Qiong Li, Zhiyong Liu, Lin Lu, Du Cuiwei, Song Wang, Xiaogang Li
{"title":"Failure Analysis of ZG06Cr13Ni4Mo Stainless Steel Hydraulic Turbine Blades","authors":"Qiong Li, Zhiyong Liu, Lin Lu, Du Cuiwei, Song Wang, Xiaogang Li","doi":"10.11903/1002.6495.2013.197","DOIUrl":null,"url":null,"abstract":"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.","PeriodicalId":10727,"journal":{"name":"Corrosion Science and Protection Technology","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2014-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Corrosion Science and Protection Technology","FirstCategoryId":"1087","ListUrlMain":"https://doi.org/10.11903/1002.6495.2013.197","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Chemical Engineering","Score":null,"Total":0}
引用次数: 1
Abstract
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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