Volume 59, Issue 330, June 2023

Investigation of the corrosion resistance of cold-rolled low-carbon steel in an acidic medium

Olushola Bamidele Nenuwa^♦, Olugbenga Olabode Oke

Mineral & Petroleum Resources Engineering Department, The Federal Polytechnic, PMB 5351, Ado-Ekiti, Ekiti state, Nigeria

^♦Corresponding author
Mineral & Petroleum Resources Engineering Department, The Federal Polytechnic, PMB 5351, Ado-Ekiti, Ekiti state, Nigeria

ABSTRACT

The corrosion resistance of cold-rolled low-carbon steel in a hydrochloric acid medium was investigated. Low-carbon steel samples were cold-rolled at a percentage reduction range of 10% to 50% in increments of 10%. Some of the cold-worked samples were annealed at 700°C, held there for one hour and cooled in the furnace to room temperature. A corrosion test was carried out on the samples in 0.3M hydrochloric acid for 7 days using the weight loss method. Microstructural examination of the samples before and after the corrosion test was conducted using a metallurgical optical microscope. The results obtained indicated that as the degree of deformation increased, the corrosion resistance of the cold-rolled samples decreased. Stress relief annealing improved the corrosion resistance of the cold-rolled low-carbon steel sample. The microstructure obtained revealed that the low-carbon steel is majorly composed of ferrite with some patches of pearlite.

Keywords: Acidic medium, annealing, cold rolling, corrosion penetration rate, hydrochloric acid, low-carbon steel

Discovery, 2023, 59, e75d1256

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Published: June 2023