Effect of Sensitization Treatment on Corrosion Properties in Austenitic Stainless Steel 304

Abstract:

Chromium depletion in AISI304 stainless steel can lead to intergranular corrosion due to temperature conditions and degree of deformation, and consequently to materials failure. The aim of this work is to study the effect of sensitization treatment on the corrosion resistance in AISI304 stainless steel after solution heat treatment at 1,000°C. Sensitization treatments were carried out at 670°C for 1 h, 2h, 5h and 10h in the electrical furnace. The intergranular corrosion resistance of the sensitized specimens was evaluated by double loop electrochemical potentiokinetic reactivation test. The microstructure of the specimens before and after the corrosion tests was observed through optical and scanning electron microscope. Solution treatment shows the dual structure, however, aging for 5 hours depicts the ditch structure. The ratio of current density increased as a function of aging time resulted in increase in the degree of sensitization.

• Periodical: Materials Science Forum (Volume 857)
• Pages: 232-236
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.857.232
• Online since: May 2016
• Authors: Chung Seok Kim*, Seung Jae Moon, Won Sik Kong
• Keywords: AISI304, Corrosion, Sensitization, Solution, Stainless Steel

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