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Journal of Materials Engineering and Performance

Erschienen in:

11.11.2019

Study of Wave-Absorbing Coating Failure by Electrochemical Measurements

verfasst von: Xinkun Wang, Zhiwei Shi, Binshi Xu, Shicheng Wei, Weiping Li

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 11/2019

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Abstract

The absorption properties of wave-absorbing coatings can easily fail; therefore, a layer of corrosion-resistant topcoat is often added to the surface to increase the service life of the absorbing coating. In this study, we compare the changes in samples without or with a topcoat, namely fluorinated polyurethane, at 25 °C with a NaCl solution and at 35 °C with a neutral salt spray. Morphological characterization and composition analysis show that the topcoat can indeed greatly improve the corrosion resistance of the samples, but the absorption of the coatings still decreases in a short time. The reasons for this are indicated by electrochemical impedance spectroscopy. For the samples without a topcoat, the corrosion of the wave-absorbing coatings results in the failure of wave absorption. For the samples with a topcoat, it is likely that the state of the interface between the topcoat and absorbing coatings leads to the decline of the resistance of the wave-absorbing coatings, causing them to fail quickly.

Vorheriger Artikel Characteristics and Tribological Behaviors of TiAlN/Cr-Ni Composite Coatings at Elevated Temperatures

Nächster Artikel Tensile Properties of a Cast Al-Si-Mg Alloy with Reduced Si Content and Cr Addition at High Temperature

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Titel: Study of Wave-Absorbing Coating Failure by Electrochemical Measurements
verfasst von: Xinkun Wang
Zhiwei Shi
Binshi Xu
Shicheng Wei
Weiping Li
Publikationsdatum: 11.11.2019
Verlag: Springer US
Erschienen in: Journal of Materials Engineering and Performance / Ausgabe 11/2019
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-019-04433-0

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