Aluminum alloy polishing additive and preparation method thereof

Abstract

The invention discloses an aluminum alloy polishing additive and a preparation method thereof. The aluminum alloy polishing additive comprises, by weight, 5-15 parts of sodium tungstate, 0.1-0.2 part of polyethylene glycol, 65-84 parts of aqueous solutions, 5-10 parts of ferric sulfate and 5-12 parts of sodium persulfate. According to the additive, water is used as a solvent, the raw materials are easy to obtain, the components and the preparation process are quite simple, and production cost is greatly lowered; the additive can be added into phosphoric acid and sulfuric acid to be used for polishing, no harmful gas is generated in the polishing process, and the environment is not polluted; two-acid polishing brightness on the market can be achieved, and a mirror effect is achieved.

Description

technical field [0001] The invention relates to the polishing of aluminum alloys, in particular to an aluminum alloy polishing additive and a preparation method thereof. Background technique [0002] Aluminum alloy chemical polishing is a chemical processing method that uses its selective self-dissolution in acidic or alkaline electrolyte solutions to reduce its surface roughness and pH value. This polishing method has the advantages of simple equipment, not limited by the size of the workpiece, high polishing speed and low processing cost. [0003] The traditional polishing fluid for aluminum alloy has the following disadvantages: the nitric acid decomposes too fast, a large amount of yellow smoke is seriously polluted, the processing cost is expensive, and it is easy to oxidize and cause loss of gloss over time. The traditional chemical polishing of aluminum and aluminum alloys usually adopts the "three-acid" process, namely phosphoric acid, sulfuric acid and nitric acid....

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the current aluminum alloy polishing has the problems of high cost and insufficient brightness