Title

Degradations of Type 422 Stainless Steel in Aqueous Environments

Document Type

Article

Publication Date

4-15-2006

Publication Title

Materials Science and Engineering A

Volume

421

Issue

1-2

First page number:

290

Last page number:

297

Abstract

The susceptibility of Type 422 stainless steel (UNS S42200) to stress corrosion cracking (SCC) and localized corrosion was determined in neutral and acidic aqueous solutions at ambient and elevated temperatures. No failures were observed in the neutral solution at constant load. SCC testing by the slow-strain-rate technique revealed reduced ductility, time-to-failure and true failure stress due to the combined effect of elevated temperature and lower pH. These parameters were further reduced due to the cathodic charging. The localized corrosion studies using the cyclic potentiodynamic polarization technique showed pits and crevices in all specimens. Metallographic and fractographic evaluations showed secondary cracks along the gage section, and a combination of ductile and brittle failures at the primary fracture face of the tested specimen, respectively, depending upon the test environment.

Keywords

422 stainless steel; Acids; Hydrogen effect; Localized corrosion; Solution (Chemistry); Stainless steel – Corrosion; Stainless steel – Ductility; Stainless steel – Stress corrosion; Stress corrosion cracking

Disciplines

Civil and Environmental Engineering | Engineering | Materials Science and Engineering | Mechanical Engineering | Mechanics of Materials | Metallurgy | Structural Materials

Language

English

Permissions

Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.

Identifier

DOI: http://dx.doi.org/10.1016/j.msea.2006.01.094

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