Anodic oxidation production process of special aluminum strip for motor vehicle license plate

Abstract

The invention discloses an anodic oxidation line and anodic oxidation production technology for a special aluminium strip for a motor vehicle license plate. The technology comprises the steps of unwinding, pinch-conveying, tensioning, oil removing, water washing, glossing, water washing, oxidization, electric conduction, water washing, hole sealing, water washing, blow-drying, shearing, deviation correction and winding in sequence; a NaOH water solution is added in an oil removal tank, the addition quantity is 20-35 g / L, and the oil removal time is 1-3 min; water washing is performed twice; HNO3 is added in a glossing tank, the addition quantity is 300-400 g / L, and the glossing time is 1-3 min; after glossing, water washing is performed once and pure water washing is performed once; H2SO4 and NaCL are added into an oxidation tank, wherein the content ratio of H2SO4 to a liquid is 20%, the content ratio of NaCL to the liquid is 0.02%, the temperature of the oxidation tank is controlled at 20-22 DEG C, and the oxidation time is 30-60 min; and after being oxidized, the aluminium strip enters an electric conduction tank, HAc, H2cRo4 and glycerol are added in the electric conduction tank, the electric current is controlled at 1-2.5 A / dm<2>, and the voltage is controlled at 16-24 V. In conclusion, the anodic oxidation line and the anodic oxidation production technology have the advantages of convenience in operation, high operating efficiency, good product performance, small environmental pollution, short oxidation time and the like.

Description

technical field [0001] The invention belongs to the technical field of anodic oxidation production technology of metal materials, and in particular relates to an anodic oxidation production technology of special aluminum strips for motor vehicle license plates. Background technique [0002] The process of using aluminum or aluminum alloy products as anodes, placing them in an electrolyte solution for electrification, and using electrolysis to form an aluminum oxide film on the surface is called anodic oxidation treatment of aluminum and aluminum alloys. After anodic oxidation treatment, an oxide film of several microns to hundreds of microns can be formed on the surface of aluminum. Compared with the natural oxide film of aluminum alloy, its corrosion resistance, wear resistance and decoration have been significantly improved and enhanced. However, the existing common anodizing line production equipment cannot continuously oxidize aluminum, resulting in inconsistent product...

AI Technical Summary

Problems solved by technology

However, the existing common anodizing line production equipment cannot continuously oxidize aluminum, resulting in inconsistent product performance and low work efficiency