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Potassium ethyl xanthate as corrosion inhibitor for copper in acidic chloride solutions

2004; Elsevier BV; Volume: 47; Issue: 7 Linguagem: Inglês

10.1016/j.corsci.2004.08.015

1879-0496

M. Scendo,

Analytical Chemistry and Sensors

The effect of potassium ethyl xanthate (EtX−) on the anodic dissolution of copper in acidic sodium chloride solutions was studied using voltammetry on a rotating disc electrode (RDE) and electrochemical quartz crystal microbalance (EQCM) techniques. The compound used at 5 × 10−3 M concentration acts as a strong inhibitor against copper dissolution. The inhibitory action increases with an increase in pH of the solution. The influence of EtX− on the spontaneous dissolution of copper was also investigated. The EQCM measurements show that an increase in pH was accompanied by an increase of inhibition efficiencies of EtX−.