Corrosion Resistance of Cast Duplex Stainless Steels Grades ASTM A890 1B and 3A in Electrolytes Containing Chloride, Carbon Dioxide and Thiosulfate
Journal of Materials Engineering and Performance, ISSN: 1544-1024, Vol: 32, Issue: 13, Page: 5980-5997
2023
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New Chemicals and Chemistry Findings from Federal University Cariri Described (Corrosion Resistance of Cast Duplex Stainless Steels Grades Astm A890 1b and 3a In Electrolytes Containing Chloride, Carbon Dioxide and Thiosulfate)
2022 NOV 23 (NewsRx) -- By a News Reporter-Staff News Editor at Chemicals & Chemistry Daily Daily -- Research findings on Chemicals and Chemistry are
Article Description
The combined effects of concentration of chloride, carbon dioxide and thiosulfate on the oxide film formation and metal dissolution have been investigated for two cast duplex stainless steels, by electrochemical measurements. A comparative study was made between the alloys considering the effects of Cu addition in steel 1B. Different levels of hardness were obtained by solution treatment and aging at 450, 500, 550 and 600 °C for 1 h, in order to confirm the possibility of performing heat treatments capable of hardening the material, with minimal deleterious effects on corrosion resistance. According to the results, Cu improves the corrosion resistance in the media containing either NaCl only or CO-saturated NaCl. Furthermore, the addition of thiosulfate to the CO-saturated NaCl solution was beneficial for both steels, with a more pronounced effect for steel 3A. The effects on the localized and selective corrosion attack susceptibility were also investigated.
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Springer Science and Business Media LLC
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