Show simple item record

dc.contributor.authorWang, Yushu
dc.date.accessioned2016-08-22T12:21:35Z
dc.date.available2016-08-22T12:21:35Z
dc.date.created2015-08
dc.date.issued2015-07-27
dc.date.submittedAugust 2015
dc.identifier.urihttp://hdl.handle.net/1853/55553
dc.description.abstractThe effect of thiosulfate on different aspects of pitting corrosion in chloride containing environments as well as the interaction between thiosulfate and stainless steels were studied in this research. Cyclic potentiodynamic polarization tests showed that the presence of thiosulfate hinders the repassivation of the pits. Preferential dissolution of ferrite phase was found on 2101. A statistical analysis of the metastable pitting events monitored by chronoamperometry revealed that thiosulfate promotes pit initiation and stabilizes the growth of metastable pits. Microstructure influenced the pitting corrosion behavior of 2101. The repassivation of metastable pits were closely related to the arrest of pit growth by phase boundaries. Mechanical scratch tests, designed to study the repassivation kinetics and interactions between a bare metal and thiosulfate, showed the effect of potential and microstructure on the growth of pitting in presence of thiosulfate. Interaction of alloying elements such as chromium, nickel, and molybdenum with thiosulfates were also evaluated. XPS showed formation of reduced sulfur species on the surface of pure alloying elements, and provided information regarding the overall corrosion process. Based on these results, a mechanism of pitting in the presence of thiosulfate was proposed.
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherGeorgia Institute of Technology
dc.subjectCorrosion
dc.subjectPitting
dc.subjectDuplex stainless steel
dc.subjectThiosulfate
dc.titleEffect of thiosulfate on passivity and corrosion properties of stainless steels
dc.typeDissertation
dc.description.degreePh.D.
dc.contributor.departmentMaterials Science and Engineering
thesis.degree.levelDoctoral
dc.contributor.committeeMemberSingh, Preet M.
dc.contributor.committeeMemberGokhale, Arun M.
dc.contributor.committeeMemberAlamgir, Faisal
dc.contributor.committeeMemberBottomley, Lawrence A.
dc.contributor.committeeMemberDeng, Yulin
dc.date.updated2016-08-22T12:21:35Z


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record