Influence of Organic Coating Thickness on Electrochemical Impedance Spectroscopy Response
Source abstract
Abstract
Electrochemical Impedance Spectroscopy (EIS) is a non-destructive and powerful technique for characterizing corrosion systems, allowing for the evaluation of surface reaction mechanisms, mass transport, kinetic evolution, and corrosion levels of materials. This study aims to analyze the progression of corrosion using EIS, with a focus on the influence of organic coating thickness. For this purpose, layers of high-purity epoxy paint were applied to carbon steel plates with thicknesses of 50 µm, 80 µm, and 100 µm. During the research, a direct correlation was observed between coating thickness and corrosion resistance, emphasizing the importance of identifying the optimal thickness for each type of coating. Additionally, it was found that thicker coatings may experience electrode penetration due to the tensions generated during deposition, resulting in cracks between the layers, while thinner coatings allow electrolyte penetration as they do not provide adequate protection to the base steel. Therefore, the 80 µm thickness demonstrated greater resistance to corrosion compared to the other tested thicknesses.
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Research context
OpenAlex topics: Corrosion Behavior and Inhibition · Conducting polymers and applications · Analytical Chemistry and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemical Engineering, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
Nuclear Technology Development Center, Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
Department of Industrial Engineering, University of Trento, Via Sommarive n. 9, 38123 Trento, Italy
Funding
CAPES—Brazil (Coordination for the Improvement of Higher Education Personnel) · CNEN—Brazil (The National Nuclear Energy Commission) · Nacional Council for Scientific and Technological Development
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