Efficient and long-lasting corrosion inhibition mechanisms of disodium 4-dodecyl-2,4′-oxydibenzenesulfonate on copper in 0.5 wt% ammonia water: experimental and theoretical calculations

The corrosion inhibition behavior and mechanism of disodium 4-dodecyl-2,4′-oxydibenzenesulfonate (DDPBDS) on copper in ammonia water were examined through both experimental methodologies and theoretical computations. The findings indicated that DDPBDS exhibited the capability to concurrently suppress the electrochemical corrosion reactions of copper and was an efficient, durable corrosion inhibitor . At the concentration of 0.1 g/L, DDPBDS demonstrated an impressive corrosion inhibition efficiency of 99.92 % on copper during the initial soaking period, and after soaking for 15 days, its corrosion inhibition efficiency still reached 99.89 %. DDPBDS formed a uniform, dense and hydrophobic protective layer on the copper surface through physicochemical mixed adsorption, which exhibited an adsorption arrangement resembling a skateboard configuration, hindering the copper corrosion .