Abstract
It has recently been reported that the association of benzotriazole with potassium ethyl xanthate (BTA + KEX) exhibits good inhibitive properties against the corrosion of copper in aqueous solutions containing 0.1 M NaCl [ 1,2]. Moreover, it has been shown that this selective composition appears to be one of the best of its type for avoiding the localized corrosion of copper [2]. These previous studies were mainly preliminary investigations intended to establish the experimental conditions for a synergistic inhibiting effect for copper corrosion, whilst this communication reports new results related to the formation of a surface complex and the nature of the passive film formed on copper. The effectiveness of the resulting protective film against corrosion in environments which do not contain a BTA + KEX reservoir is also investigated.
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