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Effect of pearlite on stress corrosion cracking of carbon steel in fuel-grade ethanol

Effect of pearlite on stress corrosion cracking of carbon steel in fuel-grade ethanol AbstractThe selective dissolution of ferrite phase from the pearlite was studied in fuel-grade ethanol (FGE) to understand how it affects the stress corrosion cracking (SCC) mechanism of carbon steel in FGE. It was shown that microgalvanic coupling occurs between ferrite and cementite phases of the pearlite, leading to localized corrosion, which affects the SCC mechanism. The intergranular SCC mechanism stops at the pearlite, and the selective dissolution promotes the transgranular SCC mechanism. Cathodic polarization curves were measured for pure iron and cementite exposed to various FGE conditions. According to the results, cementite phase is, in most cases, a more favorable cathode in FGE. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Corrosion Reviews de Gruyter

Effect of pearlite on stress corrosion cracking of carbon steel in fuel-grade ethanol

Corrosion Reviews , Volume 36 (3): 13 – Jun 27, 2018

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Publisher
de Gruyter
Copyright
©2018 Walter de Gruyter GmbH, Berlin/Boston
ISSN
2191-0316
eISSN
2191-0316
DOI
10.1515/corrrev-2017-0072
Publisher site
See Article on Publisher Site

Abstract

AbstractThe selective dissolution of ferrite phase from the pearlite was studied in fuel-grade ethanol (FGE) to understand how it affects the stress corrosion cracking (SCC) mechanism of carbon steel in FGE. It was shown that microgalvanic coupling occurs between ferrite and cementite phases of the pearlite, leading to localized corrosion, which affects the SCC mechanism. The intergranular SCC mechanism stops at the pearlite, and the selective dissolution promotes the transgranular SCC mechanism. Cathodic polarization curves were measured for pure iron and cementite exposed to various FGE conditions. According to the results, cementite phase is, in most cases, a more favorable cathode in FGE.

Journal

Corrosion Reviewsde Gruyter

Published: Jun 27, 2018

References