对X52钢抗H₂S腐蚀和开裂性能的影响

姚学军,王俭秋,左景辉,韩恩厚,柯伟

中国科学院金属研究所金属腐蚀与防护国家重点实验室沈阳 110016

MICROSTRUCTURE EFFECTS ON CORROSION AND CRACKING BEHAVIOR OF X52 PIPELINE STEEL IN H₂S ENVIRONMENT

YAO Xuejun, WANG Jianqiu, ZUO Jinghui, HAN En-Hou, KE Wei

State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016

全文: PDF(2378 KB)

摘要: 通过对X52钢进行热处理获得三种不同组织。SEM观察发现三种组织分别为铁素体/带状珠光体、马氏体/贝氏体和针状铁素体/回火马氏体。通过动电位极化、线性极化电阻、氢致开裂（HIC）实验和硫化物应力腐蚀开裂（SSC）实验，研究了不同热处理对X52钢在H₂S环境中的腐蚀与开裂行为的影响。结果表明马氏体/贝氏体显微组织由于位错密度很高且脆性大，因而腐蚀速率及HIC和SSC敏感性很高。铁素体/带状珠光体组织和针状铁素体/回火马氏体组织腐蚀速率及HIC和SSC敏感性很低。针状铁素体/回火马氏体组织由于不含带状组织且晶粒细小以及碳化物的析出，因此其HIC和SSC抗性优于铁素体/带状珠光体组织。

关键词 ：低合金钢, 微观组织, 硫化氢, 氢致开裂, 硫化物应力腐蚀开裂

Abstract：Three different microstructures of X52 pipeline steel were obtained through different heat treatments. SEM results showed that the three different microstructures were ferrite/band pearlite, martensite/bainite and acicular ferrite/tempered martensite. The effects of microstructures on corrosion and cracking behavior of X52 steel in the H₂S-containing solution were studied through potentiodynamic polarization measurements, linear polarization resistance measurements, hydrogen induced cracking (HIC) tests and sulfide stress cracking (SSC) tests. The results showed that martensite/bainite had the highest corrosion rate as well as highest susceptibility to suffer HIC and SSC of all the three microstructures due to its high density tangled dislocation and its high brittlement. Both of ferrite/band pearlite and acicular ferrite/tempered martensite had lower corrosion rate and better HIC and SSC resistance compared to martensite/bainite. However, the acicular ferrite/tempered martensite microstructure had higher resistance of HIC and SSC than ferrite/band pearlite due to the elimination of band structures, grain refinement and the precipitation of fine carbides in the matrix.

Key words： low alloyed steel microstructures H₂S HIC SSC

收稿日期: 2010-12-22

ZTFLH:

TG172.9

基金资助:

中国石化青岛安全工程研究院化学品安全控制国家重点实验室资助

通讯作者: 王俭秋 E-mail: wangjianqiu@imr.ac.cn

Corresponding author: Jianqiu WANG E-mail: wangjianqiu@imr.ac.cn

作者简介: 姚学军，男，1985年生，硕士生，研究方向为H$_{2}$S的腐蚀与防护

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引用本文:

姚学军,王俭秋,左景辉,韩恩厚,柯伟. 微观组织对X52钢抗H₂S腐蚀和开裂性能的影响[J]. 中国腐蚀与防护学报, 2012, 32(2): 95-101.
YAO Hua-Jun, YU Jian-Qiu. MICROSTRUCTURE EFFECTS ON CORROSION AND CRACKING BEHAVIOR OF X52 PIPELINE STEEL IN H₂S ENVIRONMENT. J Chin Soc Corr Pro, 2012, 32(2): 95-101.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2012/V32/I2/95

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