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Critical potential for propagation of stress corrosion cracking
National Institute for Materials Science, Japan.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science. National Institute for Materials Science, Japan.
2008 (English)In: Critical Factors in Localized Corrosion 6, in Honor of Professor Shibata, 2008, no 52, 255-268 p.Conference paper (Refereed)
Abstract [en]

Critical potentials for initiation and propagation of stress corrosion cracking, SCC, were investigated with creviced round bar specimens in various concentrations of NaCl solutions at 80°C. After critical potentials for crevice corrosion, ER,CREV, were measured, two types of SCC tests were performed. The specimen was kept at given potential and then the stress of 20kg/mm2 was applied in the Test-1. In the pretreatment in the Test-2, the specimen was kept at a potential higher than ER, CREV to initiate crevice corrosion. After the pretreatment, the specimen was kept at the test potential and the stress of 20kg/mm2 was applied. It was confirmed that ER,CREV is the critical potential for initiation of both crevice corrosion and SCC After SCC initiation condition was determined, stepwise polarization measurement with stress was performed to determine the repassivation potential for the crack propagation, ER,CRACK. The ER,CRACK values were lower than ER,CREV and they became lower with increasing test duration, and reached to the specific value. It indicates that the stress corrosion crack works as severer crevice.

Place, publisher, year, edition, pages
2008. no 52, 255-268 p.
, ECS Transactions, ISSN 1938-5862 ; 16
Keyword [en]
Crevice corrosion, Initiation and propagation, NaCl solution, Polarization measurements, Pre-Treatment, Repassivation potential, Round bar specimens, SCC initiation, SCC test, Specific values, Stress corrosion crack, Test duration, Aluminum corrosion, Cracks, Electrochemical corrosion, Residual stresses, Sodium chloride, Testing, Stress corrosion cracking
National Category
Corrosion Engineering
URN: urn:nbn:se:kth:diva-153998DOI: 10.1149/1.3229974ScopusID: 2-s2.0-77649111683ISBN: 9781615676453OAI: diva2:762121
Critical Factors in Localized Corrosion 6, in Honor of Professor Shibata - 214th ECS Meeting; Honolulu, HI; United States; 12 October 2008 through 17 October 2008

QC 20141110

Available from: 2014-11-10 Created: 2014-10-10 Last updated: 2014-11-10Bibliographically approved

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