碳钢及低合金钢在氯离子溶液中夹杂物诱发点蚀位置显微腐蚀实验探讨

doi:10.13228/j.issn.1000-7571.2014.01.004

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摘要选择3种冶金因素有代表性的碳钢及低合金钢, 通过极化实验方法确定点蚀诱发初期及点蚀期的电位值, 利用显微腐蚀实验方法和电子探针分析了不同夹杂物在诱发点蚀过程中的特征, 并在利用琼脂涂封的条件下, 考察及分析了点蚀诱发时夹杂物溶解析出情况。结果表明:夹杂物是钢中主要点蚀诱发源, 钢基体与夹杂物交界处的钝化膜保护作用最弱, 点蚀均从该处诱发;点蚀诱发初期, 钢基体与夹杂物交界处的钝化膜破裂时, 对硫化物夹杂, 优先析出的是铁离子, 而不是硫离子;夹杂物的成分及形态的不同都会影响到产物的溢出位置。

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	张春亚
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	李智

关键词 ：碳钢, 低合金钢, 夹杂物, 琼脂涂封, 显微腐蚀实验

Abstract：Three types of carbon steels and low alloy steels with representative metallurgical factors were selected, the potential values in the pitting initiation time and the pitting time were determined with polarization test, and the characteristics of different inclusions in the pitting initiation process were measured with micro-corrosion test method and electronic probe micro analysis. With agar enveloping technique, the solution and precipitation of the inclusions at the time of the pitting initiation was observed and analyzed. The results showed that inclusions were the main pitting initiators in the steel, and as the protection capacity of the passivation layer at the border between the steel matrix and the inclusions was the weakest, pitting was initiated at this laye; at the early phase of the pitting initiation, when the passivation layer at the border between the steel matrix and the inclusions broke, in terms of sulfide inclusions, the first precipitation was iron ion instead of sulfur ion; and the differences in the composition and forms of the inclusions could affect the precipitation position of the products.

Key words： carbon steel low alloy steel inclusion the agar enveloping technique micro-corrosion test

收稿日期: 2013-06-13

ZTFLH:

TG172.5

基金资助:湖北出入境检验检疫局科技计划项目(HUBE2012-04)

作者简介: 张春亚(1969-), 男, 硕士, 高级工程师, 主要从事材料科学及耐蚀性方面研究E-mail:zhangcy@hbciq.gov.cn

引用本文:

张春亚, 张奇, 李继高, 熊承刚, 李智. 碳钢及低合金钢在氯离子溶液中夹杂物诱发点蚀位置显微腐蚀实验探讨[J]. 冶金分析, 2014, 34(1): 22-27.
ZHANG Chun-ya, ZHANG Qi, LI Ji-gao, XIONG Cheng-gang, LI Zhi. Micro-corrosion test research on pitting initiation site of the inclusions ofcarbon steel and low alloy steel in chlorine ion solution. , 2014, 34(1): 22-27.

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http://47.93.29.245/Jweb_yjfx/CN/10.13228/j.issn.1000-7571.2014.01.004 或 http://47.93.29.245/Jweb_yjfx/CN/Y2014/V34/I1/22

[1]	Z Szklarska-Smialowska. Mechanism of pit nucleation by electrical breakdown of the passive film[J] . Corros. Sci., 2002, 44(5):1143.
[2]	张春亚, 胡裕龙, 袁东红, 等.在3％NaCl溶液中试验参数对碳钢点蚀电位的影响[J] .腐蚀科学与防护技术(Corrosion Science and Protection Technology), 2005, 17(3):181-183.
[3]	林昌健, 谢兆雄, 田昭武.不锈钢点腐蚀的早期过程Ⅱ.电化学扫描隧道显微研究[J] .腐蚀科学与防护技术(Corrosion Science and Protection Technology), 1997, 9(4):3-8.
[4]	陈学群, 杨思诚, 常万顺, 等. 耐蚀碳素船体钢及耐蚀性快速检验方法研究(鉴定文献之七:显微腐蚀实验)[M] .武汉:海军工程大学出版社, 1995.
[5]	陈学群, 杨思诚, 常万顺, 等. 耐蚀碳素船体钢及耐蚀性快速检验方法研究(鉴定文献之九)[M] .武汉:海军工程大学出版社, 1995.
[6]	S.C.Srivastava, M.B.Ives.Dissolutions of inclusions in low alloy steel exposed to chloride containing environments [J] .Corrosion-NACE, 1987, 43(11):687-692.
[7]	宋诗哲, 曹楚南. 恒电位-恒电流瞬态技术研究钝化膜的稳定性[J] .中国腐蚀与防护学报(Journal of Chinese Society for Corrosion and Protection), 1990, 10(4):297-306.
[8]	郭瑞金, 火时中.小孔腐蚀诱发过程的研究[J] .中国腐蚀与防护学报(Journal of Chinese Society for Corrosion and Protection), 1986, 6(2):113-122.
[9]	陈学群, 孔小东, 常万顺, 等.低碳钢中硫化物夹杂物诱发点蚀的机理[J] .海军工程学院学报(Journal of Naval University of Engineering), 1997, (1):1-9.
[10]	G L Cao, G M Li, W S Chang, et al. Effect of deoxidization and inclusions on pitting behaviors of carbon steels[C] .Proceeding of 13th Quality of Steels and Control of Inclusions, Xining, 2008:192.