Influence of Organic Coating Thickness on Electrochemical Impedance Spectroscopy Response

被引：11

作者：

de Paula, Amanda Suellen ^{[1
]}

Aroeira, Barbara Mitraud ^{[1
]}

Souza, Lucas Henrique de Oliveira ^{[2
]}

da Cruz, Alisson Cristian ^{[1
]}

Fedel, Michele ^{[3
]}

da Silva, Brunela Pereira ^{[1
]}

Cotting, Fernando ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, Dept Chem Engn, BR-31270901 Belo Horizonte, MG, Brazil

[2] Nucl Technol Dev Ctr, BR-31270901 Belo Horizonte, MG, Brazil

[3] Univ Trento, Dept Ind Engn, Via Sommar n 9, I-38123 Trento, Italy

来源：

COATINGS | 2024年 / 14卷 / 03期

关键词：

electrochemical impedance spectroscopy; organic coating; corrosion; IN-SITU AFM; CARBON-STEEL; CORROSION PROTECTION; EIS; STRENGTH; BEHAVIOR;

D O I：

10.3390/coatings14030285

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 mu m, 80 mu m, and 100 mu m. 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 mu m thickness demonstrated greater resistance to corrosion compared to the other tested thicknesses.

引用

页数：11

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