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Understanding the role of silane pretreatments in an organic coating system. Part 1: corrosion performance and interfacial property

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Abstract

This work aimed at understanding the role of silane pretreatment layer in an organic coating system. The study consists of two parts. In the first part, the anticorrosion performance and interfacial property of silane-pretreated epoxy coatings were studied. The results showed that pretreatment with functional 3-glycidoxypropyl-trimethoxysilane (GPTMS) strongly improves the adhesion of epoxy-coated AA2024-T3 aluminum alloy due to the high interfacial compatibility between silane and epoxy coatings and that pretreatment with nonfunctional bis-1,2-[triethoxysilyl]ethane (BTSE) remarkably reduces the adhesion to the alloy because of low compatibility. Nevertheless, the BTSE film provides higher resistance to corrosion than the GPTMS-pretreated coating system, because the former is more hydrophobic and thicker.

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Acknowledgment

This work was supported by the National Key R&D Program of China (2017YFB1200800), NSF of China (Nos. 51371159 and 51671174) and Natural Science Foundation of Zhejiang Province (LZ17E010001).

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Authors and Affiliations

  1. Department of Chemistry, Zhejiang University, Hangzhou, 310027, China

    Xiao-Xin Wang, Yun-Qing Cao, Hong-Li Fu & Ji-Ming Hu

  2. College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, China

    Mei-Yan Jiang

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Correspondence to Ji-Ming Hu.

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Wang, XX., Cao, YQ., Fu, HL. et al. Understanding the role of silane pretreatments in an organic coating system. Part 1: corrosion performance and interfacial property. J Coat Technol Res 16, 881–893 (2019). https://doi.org/10.1007/s11998-018-00164-4

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