Recommend design of filler metal to minimize carbon steel weld metal preferential corrosion in CO2-saturated oilfield produced water
By Lu, Yongxin; Jing, Hongyang; Han, Yongdian; Feng, Zhicao; Xu, Lianyong
Published in Applied Surface Science
NULL
2016
Abstract
Abstract The paper proposes a recommend design for the alloying elements in the filler metal to minimize preferential weld corrosion of carbon steel. The tensile and corrosion resistance properties of the weld metal are considerably improved by using a filler metal containing alloying elements according to the recommended design. Analysis of the morphology and composition of corrosion products on weld metals showed that the common weld metal suffered severe localized corrosion, whereas the weld metal with the alloying elements exhibited uniform corrosion. Based on these results, a tentative mechanism of {CO2} corrosion resistance for both weld metals has been proposed.
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