金属表面硅烷试剂防腐涂层性能测试

硅烷试剂(SilaneAgent,SA)直接用作金属表面预处理时,可与金属表面的氧化层形成化学键合而改变金属表面的性质,特别对提高难上漆的金属表面的附着力具有令人瞩目的效果;因其具有无污染、处理件耐蚀性好、与涂层结合牢固等特点,目前正成为硅烷试剂应用的新兴领域1～3].通过有效的测试手段对体系进行监测和判断是开发利用该技术的前提,有关这方面报道极少,本文在工艺技术研究的基础上提出和建立了相应的分析测试方法.SA和SA(CR);乙醇(工业级95%);醋酸(CR):36%使用液;其它试剂均为CR级;防锈水(亚硝酸盐型)和防锈水(过氧化氢型)按工业常…

Behavior of Corrosion Resisting Silane Coating on Metallic Surface

The corrosion resistance behavior of silane agents(SA) for iron based substrate have been studied. A series of detection methods were used simutaneously for effective analysis and monitoring the hydrolysis process of SA films. It consists of the on line FTIR spectroscopy, conductivity measurement, XPS(for structure and component analysis), elliptical spectroscopy(for film thickness analysis) and electrochemical method(for corrosion examination). The results showed that the rational thickness of the SA films was about 82 nm and there were chemical bondings between the iron substrate and SA film, which produces a large amount of silanols in hydrolysis.