Aluminum alloy surface treatment agent and treatment method

Abstract

The invention discloses an aluminum alloy surface treatment agent and a treatment method. The aluminum alloy surface treatment agent is prepared from the following components in parts by weight: 40-60 parts of nitric acid, 8-14 parts of coconut fatty acid diethanolamine, 6-9 parts of fatty methyl ester ethoxylate, 1-4 parts of alkyl phenol ethoxylates, 18-25 parts of triethylene glycol, 4-7 parts of urotropine, 2-6 parts of triethanolamine oleic soap, 5-18 parts of gelatin, 9-18 parts of sodium chloride, 6-8 parts of sodium metasilicate, 5-8 parts of an organic acid agent, 1.5-3.5 parts of a preservative and 0.5-1.5 parts of a defoamer. The treatment method mainly comprises the following steps: high pressure washing; deoiling; aluminum alloy surface treatment agent smearing; washing. The aluminum alloy surface treatment agent can be cleaned after being used for once treatment on aluminum alloy, so that the treatment process is greatly simplified, the use of acid liquid is reduced, and the economy and the environment protection performance are improved.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to an aluminum alloy surface treatment agent and a treatment method. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. Aluminum will oxidize on the surface to form alumina, and these oxides must be removed beforehand during various surface treatments. The methods include manual rust removal, mechanical rust removal and sandblasting rust removal, etc., and the most common method is to use various alkali reagents to remove rust. When cleaning, different processes have different effects on the cleaning effect. [0003] At present, the cleaning process of aluminum alloy materials is mainly to use acidic cleaning agents whose main components are sulfuric acid, hydrochloric acid...

AI Technical Summary

Problems solved by technology

For aluminum alloy parts with a relatively complex structure, the more process steps, the more likely the cleaning solution will accumulate in the dead corners of the complex structure, and it is very easy to form corrosion spots with low chemical potential, where deep pitting is easy to form , leading to the failure of aluminum alloy parts