specular reflectivity of aluminum 6063

In anodizing done for decorative purposes the object of etching is to transform the metallic luster of the aluminum surface into a uniform matt finish which diffuses reflected light uniformly in all directions. This is always perfectly done by warm solutions of sodium hydroxide base solutions. Different factors can affect final matt finish in etching process. These include alloying elements, extrusion conditions; extrusion dies surface conditions, aging conditions, time of etching in etching bath as well as etching bath chemical composition and temperature. By controlling and studying the effect of each parameter, we will be able to achieve desired gloss after etching is Done. This investigation can be helpful in anodizing industry. In this article, we will discussed the mechanism of etching and the effects of alloying elements ,especially iron and magnesium, in 6063 alloy , aging parameters and etching bath conditions on the speculars reflectivity after etching process

کلیدواژه ها:

Etching ، affect ، alloy element ، aging ، specular reflectivity