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Advances in Materials Science and Engineering
Volume 2012, Article ID 235028, 8 pages
http://dx.doi.org/10.1155/2012/235028
Research Article

Stress Corrosion Cracking of Steel and Aluminum in Sodium Hydroxide: Field Failure and Laboratory Test

1Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, Skudai, 81310 Johor, Malaysia
2Department of Refrigeration and Air Conditioning, Politeknik Negeri Bandung, Bandung 40012, Indonesia
3Faculty of Maritime Studies and Marine Science, University Malaysia Terengganu, 21030 Kuala Terengganu, Malaysia

Received 30 December 2011; Accepted 30 January 2012

Academic Editor: Pavel Lejcek

Copyright © 2012 Y. Prawoto et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Through an investigation of the field failure analysis and laboratory experiment, a study on (stress corrosion cracking) SCC behavior of steel and aluminum was performed. All samples were extracted from known operating conditions from the field failures. Similar but accelerated laboratory test was subsequently conducted in such a way as to mimic the field failures. The crack depth and behavior of the SCC were then analyzed after the laboratory test and the mechanism of stress corrosion cracking was studied. The results show that for the same given stress relative to ultimate tensile strength, the susceptibility to SCC is greatly influenced by heat treatment. Furthermore, it was also concluded that when expressed relative to the (ultimate tensile strength) UTS, aluminum has similar level of SCC susceptibility to that of steel, although with respect to the same absolute value of applied stress, aluminum is more susceptible to SCC in sodium hydroxide environment than steel.