Surface treating agent for metal die castings

Abstract

The invention discloses a surface treating agent for metal die castings. The surface treating agent comprises, by weight, 100 parts of phosphoric acid, 15 to 25 parts of alkyd resin, 5 to 10 parts of urea resin, 15 to 20 parts of ammonium chloride, 100 to 120 parts of deionized water, 5 to 10 parts of a mixed alcohol solvent and 1 to 3 parts of a surface active agent. The mixed alcohol solvent is a mixed solvent of ethyl alcohol and ethylene glycol. By the adoption of the treating agent, the very good corrosion prevention and rust prevention effects on the metal die castings can be better achieved, cleaning of the surfaces of the castings can be enhanced through adding of the ammonium chloride, the bonding force of a corrosion prevention film layer can be enhanced through the cooperation of the alkyd resin and the urea resin, and the coating and attaching force is enhanced.

Description

technical field [0001] The invention relates to a surface treatment agent for metal die castings. Background technique [0002] The main purpose of metal surface treatment is to improve the corrosion resistance of metal materials. Using simple and safe methods for metal surface treatment has always been the goal pursued by people. However, most of the surface treatment agents used in the existing surface treatment methods are more harmful to the environment, such as containing cerium Se, chromium Cr, copper Cu, etc., and there are few surface cleaning agents specially for metal die castings on the market, and most of them only It can simply remove oil or rust, but cannot clean and remove aluminum alloy die-casting coatings. Traditional alloy surface cleaning agents have been difficult to meet the current requirements for cleaning the surface of aluminum alloy die castings. Although the surface treatment agent disclosed in the Chinese patent application number 201010147481...

AI Technical Summary

Problems solved by technology

However, most of the surface treatment agents used in the existing surface treatment methods are more harmful to the environment, such as containing cerium Se, chromium Cr, copper Cu, etc., and there are few surface cleaning agents specially for metal die castings on the market, and most of them only It can simply remove oil or rust, but cannot clean and remove aluminum alloy die-casting coatings

Traditional alloy surface cleaning agents have been difficult to meet the current requirements for surface cleaning of aluminum alloy die castings

Although the surface treatment agent disclosed in the Chinese patent application number 201010147481.0 is green and environmentally friendly, its surface treatment ability for metal castings is relatively poor, and the antirust and anticorrosion properties of the film layer need to be further improved