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Materials 2017, 10(4), 397; doi:10.3390/ma10040397

Failure Mechanisms of the Coating/Metal Interface in Waterborne Coatings: The Effect of Bonding

1
Institute for advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
2
Aerospace Research Institute of Materials and Processing Technology, Beijing 100076, China
3
Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Jérôme Chevalier
Received: 27 February 2017 / Revised: 1 April 2017 / Accepted: 6 April 2017 / Published: 9 April 2017
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Abstract

Waterborne coating is the most popular type of coating, and improving its performance is a key point of research. Cathodic delamination is one of the major modes of failure for organic coatings. It refers to the weakening or loss of adhesion between the coating and substrate. Physical and chemical characteristics of coatings have been studied via scanning electron microscopy (SEM), atomic force microscopy (AFM), contact angle measurements, Fourier transform infrared spectroscopy (FTIR), and secondary ion mass spectrometry (SIMS). Early heterogeneous swelling at the metal-coating interface in non-defective coated metals was elucidated using frequency-dependent alternating-current scanning electrochemical microscopy. Two types of coatings (styrene-acrylic coating and terpolymer coating) were compared. The effects of thickness, surface roughness, and chemical bonding on cathodic delamination were investigated. View Full-Text
Keywords: waterborne coating; scanning electrochemical microscopy (SECM); delamination waterborne coating; scanning electrochemical microscopy (SECM); delamination
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Wan, H.; Song, D.; Li, X.; Zhang, D.; Gao, J.; Du, C. Failure Mechanisms of the Coating/Metal Interface in Waterborne Coatings: The Effect of Bonding. Materials 2017, 10, 397.

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