Stress corrosion cracking behavior of selected stainless steels in saturated potash brine solution at different temperatures

The susceptibility of UNS S31603, UNS S32550, UNS S32760, and UNS S32205 to stress corrosion cracking (SCC) in saturated potash brine (KCl) solution was studied using the slow strain rate testing (SSRT) method. Two strain rates (10−6 s-1 and 5 × 10-7 s-1) and three temperatures (25, 50, and 80 °C) w...

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Bibliographic Details
Published in:	Corrosion science Vol. 178; p. 109025
Main Authors:	Serafim, Felipe M.F., Alabi, Wahab O., Oguocha, Ikechukwuka N.A., Odeshi, Akindele G., Evitts, Richard, Gerspacher, Regan J., Ohaeri, Enyinnaya G.
Format:	Journal Article
Language:	English
Published:	Amsterdam Elsevier Ltd 01-01-2021 Elsevier BV
Subjects:	Brines Critical pitting temperature Ductile fracture Ductile-brittle transition Duplex stainless steels Potash Potassium carbonate Raman spectroscopy Scanning electron microscopy Slow strain rate Slow strain rate testing Stable pits Stainless steels Stress corrosion cracking Scanning electron microscopy Critical pitting temperature Stress corrosion cracking Slow strain rate testing Raman spectroscopy Stable pits Stainless steels
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Summary:	The susceptibility of UNS S31603, UNS S32550, UNS S32760, and UNS S32205 to stress corrosion cracking (SCC) in saturated potash brine (KCl) solution was studied using the slow strain rate testing (SSRT) method. Two strain rates (10−6 s-1 and 5 × 10-7 s-1) and three temperatures (25, 50, and 80 °C) were used. UNS S31603 steel showed significant susceptibility to SCC, the severity of which increased with temperature, while the duplex steels exhibited considerable resistance to SCC in KCl solution for all the test conditions. Examination of surfaces of failed specimens suggests a mixture of ductile and brittle fractures.
ISSN:	0010-938X 1879-0496
DOI:	10.1016/j.corsci.2020.109025