敏化态444不锈钢在热自来水中的点蚀行为
Pitting Behavior of Sensitized 444 Stainless Steel in Hot Tap Water
摘 要
采用电化学方法研究了敏化态444不锈钢在80℃自来水中的腐蚀行为。结果表明：在热自来水中，试样的极化电阻随敏化度增加而降低，表面钝化能力降低；耐点蚀性能与敏化度随敏化时间的演变特征相同，敏化度越高，试样的耐点蚀性能越差，点蚀会优先发生在敏化试样的晶界处。
敏化处理
自来水
点蚀
444 stainless steel
sensitization treatment
tap water
pitting
Abstract
The corrosion behavior of sensitized 444 stainless steel in 80 ℃ tap water was studied by electrochemical method. The results showed that in hot tap water, the polarization resistance of the sample decreased with the increase of the sensitization degree, and the surface passivation ability decreased. The pitting resistance and sensitization degree had similar evolution characteristics with the aging time. The higher the sensitization degree, the worse the pitting resistance performance of the sample. Pitting will occur preferentially at the grain boundaries of the sensitized sample.
中图分类号 TG174.4 DOI 10.11973/fsyfh-202110002
所属栏目 试验研究
基金项目 国家自然科学基金（U1960103；U1660205）
收稿日期 2020/3/15
修改稿日期
网络出版日期
作者单位点击查看
引用该论文: ZHANG Minjie,ZENG Minhang,LIU Lele,XIN Sensen,LI Moucheng. Pitting Behavior of Sensitized 444 Stainless Steel in Hot Tap Water[J]. Corrosion & Protection, 2021, 42(10): 8
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参考文献
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【11】秦丽雁, 张寿禄, 宋诗哲. 典型不锈钢晶间腐蚀敏化温度的研究[J]. 中国腐蚀与防护学报, 2006, 26(1):1-5.
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