Stress Corrosion Cracking of Austenitic Stainless Steel in Chloride Environment
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Date
2015
Journal Title
Journal ISSN
Volume Title
Publisher
Faculty of Engineering, Ahmadu Bello University Zaria
Abstract
This study was carried out to assess the effect of applied potentials on stress corrosion cracking of Austenitic Stainless Steels (ASS), Type 304L in a potentiostatically controlled chloride environment at ambient temperature. The stress corrosion cracking tests were carried out on annealed ASS using a Slow Strain Rate Test (SSRT) technique in sodium chloride solution acidified with hydrochloric acid at ambient temperature. Post-mortem analyses of failed specimens were carried using optical microscopy. The study showed that plastic elongation, ultimate tensile strength and time to failure decrease as the applied potential increases during the slow strain rate test. The study showed that immunity of ASS to chloride SCC was improved when the electrochemical potential was maintained in the primary passive potential range. Post-mortem analysis of failed samples showed evidences of SCC and ductile failure on the fracture surface.
Description
Keywords
Failure, Passive film, Stress corrosion crack, Stainless Steels, SEM, SSRT
Citation
Ahmed, I. I., Alabi, A. G. F., Odusote, J. K., Aremu, I. N., Adebisi, J. A., Yahaya, T.,Talabi S. I. , Yahya, R. A., Lyon, S. B. (2015). Stress Corrosion Cracking of Austenitic Stainless Steel in Chloride Environment. Nigerian Journal of Engineering, 21 (2), 24-28.