奥氏体不锈钢在沸腾42%MgCl_2溶液中应力腐蚀破裂过程的研究

中国腐蚀与防护学报

1984, Vol. 4

Issue (3): 187-198

研究报告

本期目录 | 过刊浏览

奥氏体不锈钢在沸腾42%MgCl_2溶液中应力腐蚀破裂过程的研究

王正樵;吴幼林;纪晓春

冶金部钢铁研究总院;冶金部钢铁研究总院;冶金部钢铁研究总院

A STUDY ON THE STRESS CORROSION CRACKING PROCESS OF TWO AUSTENITIC STAINLESS STEELS IN BOILING 42%MGCl_2 SOLUTION

Wang Zhenyqiao Wu Youlin Ji Xiaochun (The Central Institute of Iron and Steel Research; The Ministry of Metallurgical Industry)

全文: PDF(2831 KB)

摘要: 用恒负荷试验研究了18-8Ti和17-12Mo。钢在腾沸42％MgCl_2中的应力腐蚀破裂过程。考察了钢的持久蠕变行为。进行了模拟原电池试验和预蠕变试样的应力腐蚀试验。结果表明:奥氏体不锈钢在沸腾42％MgCl_2溶液中应力腐蚀破裂是形变活化和再钝化协合、相竞作用的结果。很难把破裂过程区分为不同质的阶段。根据不同参量确定的诱导期常不一致。裂纹在扩展初期主要是数量增多,继而沿长度和深度扩展。裂纹扩展期与外加应力大体有指数关系。两种钢的腐蚀断裂均为穿晶-晶间型;18-8Ti钢以穿晶为主,17-12Mo钢以晶间为主。

Abstract：The stress corrosion cracking(SCC)process of 18-8Ti and 17-12Mo stainless steel in boiling 42％ MgCl_2 solution was studied by using constant load tests. The endurance creep behavior of these steels was examined. Simulated galvanic cell tests and stress corrosion tests using pre-creeping specimens were conducted. The results suggested that SCC of austenitic stainless steels in boiling 42％ MgCl_2 solution results from synergism and competition between deformation-enhanced activation and repassivation of surface films. It is rather difficult to divide the cracking process into essentially different periods, The induction periods obtained with various parameters tend to be inconsistant At the early stage of crack propagation period(tp), it is the number of cracks that increases mainly, after which cracks propagate along the length and depth. The tp-σ(applied stress)relation seems to follow an exponential law. The SCC of both steels is transgranular(TC)-intergranular(IC); TC is predominantly observed in 18-8Ti steel, while IC prevails in 17-12Mo steel.

收稿日期: 1984-06-25

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引用本文:

王正樵;吴幼林;纪晓春. 奥氏体不锈钢在沸腾42%MgCl_2溶液中应力腐蚀破裂过程的研究[J]. 中国腐蚀与防护学报, 1984, 4(3): 187-198.
. A STUDY ON THE STRESS CORROSION CRACKING PROCESS OF TWO AUSTENITIC STAINLESS STEELS IN BOILING 42%MGCl_2 SOLUTION. J Chin Soc Corr Pro, 1984, 4(3): 187-198.

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1984/V4/I3/187

[1] Logan H. L., Journal of Resarch Bureau of Standards, 48, 99(1952)
[2] Hoar T. P., Corrosion, 19, 331(1963)
[3] Keating F. H., Symposium on Internal Stress in Metals and Alloys, 311, (1948)
[4] Kohl H., Corrosion, 23, 39(1967)
[5] P etit M. C. et al., Stress Corrosion Cracking and Hydrogen Embrittlement of IonBase Alloy. 1205(1977)
[6] Hoar T. P. et al., Proceedings of the Royal Society, A268． 304(1962)
[7] Katsuhisa Sugimoto, Transaction of the Japan Institute of Metals, 19, 422(1978)
[8] Hines J. G., Corrosion Science, 1, 2(1961)
[9] Borgst von H. U. et al., Werkstoffe and Korrosion, 22, 121(1971)
[10] Hoar T. P. et al., Journal of Iron and Steel Institute, 182, 124(1956)
[11] Mobee C. L., Electrochimica Acta, 17, 1337(1972)
[12] Miroyuki Ogawa et al., Corrosion, 34, 52(1978)

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