期刊
PROGRESS IN ORGANIC COATINGS
卷 159, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2021.106401
关键词
Organic coating; Degradation; AC-DC-AC; Corrosion; EIS
资金
- National Key Research and Development Program of China [2017YFB0702100]
- Science and Technology Planning Project of Fujian Province [2018H6017]
- National Natural Science Foundation of China [51731008, 51671163]
- Fujian Province University Key Laboratory of Green Energy and Environment Catalysis Fund [FJ-GEEC201805]
The study demonstrated that the modified alternate anodic and cathodic AC-DC-AC method is more reliable in evaluating the protection performance of an acrylic varnish paint coating, by rationalizing the acceleration of coating degradation without altering the mechanism of corrosion damage. The corrosion damage and mechanism of the acrylic varnish paint coating/Q215 steel system were discussed in detail based on the results obtained from the modified AC-DC-AC tests.
To improve the alternating current-direct current-alternating current (AC-DC-AC) coating evaluation technique, the single DC step in the AC-DC-AC method was replaced with a combination of cathodic and anodic polarization in this work. The modified alternate anodic and cathodic AC-DC-AC method experimentally proved to more reliably evaluate the protection performance of an acrylic varnish paint coating than the conventional AC-DC-AC test, as it could more rationally accelerate the coating degradation process without changing the mechanism of the coating corrosion damage. The corrosion damage and mechanism of the acrylic varnish paint coating/Q215 steel system was discussed in detail based on the results obtained from the modified AC-DC-AC tests.
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