氮化处理改善1Cr18Ni9Ti钢在MgCl_2溶液中应力腐蚀破裂性能的研究

中国腐蚀与防护学报

1988, Vol. 8

Issue (4): 313-317

研究报告

本期目录 | 过刊浏览

氮化处理改善1Cr18Ni9Ti钢在MgCl_2溶液中应力腐蚀破裂性能的研究

方益三;魏其谋

武汉材料保护研究所;武汉材料保护研究所

AN INVESTIGATION ON RESISTANCE OF A NITRIDED STAINLESS STEEL TO STRESS CORROSION CRACKING IN BOILING 42％ MgCl_2 SOLUTION

I'ang Yisan and Wei Qimou (Wuhan Research Institute of Material Protection)

全文: PDF(815 KB)

摘要: <正> 一、前言利用表面处理作为防止不锈钢应力腐蚀破裂(SCC)的有效途径已得到人们的普遍重视。我们以1Cr18Ni9Ti钢为基材,分别进行了电镀Ni-P、喷铝、离子氮化等表面处理,然后在42％MgCl_2沸腾(143℃)溶液中作恒载荷拉伸试验,结果表明离子氮化处理对改善不锈钢抗SCC性能的效果最明显。

Abstract：An investigation on SCC behavior of 1Cr18Ni9Ti austenitic stainless steel and its ion-nitrided samples has been carried out by constant loading tensile test, electrochemical method and acoustic emission technique. The result shows that the ion-nitriding process is an effective measure for improving the SCC resistance in chloride medium. Local nitriding on stainless steel can also postpone the initiation of SCC. A new explanation on mechanism of improving SCC resistance of stainless steel by nitriding is described in this paper. It is suggested that the main cause for improved SCC resistance stainless steel is the shift of corrosion potential below the critical cracking potential (just after the establishment of galvanic couple) rather than the compressive stress induced on the surface layer by nitriding.

收稿日期: 1988-08-25

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方益三;魏其谋. 氮化处理改善1Cr18Ni9Ti钢在MgCl_2溶液中应力腐蚀破裂性能的研究[J]. 中国腐蚀与防护学报, 1988, 8(4): 313-317.
. AN INVESTIGATION ON RESISTANCE OF A NITRIDED STAINLESS STEEL TO STRESS CORROSION CRACKING IN BOILING 42％ MgCl_2 SOLUTION. J Chin Soc Corr Pro, 1988, 8(4): 313-317.

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1988/V8/I4/313

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