Assessing the corrosion protection property of coatings loaded with corrosion inhibitors using the real-time atmospheric corrosion monitoring technique

Xiaoxue Wang; Lulu Jin; Jinke Wang; Rongqiao Wang; Xiuchun Liu; Kai Gao; Jingli Sun; Yong Yuan; Lingwei Ma; Hongchang Qian; Dawei Zhang

doi:10.1007/s12613-024-2860-5

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Xiaoxue Wang, Lulu Jin, Jinke Wang, Rongqiao Wang, Xiuchun Liu, Kai Gao, Jingli Sun, Yong Yuan, Lingwei Ma, Hongchang Qian, and Dawei Zhang, Assessing the corrosion protection property of coatings loaded with corrosion inhibitors using the real-time atmospheric corrosion monitoring technique, Int. J. Miner. Metall. Mater.,(2025). https://doi.org/10.1007/s12613-024-2860-5

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Xiaoxue Wang, Lulu Jin, Jinke Wang, Rongqiao Wang, Xiuchun Liu, Kai Gao, Jingli Sun, Yong Yuan, Lingwei Ma, Hongchang Qian, and Dawei Zhang, Assessing the corrosion protection property of coatings loaded with corrosion inhibitors using the real-time atmospheric corrosion monitoring technique, Int. J. Miner. Metall. Mater.,(2025). https://doi.org/10.1007/s12613-024-2860-5

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Research Article

Assessing the corrosion protection property of coatings loaded with corrosion inhibitors using the real-time atmospheric corrosion monitoring technique

+ Author Affiliations

Corresponding authors:
Lingwei Ma    E-mail: mlw1215@ustb.edu.cn

Hongchang Qian    E-mail: qianhc@ustb.edu.cn

Dawei Zhang    E-mail: dzhang@ustb.edu.cn
Received: 16 December 2023; Revised: 8 February 2024; Accepted: 22 February 2024; Available online: 23 February 2024

Abstract

Abstract

The atmospheric corrosion monitoring (ACM) technique has been widely employed to track the real-time corrosion behavior of metal materials. However, limited studies have applied ACM to the corrosion protection properties of organic coatings. This study compared a bare epoxy coating with one containing zinc phosphate corrosion inhibitors, both applied on ACM sensors, to observe their corrosion protection properties over time. Coatings with artificial damage via scratches were exposed to immersion and alternating dry and wet environments, which allowed for monitoring galvanic corrosion currents in real-time. Throughout the corrosion tests, the ACM currents of the zinc phosphate/epoxy coating were considerably lower than those of the blank epoxy coating. The trend in ACM current variations closely matched the results obtained from regular electrochemical tests and surface analysis. This alignment highlights the potential of the ACM technique in evaluating the corrosion protection capabilities of organic coatings. Compared with the blank epoxy coating, the zinc phosphate/epoxy coating showed much-decreased ACM current values that confirmed the effective inhibition of zinc phosphate against steel corrosion beneath the damaged coating.
- atmospheric corrosion monitoring technology;
- corrosion inhibitor;
- coating;
- carbon steel;
- corrosion protection

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