某铜冶炼烟气制酸装置耐酸蝶阀的腐蚀失效分析
Corrosion Failure Analysis of an Acid Corrosion Resistant Butterfly Valve in a Copper Smelter Acid Plant
摘 要
通过现场工况调研、化学成分分析、组织形貌观察和电化学测试等手段分析了耐酸碟阀腐蚀的原因。结果表明：局部腐蚀穿孔和腐蚀坑主要是由铸件缺陷所引起的，而阳极保护系统引起的电解腐蚀是导致严重均匀腐蚀的主要原因。
腐蚀
电解腐蚀
失效分析
butterfly valve
corrosion
electrolytic corrosion
failure analysis
Abstract
The corrosion failure of acid resistant butterfly valve was analyzed by means of in-situ work condition investigation, chemical composition analysis, microstructure and corrosion morphology observation as well as electrochemical testing. The results show that the localized corrosion perforation and pits were due to casting defects. The main reason for heavy general corrosion was electrolytic corrosion because of anodic protection system.
中图分类号 TG172 DOI 10.11973/fsyfh-201702015
所属栏目 失效分析
基金项目
收稿日期 2015/9/25
修改稿日期
网络出版日期
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引用该论文: OUYANG Ming-hui,LIU Huan-an,YE Ji-xuan. Corrosion Failure Analysis of an Acid Corrosion Resistant Butterfly Valve in a Copper Smelter Acid Plant[J]. Corrosion & Protection, 2017, 38(2): 155
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参考文献
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【2】刘焕安,叶际宣. 高温浓硫酸用XDS不锈钢板材的研究[J]. 硫酸工业,2004(1):21-27.
【3】LI Y,IVES M B,COLEY K,et al. Corrosion of nickel-containing stainless steel in concentrated sulphuric acid[J]. Corrosion Science,2004,46(8):1969-1979.
【4】IVES M B,LI Y,COLEY K S. Passivity of nickel-containing stainless steels in concentrated sulphuric acid[M]//MARCUS P,MAURICE V. Passivation of Metals and Semiconductors,and Properties of Thin Oxide Layers. Amsterdam:Elsevier Science,2006:23-28.
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