Add time:07/29/2019         Source:sciencedirect.com

A new corrosion inhibitor (NCI) consisting of gluconate along with a relatively low amount of molybdate and nitrite was developed. A synergistic effect between molybdate and gluconate on the corrosion inhibition of C-steel was investigated. The polarization measurement indicates that the corrosion of C-steel in the presence of gluconate is thermodynamically and kinetically unfavorable as compared to that with molybdate alone. According to FIB-SEM, FTIR, and XPS experiments, an inhibition mechanism is proposed whereby the gluconate could bridge the molybdate and iron, which is responsible for the formation of the protective film against the corrosion of C-steel.

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