Corrosion Behaviour of Heat Treated Rolled Medium Carbon Steel in Marine Environment
- 1 Ajaokuta Steel Company Limited, Ajaokuta Steel City, Kogi State, Nigeria
- 2 Metallurgical and Materials Engineering Department, Federal University of Technology,Akure, Ondo State, Nigeria.
- 3 Metallurgical and Materials Engineering Department, Federal University of Technology,Akure, Ondo State, Nigeria.
Abstract
Investigation were carried out to study the corrosion behaviour of heat treated rolled medium carbon steel and as-rolled medium carbon steel in sodium chloride medium. The as-rolled medium carbon steel was heated to a temperature of 830℃ to completely austenize it and water quenched; it was reheated to the ferrite-austenite dual phase region at a temperature of 745℃ below the effective Ac 3 point. The steel was then rapidly quenched in water and tempered at a temperature of 480℃. The corrosion behaviour of the steel in marine medium (NaCl) was studied by weight loss measurement. The weight loss is between 0.02g-0.11g for the as-rolled steel and 0.01g – 0.013g for the heat treated steel. The results obtained showed that the as-rolled medium carbon steel is more susceptible to corrosion than the heat treated rolled medium carbon steel.
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