The Corrosion Behaviors of Heat-Treated SAE 8620 Steels

Abstract:

The corrosion behaviors, including the immersion corrosion, electro-chemical corrosion, stress-corrosion fracture, of heat-treated SAE 8620 steels have been investigated. Experimental results show that the 400°C􀊳 tempered specimen is only susceptible to local attack of pitting corrosion and can exhibit an excellent corrosion resistance during the static immersion and electro-chemical tests in a 3.5% NaCl solution. The tensile strength and elongation of the normalized and 300~500°C tempered specimens will be reduced when tested in NaCl solutions, especially at a higher testing temperature. The normalized specimen can inhibit effectively the crack-growth under constant loading and the 300~500°C tempered specimens have a sequence of crack-growth rate as 300°C > 400°C > 500°C.

• Periodical: Materials Science Forum (Volumes 575-578)
• Pages: 1190-1198
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.575-578.1190
• Online since: April 2008
• Authors: Steven Hong, H.C. Lin, Y. Lee, T.S. Lian, L.Y. Tseng, K.M. Lin
• Keywords: Corrosion Behaviour, Heat Treatment, Microstructure, SAE 8620 Steel, Stress Corrosion

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