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In-situ evaluation for corrosion process at fusion boundary of stainless steel strip overlay joints in H2S containing solution 被引量:2

In-situ evaluation for corrosion process at fusion boundary of stainless steel strip overlay joints in H2S containing solution
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摘要 The present work studied the corrosion properties around the fusion boundaries of 2.25Cr-1Mo steel with stainless steel strip overlay joints under as welded condition and after post-weld heat treatment (PWHT) in H2 S containing solution (NACE TM-01-77 standard) with different time. An in-situ observation method was introduced for evaluating corrosive progress in the fusion boundary in H2 S containing solution, that is, the samples were marked firstly at the boundary and then treated in the solution for variant time. Each time after the corrosion treatment, the observations were kept to focus at the same marked area by using scanning electron microscopy (SEM) to observe the corrosion progress. The results reveal that the fusion boundary is the worst region for corrosion resistance when comparing with other boundaries, and a broad fusion boundary has a stronger resistance for "hydrogen induced disbonding" than a narrow one.
出处 《中国有色金属学会会刊:英文版》 CSCD 2004年第z1期413-419,共7页 Transactions of Nonferrous Metals Society of China
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