304不锈钢晶间敏化行为
Sensitization Behavior of 304 Stainless Steel
摘 要
采用双环电化学动电位再活化法(EPR)对敏化处理后的304不锈钢试样进行晶间腐蚀试验, 然后采用金相法观察试验后试样表面优先腐蚀的贫铬区的形态特征。结果表明, 304不锈钢在敏化过程中, 贫铬区首先以点状分布于晶界附近, 随着敏化程度的加剧, 贫铬区不断扩展连接, 形成链状分布, 链状的贫铬区再发生交联, 最终以网状分布于晶界附近。
贫铬区
敏化度
304不锈钢
intergranular sensitization
chromium depletion zone
degree of sensitization
304 stainless steel
Abstract
The thermally aged 304 stainless steel specimens were characterized for their degree of sensitization (DOS) by double-loop (DL) electrochemical potentiokinetic reactivation (EPR) method. Then the chromium depletion zones of these tested specimens were observed by metallographic microscopy. The results show that chromium depletion zones were first in the shape of points, then expanded to chains with the increase of DOS, and finally distributed near the grain boundaries in the form of mesh.
中图分类号 TG172
所属栏目 试验研究
基金项目
收稿日期 2012/7/8
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备注姜爱华, 硕士研究生,
引用该论文: JIANG Ai-hua,CHEN Liang,DING Yi,MA Li-qun. Sensitization Behavior of 304 Stainless Steel[J]. Corrosion & Protection, 2013, 34(5): 423
被引情况:
【1】刘 浩,唐建群,巩建鸣,温永彬, "预应变对304不锈钢薄板晶间腐蚀敏感性的影响",腐蚀与防护 37, 398-401(2016)
【2】朱江, "激光共聚焦扫描显微镜原位观察奥氏体不锈钢的敏化过程",理化检验－物理分册 52, 83-87(2016)
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参考文献
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【5】Kenji Kaneko, Tatsuya Fukunaga, Kazuhiro Yamada, et al. Formation of M23C6-type precipitates and chromium-depleted zones in austenite stainless steel[J].Scripta Materialia,2011,65(5):509-512.
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【2】Chowdhury S G, Singh R. The influence of recrystallized structure and texture on the sensitization behaviour of a stable austenitic stainless steel (AISI 316L) [J]. Scripta Mater,2008,58(10):1102-1105.
【3】Kina A Y, Souza V M, Tavares S S M, et al. Microstructure and intergranular corrosion resistance evaluation of AISI 304 steel for high temperature service[J]. Mater Charact,2008,59(6):651-655.
【4】Sidhom H, Amadou T, Sahlaoui H, et al. Quantitative evaluation of aged AISI 316L stainless steel sensitization to intergranular corrosion: comparison between microstructural electrochemical and analytical methods[J].Metall Mater Trans A,2007,38(11):1269-1280.
【5】Kenji Kaneko, Tatsuya Fukunaga, Kazuhiro Yamada, et al. Formation of M23C6-type precipitates and chromium-depleted zones in austenite stainless steel[J].Scripta Materialia,2011,65(5):509-512.
【6】罗宏, 龚敏.奥氏体不锈钢的晶间腐蚀[J].腐蚀科学与防护技术,2006,18(5):357-360.
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