The surface treatment of acid-base sand process carries out the surface treatment of aluminum profile by means of alkali etching and acid etching process, and then carries out coloring and oxidation.
The function of alkali sand is to level the mechanical grain of aluminum substrate to a certain extent, so as to produce uniform sand particles and remove the oil on the surface of aluminum substrate.
The function of acid sand is to form a layer of sand particles on the surface of aluminum substrate to decorate aluminum substrate, so as to achieve the effect of beautiful elimination of luster.