文章基本信息

标题：Evaluation of intergranular corrosion susceptibility of Super304H steel after being aged at 600°C
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作者：ZHANG Zhong-wen ; LI Xiulian ; LI Xin-mei 等
期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：267
期号：3
页码：1-8
DOI：10.1088/1755-1315/267/3/032043
出版社：IOP Publishing
摘要：The susceptibility to intergranular corrosion of as-received and 600°C aging-treated new austenite heat-resistance Super304H steel was investigated by double loop electrochemical potentiodynamic (EPR) test. Experimental results indicated that the as-received Super304H steel possesses lower tendency of intergranaular corrosion. With the increase of aging time, intergranular corrosion susceptibility of Super304H steel increases. Intergranular corrosion of Super304H steel occurs due to the precipitation of Cr₂₃C₆ along grain boundaries. At the initial stage of aging, the rapid precipitating behavior of Cr₂₃C₆ leads to the rapid increase of intergranlar corrosion susceptibility. The amount of Cr₂₃C₆ precipitates increases with the extension of aging time, and the intergranular corrosion susceptibility of Super304H steel increases accordingly. The extent of intergranular corrosion change is related to the precipitating rate of Cr₂₃C₆. ()