ZG06Cr13Ni4Mo不锈钢水轮机叶片失效分析

Q4 Chemical Engineering

Corrosion Science and Protection Technology Pub Date : 2014-05-29 DOI:10.11903/1002.6495.2013.197

Qiong Li, Zhiyong Liu, Lin Lu, Du Cuiwei, Song Wang, Xiaogang Li

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引用次数: 1

摘要

通过对ZG06Cr13Ni4Mo不锈钢水轮机叶片的宏观形貌、微观形貌和能谱分析，分析了叶片在使用多年后出现的严重局部腐蚀，找出了腐蚀的原因。结果表明:点蚀的产生与表层局部塑性变形密切相关，溃疡状腐蚀主要发生在焊缝修补区;更具体地说，这种情况下的点蚀是由硫酸盐还原菌(SRB)引起的微生物腐蚀，而叶片在加工和焊接过程中产生的表面缺陷可能进一步加剧点蚀和溃疡样腐蚀。

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Failure Analysis of ZG06Cr13Ni4Mo Stainless Steel Hydraulic Turbine Blades

Severe localized corrosion of ZG06Cr13Ni4Mo stainless steel hydraulic turbine blades after years of service is analyzed by means of examinations of macro-morphology, micro-morphology and energy dispersion spectrum(EDS) to identify the causes of corrosion. The results indicated that the initiation of pitting was closely related to the localized plastic deformation of surface layer and the ulcer-like corrosion was located mainly in the weld repaired area. More specifically, the pitting corrosion in this case was attributed to microbiological corrosion induced by sulfate reducing bacteria(SRB), and the surface defects of blade generated during machining and welding might further enhance the pitting and ulcer-like corrosion.

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来源期刊

Corrosion Science and Protection Technology Chemical Engineering-Chemical Engineering (all)

CiteScore

0.60

自引率

0.00%

发文量

2399