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Molecules. 2020 Jan 21;25(3). pii: E439. doi: 10.3390/molecules25030439.

Poly (Vinyl Butyral-Co-Vinyl Alcohol-Co-Vinyl Acetate) Coating Performance on Copper Corrosion in Saline Environment.

Author information

1
Department of Chemistry, Faculty of Sciences, University of Craiova, 107i Calea Bucuresti, 200478 Craiova, Romania.
2
Doctoral School of Sciences, Faculty of Sciences, University of Craiova, A.I. Cuza no.13, 200585 Craiova, Romania.
3
Department of Physics, Faculty of Sciences, University of Craiova, A.I. Cuza no.13, 200585 Craiova, Romania.

Abstract

Poly (vinyl butyral-co-vinyl alcohol-co-vinyl acetate) named further PVBA was investigated as a protective coating for copper corrosion in 0.9% NaCl solution using electrochemical measurements such as, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization associated with atomic force microscopy (AFM). The PVBA coating on the copper surface (Cu-PVBA) was modeled in methanol containing PVBA. Its inhibitory properties against corrosion was comparatively discussed with those of the copper sample treated in methanol without polymer (Cu-Me) and of untreated sample (standard copper). A protective performance of PVBA coating of 80% was computed from electrochemical measurements, for copper corrosion in NaCl solution. Moreover, AFM images designed a specific surface morphology of coated surface with PVBA, clearly highlighting a polymer film adsorbed on the copper surface, which presents certain deterioration after corrosion, but the metal surface was not significantly affected compared to those of untreated samples or treated in methanol, in the absence of PVBA.

KEYWORDS:

adsorption; atomic force microscopy; coatings; corrosion tests; poly (vinyl butyral-co-vinyl alcohol-co-vinyl acetate)

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