Salt spray resistant metal surface silane treatment agent and preparation method thereof

Abstract

The invention discloses a salt spray resistant metal surface silane treatment agent, which is a mixed solution prepared from the following components. Per liter of the mixed solution comprises the following components by weight (g): 25-30 of propyltrimethoxy silane, 15-25 of vinyltrimethoxy silane, 4-5 of sodium hexametaphosphate, 1-2 of tetrahydrofuran, 5-7 of hexamethylphosphoric triamide, 3-4 of citric acid, 6-7 of sorbitol, 2-4 of a film-forming agent, and the balance water. The treatment process of the salt spray resistant metal surface silane treatment agent produced in the invention generates no dreg, the treatment time is short, and the control is simple and convenient. Being free of harmful heavy metal ions, the salt spray resistant metal surface silane treatment agent is safe and environment-friendly, and can form a silane coating having excellent corrosion resistance with a metal surface, thus prolonging the service life of metals.

Description

Technical field [0001] The invention mainly relates to a treatment agent, in particular to a metal surface silane treatment agent resistant to salt spray. Background technique [0002] With the maturity of metal surface treatment technology, traditional phosphate conversion and chromate passivation surface treatment technologies have gradually been replaced by environmentally friendly and energy-saving silanization treatment technologies due to environmental pollution and easy harm to the human body. However, the current silane Most chemical treatments rely solely on the film-forming properties of silane, so that the film formed on the surface of the metal workpiece treated with the silane solution has uneven density, voids, cracks, and weak adhesion to the metal body. Summary of the invention [0003] The purpose of the present invention is to make up for the defects of the prior art and provide a salt spray resistant metal surface silane treatment agent and a preparation...

AI Technical Summary

Problems solved by technology

[0002] With the maturity of the metal surface treatment process, the traditional phosphate conversion and chromate passivation surface treatment technology is gradually replaced by the environmental protection and energy-saving silanization treatment technology due to factors such as environmental pollution and easy harm to the human body. However, the current silane Most of the chemical treatment is simply relying on the film-forming properties of silane, so that the film layer formed on the surface of the metal workpiece treated with the silane solution has uneven density, voids, cracks, and weak adhesion to the metal body.