Coiled aluminum strip surface treatment process

Abstract

The invention discloses a coiled aluminum strip surface treatment process. The coiled aluminum strip surface treatment process comprises the following steps of conducting chemical polishing treatmenton an aluminum strip; cleaning the polished aluminum strip; conducting cooling and passivation treatment on the cleaned aluminum strip; cleaning the passivated aluminum strip; conducting oxidation treatment on the cleaned aluminum strip; cleaning the aluminum strip subjected to oxidation treatment; conducting secondary passivation treatment on the cleaned aluminum strip to form a passivation filmon the surface of an oxidation film; cleaning the passivated aluminum strip to remove acid liquor on the aluminum strip; conducting high-temperature hole sealing on the cleaned aluminum strip to sealup holes in the oxidation film and form a protective film on the surface of the aluminum strip; dragging the coiled aluminum strip subjected to high-temperature hole sealing and winding the aluminum strip to form a finished coiled aluminum strip. The coiled aluminum strip has the functions of insulation, acid and alkali resistance and ageing resistance. The formed coiled aluminum strip is manufactured into aluminum products at the construction site, and then the aluminum products can be installed for use. The problem that aluminum strips are manufactured into aluminum products first, and thenthe aluminum products are subjected to surface treatment and are not convenient to transport in the prior art is solved.

Description

technical field [0001] The invention relates to a process for treating the surface of an aluminum strip, in particular to a surface treatment process for a reel aluminum strip. Background technique [0002] In the prior art, when preparing aluminum alloy doors and windows, in the usual method, the aluminum strip is first stamped into a corresponding molded part, and then further surface layer pretreatment and coating are carried out on the molded part, that is, the aluminum strip is prepared first, Then the aluminum strip is cut to length and shaped into molded parts, and then the molded parts are surface treated. For example, in the production of aluminum alloy door pieces, the aluminum strip is first cut to length and shaped into a door piece, and then traditionally polished and oxidized. Using the existing preparation process, every ton of product needs to consume 3-5 kg ​​of aluminum. In addition, 220 kg of sulfuric acid, 20 kg of nitric acid, and 60 kg of phosphoric ac...

AI Technical Summary

Problems solved by technology

The invention forms a layer of protective film on the surface of the aluminum strip, which has the functions of insulation, acid and alkali resistance, and anti-aging. The reel aluminum strip formed by the invention can be installed and used after being processed into aluminum products at the construction site, which solves the problem of the prior art The problem of inconvenient transportation exists in the surface treatment of aluminum strips after forming aluminum products. The waste materials can be reused in the production process, which greatly reduces the discharge and waste of liquid materials such as waste acid. The loss rate of aluminum strips is low, and it is environmentally friendly. Advantages of energy saving and low consumption