Metal surface silane treating agent containing aqueous nano-zinc oxide and preparation method thereof

Abstract

The invention discloses a metal surface silane treating agent containing aqueous nano-zinc oxide. The metal surface silane treating agent is characterized by being a mixture solution prepared from the following ingredients in parts by weight (gram) in each liter of the mixture: 20-30 parts of propyl trimethoxy silane, 30-40 parts of aminopropyl triethoxy silane, 100-200 parts of aqueous nano-zinc oxide, 2-4 parts of propylene glycol, 2-4 parts of zirconium fluoride, 1-2 parts of ethylene glycol monobutyl ether, 0.8-1 parts of sodium monofluorophosphate, 2-3 parts of ethylene diamine tetramethylene risedremate sodium, 1-2 parts of urea, 0.6-0.8 parts of crylic acid, 0.4-0.6 parts of carboxymethyl cellulose and the balance of water. The metal surface silane treating agent has the advantages that a silane coating layer formed on the surface of a metal after the metal is treated by using the surface silane treating agent provided by the invention has excellent corrosion resistance performance, the service life of the metal is prolonged, and by combining the propyl trimethoxy silane and the aminopropyl triethoxy silane, a compact and solid coating layer is formed on the surface of the metal.

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 containing aqueous nanometer zinc oxide material 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...

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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. Sodium diamine tetramethylene phosphonate is a cathodic corrosion inhibitor. Compared with inorganic polyphosphate, its corrosion inhibition rate is 3-5 times higher. It can be miscible with water, non-toxic and pollution-free, chemical stability and resistance Good temperature resistance, good scale inhibition effect even at 200°C