利用电化学阻抗谱对有机硅烷偶联剂改性丙烯酸系乳胶涂料的抗蚀性进行了评价。考察了偶联剂的种类、添加量、固化温度和处理方法对抗腐蚀性能的影响。结果表明,先用偶联剂甲基丙烯酰丙基三甲氧基硅烷(A174)对金属表面进行预处理,然后在120℃固化能大大提高这类涂料的防护性能。
The corrosion prevention ability of acrylic latex coatings could be enhanced by introducing silane coupling agent into coating/metal interface. The effects of coupling agent type, its contents, curing temperature and application procedure on the anticorrosion behavior were investigated. Electrochemical impedance spectroscopy(EIS) and adhesive strength measurements were used to assess the corrosion prevention performance of the modified coatings. The results showed that the steel substrate pretreated with methacryloxypropyl trimethoxysilane(A174) and cured at 120℃ exhibited excellent anticorrosion performance, which could be attributed to the formation of a new interfacial layer with high hydrophobicity and strong adhesive strength.
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