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| Study on Stress Corrosion Crack of 16Mn Steel in Wet Sulfureted |
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| 1. 北京科技大学腐蚀与防护中心 北京市腐蚀、磨蚀与表面技术开放实验室 |
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Abstract Stress corrosion cracking (SCC) behaviors of 16Mn and 16Mn(HIC) steels and their melted samples in acid H2S solution are investigated, with slow-strain-rate test(SSRT) and U-bent-specimen test.The results shows that both 16Mn(HIC) steel and 16Mn steel as well as their welded joint materials are all easy to subject to SCC damage in NACE solution, and the cracks of all specimens are HIC-induced transgranular cracks. The resistance to SCC of 16Mn(HIC) steel is better than that of 16Mn steel, as well as the behavior of weld joint of 16Mn(HIC) steel also performs better than that of 16Mn steel;the susceptivities of welded specimens of these two kinds of steel are much higher than those of their base materials, and heat treatment can improve the abilities of welded joint materials to resist SCC.
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Received: 11 July 2005
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