Aluminum coil non-contact continuous anodizing technique

The invention discloses an aluminum coil non-contact continuous anodizing technique. The aluminum coil non-contact continuous anodizing technique comprises the steps of aluminum coil unwinding, alkali erosion treatment, environment-friendly glaring treatment, anodizing treatment, hole sealing treatment and winding. Anodizing is conducted in an oxidation tank with the concentration of sulfuric acid being 180-230 g/L, the concentration of Al3+ being lower than 30 g/L and the concentration of an oxidation additive being 10-20 ml/L and an electric conductive tank containing sulfuric acid of which the concentration is 150-230 g/L and a conductive additive of which the concentration is 30-50 ml/L, the oxidation temperature is controlled to be 19-23 DEG C, the electric current density is controlled to be 1.0-5 A/dm , continuous anodizing time is 8-20 min, and a uniform oxidation film is obtained; a traditional single oxidation tank is replaced with the electric conductive tank and the oxidation tank, an aluminum coi