Pitting corrosion characterization of wrought Stellite alloys in Green Death Solution with immersion test and extreme value analysis model

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DOIResolve DOI: http://doi.org/10.1007/s11665-014-0952-5
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TypeArticle
Journal titleJournal of Materials Engineering and Performance
ISSN1544-1024
Volume23
Issue5
Pages17181725; # of pages: 8
SubjectCarbides; Corrosion resistance; Pitting; Solid solutions; Stellite; Value engineering; Corrosion behavior; Corrosion characterization; Extreme value analysis; Gumbel distribution; Measuring instruments; Pit depths; Service conditions; Stellite alloy; Alloys
AbstractThis article presents a study of the corrosion behavior of two wrought Stellite alloys, Stellite 6B, and Stellite 6K, in Green Death solution, utilizing the extreme value analysis (EVA) model, which is a statistics tool developed based on the Gumbel distribution. Green Death solution a typical oxidized testing solution used in industry for assessing the corrosion resistance of materials. The data of maximum pit depths are obtained from the immersion tests on these alloys for various exposure periods. The top ten maximum pit depths in each specimen surface after the immersion test are measured using a surface texture and contour measuring instrument. These data are the input parameters of the EVA model and the outcomes of the model are the extreme values (minimum thickness) required for the alloys under a given service condition. It is shown that Stellite 6K, which contains higher carbon content but smaller-size carbides, exhibits better corrosion resistance in regard to the extreme value. The results and mechanisms of Stellite 6B and Stellite 6K in Green Death solution corrosion are discussed. © 2014 ASM International.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Aerospace (AERO-AERO)
Peer reviewedYes
NPARC number21272228
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Record identifierff99ea32-485c-4ad8-8276-9532c7b81659
Record created2014-07-23
Record modified2016-05-09
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