HAI

Surface treatment of aluminum with electrolytic, organic and inorganic coatings; organic, inorganic and electrolytic dying of aluminum; mechanical and chemical surface pretreatment of aluminum, namely, chemical etching, pickling, deoxidation and burnishing, mechanical grinding, brushing and burnishing, grit blasting with glass, stainless steel, sand, plastic and korund, vibration deburring, keramo burnishing, ball burnishing and dry burnishing; mechanical, chemical, and electrical polishing of aluminum; silkscreen printing of aluminum