CHROMIUM-FREE PASSIVATOR, ALUMINUM PRODUCT AND SURFACE PASSIVATION PROCESS THEREFOR

摘要

A chromium-free passivator is used for surface pretreatment of an aluminum product and comprises the following components in parts by weight per 1000 parts by weight of the chromium-free passivator: 5-30 parts of cerium sulfate, 2-20 parts of ferric phosphate, 2-10 parts of isobutanol, 2-10 parts of boric acid and the balance of water. Also disclosed are an aluminum product and a surface passivation process therefor.