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  DOI Prefix   10.20431


 

International Journal of Mining Science
Volume 3, Issue 2, 2017, Page No: 1-8

Corrosion of Roofing Sheets in a Simulated Environment

J.E.O.Ovri

Department of Materials and Metallurgical Engineering,Federal University of Technology, Owerri, Nigeria

Citation :J.E.O.Ovri, Corrosion of Roofing Sheets in a Simulated Environment International Journal of Mining Science 2017,3(2) : 1-8

Abstract

An acid rain condition was simulated by mixing 0.5MHCl, 0.5 MH2S04 and 0.5MHNO3. Selected roofing sheets (galvanized steel, aluminum/zinc alloy(Cameroon zinc) and Aluminum alloy (Alumaco) were exposed to the simulated environment and to the various acids. The corrosion in these environments were monitored for 28-day at an interval of 7-day using the weight loss method. The results obtained indicated that the corrosion rates for the roofing sheets for the various environments were: galvanized steel (5.32 - 19.71mpy (HCL),9.85-39.77 mpy(H2S04), 9.03-13.69 mpy (HNO3), and 5.72-22.33 mpy (simulated environment), aluminum/zinc alloy,6.42-17.32 mpy (HCL), 4.04-7.71 mpy (H2S04), 7.82-7.94 mpy(HN03),3.10-3.14 mpy (simulated environment) and aluminum alloy (Alumaco ),4.57-15.49 (HCL), 2.57-3.46 mpy(H2S04), 4.79 -6.35mpy(HNO3) and 2.32-3.45mpy (simulated environment). The galvanized steel corroded more in the simulated environment (5.72-22.33 mpy), closely followed by the aluminum/ zinc alloy which had 3.10-3.14 mpy. The aluminum alloy had the least corrosion 2.32-3.45 mpy. It could be concluded that the aluminum alloy appeared to be a more attractive material for roofing in the simulated environment which replicates an acid rain condition.


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