Surface treatment agent for improving corrosion resistance of metal basal body and preparation method thereof

Abstract

The invention belongs to the technical field of metal surface treatment, and in particular, relates to a surface treatment agent for improving corrosion resistance of a metal basal body and a preparation method thereof. The surface treatment agent comprises the raw materials of: cetyl ethyl hexanoate, nanometer boron fibers, zirconium carbonate, epoxy chloropropane, tetrabutyl ammonium fluoride, cetyltrimethylammonium chloride, rosin modified phenolic resins, n-octyl trimethoxy silane, hexafluoroacetylacetone, nitrified fly ash, and water. Compared with the prior art, the surface treatment agent has the following advantages: the cetyl ethyl hexanoate and the nanometer boron fibers are used for enhancing the film formability; the nitrified fly ash is added to uniformly distribute particles in a protection layer; the polarization current density is low; the corrosion inhibition effect of the protection film is reinforced; the overall corrosion resistance is improved; the formed film is about 600-800 m, and is thinner than a conventional phosphate film; the stability is better; the service life is prolonged; and the treatment cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to a surface treatment agent for improving the corrosion resistance of metal substrates and a preparation method thereof. Background technique [0002] The main parts of automobiles are made of steel and other materials. These materials need to be treated on their surface before use to improve their performance. In the field of metal surface treatment, traditional phosphate conversion and chromate passivation surface treatment Although the technology can achieve good results, the waste liquid discharged during the treatment process contains heavy metal ions such as zinc, manganese, nickel, chromium and carcinogens such as nitrite, which is very serious to environmental pollution, and the metal surface silanization treatment technology is due to It does not involve substances that are harmful to the environment, the production process has low energy consum...

AI Technical Summary

Problems solved by technology

[0002] The main parts of automobiles are made of steel and other materials. These materials need to be treated on their surface before use to improve their performance. In the field of metal surface treatment, traditional phosphate conversion and chromate passivation surface treatment Although the technology can achieve good results, the waste liquid discharged during the treatment process contains heavy metal ions such as zinc, manganese, nickel, chromium and carcinogens such as nitrite, which is very serious to environmental pollution, and the metal surface silanization treatment technology is due to It does not involve substances that are harmful to the environment, the production process has low energy consumption, and the technology has a wide range of applications. It is considered to be expected to replace phosphate conversion treatment and chromate passivation treatment. It is the latest development direction of metal surface protection alone. In the existing technology, silane solution The film layer formed on the surface of the treated metal workpiece has problems such as uneven density, voids, cracks, etc., and the phenomenon of weak adhesion to the metal body, so it should be further improved