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铝合金门窗基体的预处理

铝合金窗资讯

铝合金基体表面常常附有油脂、灰尘及氧化皮等杂物，必须在制备涂层前尽可能的清除干净，否则不但影响涂层与金属基体之间的结合力，而且在固化过程中氧化皮上的涂层会跟随氧化皮一起脱落，影响涂层的完整性。因此，必须对基体进行适当的表面预处理。

铝合金门窗基体的预处理

一般来说，如果基体表面太光滑则不利于机械咬合，因此，基体表面的适当粗化有利于提高涂层的粘结强度。但是如果过于粗糙，表面凸凹不平时，油污、灰尘等污物容易在凹痕处易残留，在涂刷时易存在空隙，空隙容易包裹空气，使粘结强度降低。

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