Corrosion Inhibition of Copper by Selected Thiol Compounds

Electrochemical analysis of the corrosion inhibiting performance of two di-sulfide bases, the salts of 2,5 dimercapto-1,3,4 thiadiazole (DMTD) and 1-pyrrolidine dithiocarbamate (PYRR) in neutral NaCl for pure copper demonstrates that the compounds inhibit anodic and cathodic reactions and they exhib...

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Bibliographic Details
Main Authors: Qafsaoui, Wafaa, Kendig, Martin W., Takenouti, Hisasi, Huet, Francois
Format: Conference Proceeding
Language:English
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Summary:Electrochemical analysis of the corrosion inhibiting performance of two di-sulfide bases, the salts of 2,5 dimercapto-1,3,4 thiadiazole (DMTD) and 1-pyrrolidine dithiocarbamate (PYRR) in neutral NaCl for pure copper demonstrates that the compounds inhibit anodic and cathodic reactions and they exhibit synergy as a 1:1 mixture under open circuit conditions. The inhibitors are both anodically electro-active which may allow the irreversible formation of protective coatings. At open circuit the combination of the two inhibitors behaves synergistically and results in a corrosion exchange current density for Cu in 0.2 M NaCl of 0.03µA/cm2.
ISSN:1938-5862
1938-6737
DOI:10.1149/1.3040296