Aluminum alloy non-phosphorus nitrogen-free polishing solution and aluminum alloy surface treatment method

Abstract

Provided is an aluminum alloy non-phosphorus nitrogen-free polishing solution and an aluminum alloy surface treatment method. The aluminum alloy non-phosphorus nitrogen-free polishing solution is prepared from, by mass concentration, 1200 g / L-1700 g / L sulfuric acid, 5 g / L-25 g / L aluminum ions, 2 g / L-30 g / L metal salt, a 0.1 g / L-2 g / L interfacial agent and the balance water. According to the aluminum alloy non-phosphorus nitrogen-free polishing solution, phosphoric acid and nitric acid are not adopted, phosphorus and nitrogen are not included, pollution related to phosphorus and nitrogen is notcaused to the environment, and therefore the environmental protection property is good. In addition, after an aluminum alloy is polished with the aluminum alloy non-phosphorus nitrogen-free polishingsolution, the brightness of the aluminum alloy can be improved well.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to an aluminum alloy phosphorus-free and nitrogen-free polishing solution and an aluminum alloy surface treatment method. Background technique [0002] In the existing aluminum alloy polishing treatment, sulfuric acid-phosphoric acid or sulfuric acid-phosphoric acid-nitric acid is usually used as the polishing liquid, which contains phosphorus and some also contain nitrogen, so the waste liquid is easily polluted to the environment after being discharged. With the increasingly stringent national environmental protection policies, it also poses a huge challenge to the aluminum alloy surface treatment industry. Traditional chemical polishing uses a large amount of phosphoric acid and nitric acid, which will not only cause serious pollution to the operating environment, but also cause a large amount of phosphorus, nitrogen, etc. The discharge of elements into the water ...

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Problems solved by technology

[0002] In the existing aluminum alloy polishing treatment, the polishing liquid used is usually sulfuric acid-phosphoric acid or sulfuric acid-phosphoric acid-nitric acid, which contains phosphorus and some also contain nitrogen, so the waste liquid is easily polluted to the environment after being discharged.

With the increasingly stringent national environmental protection policies, it also poses a huge challenge to the aluminum alloy surface treatment industry. Traditional chemical polishing uses a large amount of phosphoric acid and nitric acid, which will not only cause serious pollution to the operating environment, but also cause a large amount of phosphorus, nitrogen, etc. The discharge of elements into the water body causes eutrophication of the water body and destroys the ecological balance

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