Comparison of Trends in Corrosion Rates of Various Metal Coupons in Soil Environment

DOI: 10.22607/IJACS.2024.1201008

Research  Article

ABSTRACT

ABSTRACT
The study aims to determine corrosion rates (CR) for mild steel (MS), stainless steel (SS304), and aluminium (Al) strip coupons buried in soil samples for various time durations using the weight loss method. Post-exposure analyses of corrosion coupons from all the periods showed that the highest CR for MS coupon retrieved from the soil sample was 159.20 mg dm-2 day-1. The lowest CR was observed in SS304 with 0.11 mg dm-2 day-1. The average CR for 6 hr in MS was 77.22, in SS304 is 5.065 and in Al was 13.26. For the highest time duration (96 h), CR in MS was 2.82, in SS304, it was 0.207, and in Al, it was 0.57 mg dm-2 day-1. Overall highest CR was observed in all samples of MS and the lowest CR was observed in SS304. It was observed that there was an inverse trend between weight loss and CR in the metal coupons and as the exposure period increased, CR values were decreased. This trend was observed in all three coupons and in all conditions, except for a few excursions which did not significantly affect the established trend.

Key words: Corrosion, Soil corrosion, Corrosion rate, Metal corrosion, Weightloss method

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Indian Journal of Advances in Chemical Science,

Volume: 12, Issue : 1,  January 2024

ISSN No.: 2320-0898 (Print); 2320-0928 (Electronic)