Duplex stainless steels (DSS) offer a desirable combination of austenitic and ferritic characteristics and are widely utilised in petrochemical, pulp and paper, and other industries. They outperform standard austenitic stainless steels in terms of corrosion resistance, particularly chloride stress corrosion and chloride pitting corrosion, as well as strength. They are a good contender for the offshore oil and gas industry because of these factors. Weight loss measurements, electrochemical corrosion tests, and a slow strain rate test were used to explore the stress corrosion behaviour of duplex stainless steel in a 3.5 percent sodium chloride solution in this work (SSRT). After 1700 hours of weight reduction, there was no substantial corrosion. In a 3.5 percent NaCl solution, an electrochemical polarisation test revealed a consistent corrosion rate of 0.008 mpy and passivity in the range of 735–950 mV Vs SSC. In a 3.5 percent NaCl solution, a comparison of the slow strain rate test for duplex stainless steel revealed a similar stress-strain behaviour. The stress-strain behaviour of mild steel, on the other hand, exhibited a loss of roughly 25% elongation. The excellent corrosion and, in particular, pitting resistance of DSS was thought to be responsible for its ductility.
Author (s) Details
Muhammad Shahid
School of Chemical and Materials Engineering, National University of Sciences and Technology, Islamabad, Pakistan.
Ammer K. Jadoon
British Petroleum Ltd, UK.
Qanita Tayyaba
School of Chemical and Materials Engineering, National University of Sciences and Technology, Islamabad, Pakistan.
Hina Farooq
School of Chemical and Materials Engineering, National University of Sciences and Technology, Islamabad, Pakistan.
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