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经喷砂处理的基体表面,微观呈凹凸不平,涂装时首先填充凹部,然后覆盖凸部。适当的粗糙度有利于涂层与基体的结合。但粗糙度不宜过大,否则涂层厚度分布太宽,部分波峰部位的涂层过薄,达不到规定的临界厚度,造成涂层提前破坏。粗糙度过低会降低涂层与基体表面的结合力,涂
After blasting the surface of the substrate, the microscopic was uneven, when painting, the concave portion was filled first, and then the convex portion was covered. Appropriate roughness is conducive to the coating and the substrate combination. But the roughness should not be too large, otherwise the coating thickness distribution is too wide, part of the coating at the peak area is too thin, less than the required critical thickness, resulting in premature coating damage. Too low a roughness will reduce the adhesion of the coating to the surface of the substrate