Metal surface silane treating agent and preparation method thereof

Abstract

The invention discloses metal surface silane treating agent. The treating agent is characterized by preparing mixed liquid by the following components, and the weight parts (g) of all components in each liter of mixed liquid are as follows: 35 to 45 parts of 3-glycidyl ether oxygroup propyl trimethoxy silane, 35 to 45 parts of vinyl tri(beta-methoxyl ethyoxyl)silane, 100 to 180 parts of aqueous nano-zinc oxide materials, 4 to 5 parts of 2-methyl-1, 3-propylene glycol, 2 to 4 parts of polyethylene glycol, 2 to 2.5 parts of zirconium fluoride, 2 to 3 parts of dimethyl sulfoxide, 1 to 2 parts of urea, 0.3 to 0.6 part of benzotriazole, 0.3 to 0.5 part of monoammonium phosphate and the rest amount of water. The treating agent has the advantages that after the metal is treated by the surface silane treating agent, a silane coating layer formed on the metal surface has excellent corrosion resistance, and the service life of the metal is prolonged; and as propyl trimethoxy silane is combined with aminopropyl triethoxy silane for use, the compact and firm coating layer can be formed on the metal surface.

Description

technical field [0001] The invention mainly relates to a metal surface silane treatment agent and a preparation method thereof, in particular to a metal 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 treatmen...

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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.