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普通碳钢表面经过喷砂处理后,采用氧——乙炔火焰或者电孤的方法喷涂上一层锌或者铝再加封孔剂封闭,这是目前公认的普碳钢构件防止腐蚀的最为有效的方法。这是因为一方面锌、铝的电极电位均较铁负可起到阴极保护的作用,更主要是基于形成较好的钝化膜保护层。然而锌、铝涂层受环境中PH值的影响较大,处于不同PH值环境中的钢铁构件的外表面,特别是盛装不同高温(约200℃左右)介质的储罐的内表面是喷锌还是喷铝合适,一直是设计者选择喷涂层首先碰到的疑难问题。为了进一步确定锌、铝喷涂层的适用范围,我们研究了在特定喷涂工艺下,锌、铝喷涂层在不同PH值环
Ordinary carbon steel surface after blasting, the use of oxygen - acetylene flame or the method of spraying a layer of zinc or aluminum plus sealing agent, which is now recognized as the most common carbon steel components to prevent corrosion the most effective way . This is because, on the one hand, the electrode potential of zinc and aluminum can both play a role of cathodic protection compared with that of iron, and more importantly, it is based on the formation of a better passivation film protective layer. However, the zinc and aluminum coatings are greatly affected by the pH in the environment. The outer surfaces of the steel components in different pH environments, especially the tanks containing different high temperature media (about 200 ° C.), are zinc sprayed Spray aluminum or suitable, has always been the designer to choose the first layer of spray difficult problems encountered. In order to further determine the scope of application of zinc, aluminum spray coating, we studied in a specific spraying process, zinc, aluminum spray coating at different PH ring