Aqueous silane treatment agent for improving metal surface protection performance

Abstract

The invention discloses an aqueous silane treatment agent for improving metal surface protection performance, and relates to a silane treatment agent for the metal surface pretreatment. The aqueous silane treatment agent provided by the present invention comprises vinyltriacetoxysilane, bis-(trimethoxysilylpropyl)amine, lanthanum nitrate and deionized water. The aqueous silane treatment agent provided by the present invention has characteristics of high corrosion resistance, high storage stability, high adhesion, low cost, easy popularization and application, and the like. The aqueous silane treatment agent can be widely applicable for the metal surface pretreatment, and is the ideal treatment agent for improving the metal surface protection performance.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to a silane treatment agent for metal surface pre-treatment. Background technique [0002] During the transportation, storage and use of most metal products, the surface is prone to various forms of corrosion, especially the atmospheric corrosion that forms various rust spots. These corrosions will seriously affect the quality of the metal and the quality of the products made of the metal. quality. At the same time, the corrosion of metal surfaces has brought huge economic losses. In my country, according to statistics, the annual economic losses caused by metal surface corrosion account for about 4% of the gross national product, and the corrosion losses even exceed the sum of losses caused by fire, wind disasters and earthquakes. , Such an astonishing loss has stimulated the growth of market demand for metal surface anti-corrosion products. Although st...

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Problems solved by technology

[0006] The main disadvantages of this treatment agent are: ①Nano silica is expensive, the dosage is as high as 5-200mg / L, and the cost is high

② The rare earth cerium salt is expensive, and the dosage is as high as 10-500mg / L, which increases the cost

③ Adding nano-silica requires the use of an ultrasonic cleaning machine for ultrasonic dispersion, and the operation process is complicated, which further increases the cost; ④ A kind of bissilylsilane is a bissilylsilane containing at least one non-hydrophilic functional group, which has poor water solubility , the hydrolysis time of silane is long, it is easy to lead to the polycondensation and crosslinking of silanol, which leads to poor corrosion resistance of the product

⑤ The storage stability of the silane treatment agent is poor. In order to improve the stability of the metal surface treatment agent, ethanol needs to be added during use, thereby increasing the biochemical oxygen consumption BOD of the wastewater and increasing the treatment cost of the wastewater, which is not easy to popularize and apply

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