Metal material silane surface treating agent and preparation method thereof

Abstract

The invention discloses a metal material silane surface treating agent and a preparation method thereof. The silane surface treating agent is mixed liquid formed by mixing the following components: methyl triethoxysilane, film-forming resin, chitosan, ammonium molybdate, zinc dialkyl dithiophosphate, phytic acid, 2-n-octyl-4-isothiazolin-3-ketone, sodium dodecyl benzene sulfonate, polydimethylsiloxane, catechol, sodium carbonate and ethanol. The silane surface treating agent is prepared by using the methyl triethoxysilane as a main material and ethanol as a solvent; the materials are low in cost; and meanwhile, chitosan and a plurality of different auxiliaries are added into the raw materials, so that the treatment time and the treatment temperature of the treating agent are improved. A metal workpiece is treated by virtue of a silanization treating agent, a multi-acid film layer is formed on the surfaces of the metal workpiece, and the film layer has the characteristics of high adhesion, compactness, uniformity and low polarization current density and no cavity and rifts; and the production process is environment-friendly without pollution.

Description

technical field [0001] The invention relates to the field of metal surface treatment, in particular to a metal material surface silane treatment agent and a preparation method thereof. Background technique [0002] In the field of metal surface treatment, although traditional phosphate conversion and chromate passivation surface treatment technologies can achieve good results, the waste liquid discharged during the treatment process contains heavy metal ions such as zinc, manganese, nickel, chromium and nitrous acid. Carcinogens such as salt are very serious to environmental pollution, and metal surface silanization treatment technology is considered to be expected to replace phosphate conversion treatment and chromate passivation treatment because 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. Chemical treatment is the latest development dir...

AI Technical Summary

Problems solved by technology

[0002] In the field of metal surface treatment, although traditional phosphate conversion and chromate passivation surface treatment technologies can achieve good results, the waste liquid discharged during the treatment process contains heavy metal ions such as zinc, manganese, nickel, chromium and nitrous acid. Salt and other carcinogens are very serious environmental pollution, and metal surface silanization treatment technology is considered to be expected to replace phosphate conversion treatment and chromate passivation treatment because it does not involve substances harmful to the environment, the production process has low energy consumption, and the technology has a wide range of applications. Chemical treatment is the latest development direction of metal surface protection alone. In the existing technology, the film layer formed on the surface of metal workpieces treated with silane solution has uneven density, cavities, cracks, and weak adhesion to the metal body.