Comparative study of organic inhibitors of coppercorrosion
| Autor: | G.P. Cicileo, Blanca Margarita Rosales, F.E. Varela, Jorge Roberto Vilche |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Aqueous solution
Chemistry General Chemical Engineering Metal ions in aqueous solution Inorganic chemistry chemistry.chemical_element General Chemistry Electrochemistry Copper Corrosion Metal Corrosion inhibitor chemistry.chemical_compound X-ray photoelectron spectroscopy visual_art visual_art.visual_art_medium General Materials Science |
| Zdroj: | Corrosion Science. 41:1359-1375 |
| ISSN: | 0010-938X |
| Popis: | The corrosion behaviour of copper in the presence of two organic inhibitors that belongto the oxime group (salycilaldoxime (SO) and benzoinoxime (BO)) has been investigated inneutral aqueous NaCl solutions. Weight-loss measurements and electrochemical impedancespectroscopy (EIS) were applied to analyse the effect of the organic compounds on the corrosioninhibition of copper. Morphology of the copper substrate after corrosion in the presence andabsence of the inhibitors was examined using scanning electron microscopy (SEM). Fouriertransform infrared (FTIR) and X-ray photoelectron (XPS) spectroscopies were used tocharacterise the surface film. A polymeric Cu (II)-inhibitor complex that totally covered thecopper surface was identified, exhibiting strong corrosion inhibition. In the first stage, copperoxides are formed adhering to the metallic surface. The inhibitory mechanism on the Cudissolution process was related to both the chelating effect of Cu (II)ions close to the coppersurface, which avoids the action of aggressive Cl− or OH− ions in solution, and the blockingaction of the organic complex surface film. |
| Databáze: | OpenAIRE |
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