Assessing the impact of Zn-MgO-xCn Ternary Coatings on A36 Low Carbon Steels for Oil and Gas Pipeline Applications

Abstract

Issues regarding corrosion have become a substantial source of expenditure for oil and gas industries.Apart from that, oil spillages resulting from leakages in pipelines pose severe environmental challenges, such as pollution and fire outbreaks.A36 LCS is commonly used for fabricating oil and gas pipelines, due to its availability and cost.The aim of this study was to deposit Zn-MgO-xCn CC on A36 LCS substrates, to improve their CRS in acidic media, through the ED route.W corrosion determination technique was used for determining the developed coatings CR.The CC surface morphology and phase evolution were determined by OPM, SME and X-RD.The results showed that all the developed CC offered lower CR values than that of the A36 LCS substrate, which was 5.4392 mm/y.Sample D4 (20 g Zn and 20 g MgO-Cn) had the lowest CR value of 0.7199 mm/y, corresponding to a coating E of 86% on the substrate.Finally, among the developed coatings, sample E1 (Zn and 20 g MgO) gave the highest CR values of 2.1030 mm/y, with an E value of 61%.The study showed that the CC were able to form protective barriers on the substrate in the corrosive media.