Electrochemical Evaluation of Three Zinc-Rich Paints on Carbon Steel Substrates Exposed to 3.5% NaCl

Coatings are the most common method of corrosion control based on isolating a metal from the aggressive environment. They also represent one of the most effective tools to combat the degradation of metallic materials. This research work evaluates using electrochemical techniques, three paint systems...

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Bibliographic Details
Published in:ECS transactions 2021-01, Vol.101 (1), p.343-350
Main Authors: Ataxca, Corintia Guadalupe, Martinez, Daniel, Galicia Aguilar, Gonzalo, Chavez-Rosales, Rosario, Orozco Cruz, Ricardo
Format: Article
Language:English
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Summary:Coatings are the most common method of corrosion control based on isolating a metal from the aggressive environment. They also represent one of the most effective tools to combat the degradation of metallic materials. This research work evaluates using electrochemical techniques, three paint systems rich in zinc: Zerovoc (Z1), ZRC Galvilite (Z2), and Zinga (Z3), on carbon steel substrates. As a first step, the different coatings were applied. Subsequently, the characterization was carried out using direct current (DC) and alternating current (AC) electrochemical techniques; Linear Polarization Resistance (LPR) and Electrochemical Impedance Spectroscopy (EIS). The systems were evaluated in a period of 30 days of immersion in 3.5% NaCl obtaining as a result a degradation mechanism and the corrosion rate for each paint. Based on the results, it was determined that the ZRC Galvilite (Z2) system represented the best protection performance.
ISSN:1938-5862
1938-6737
DOI:10.1149/10101.0343ecst