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Environment-friendly metal surface treating agent and preparation method thereof

A kind of metal surface treatment and environmental protection technology, applied in the direction of metal material coating process, etc., can solve the problems of easy failure, difficulty in obtaining completely dense and stable coating, and damage of composite film layer, and achieve excellent adhesion and corrosion resistance Effect

Active Publication Date: 2016-07-06
上海丰野表面处理剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, in order to improve the corrosion resistance of the silane coupling agent passivation film, the silane film forming process is combined with molybdate, tungstate and other passivation processes to form a multilayer film on the metal surface to obtain multiple protection. , but different treatment agents will be difficult to obtain a completely dense and stable coating due to the large difference in properties, and the formed composite film layer will be damaged and easy to fail, which will affect the long-term corrosion resistance of the metal

Method used

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  • Environment-friendly metal surface treating agent and preparation method thereof

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Embodiment approach

[0031] As an embodiment of the present invention, the first film-forming agent includes per 1 liter: 1-10 g of silane coupling agent, 0.2-0.6 g of carboxymethyl chitosan, and the balance of water.

[0032] As a preferred embodiment of the present invention, the first film-forming agent includes per 1 liter: 5-9 g of silane coupling agent, 0.3-0.5 g of carboxymethyl chitosan, and the balance of water;

[0033] A silane coupling agent:

[0034]The first film-forming agent described in the embodiment of the present invention is a water-based mixed liquid, the main component of which is a silane coupling agent, which is used to form a three-dimensional network-like organic film on the metal surface. Organosilane molecules contain organic and inorganic components, and can produce certain binding forces with polar substances and non-polar substances at the same time. It is characterized by having both polar and non-polar parts in the molecule. The general formula of monosilane st...

Embodiment approach 1

[0098] Embodiment 1, an environment-friendly metal surface treatment agent, including the first film-forming agent and the second film-forming agent, every 1 liter of the first film-forming agent includes: silane coupling agent 1 ~ 10g, carboxymethyl chitosan 0.2-0.6g, the remaining water; every 1 liter of the second film-forming agent includes: 0.5-3g of colloidal silica composite nano-cerium alumate, 0.1-6g of fluozirconic acid, 0.1-5g of fluotitanic acid, and the remaining water; The silane coupling agent includes an amino silane coupling agent and an epoxy silane coupling agent; the colloidal silica composite nano cerium vanamate refers to colloidal silica containing nano cerium vanamate.

Embodiment approach 2

[0099] Embodiment 2 is the same as Embodiment 1, the difference is that the colloidal silica composite nano-cerium vanamate is 30wt.% colloidal silica containing 0.01-0.2wt.% nano-cerium vanamate, and the pH value is 3 ~3.5.

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Abstract

The invention provides an environment-friendly metal surface treating agent which comprises a first film forming agent and a second film forming agent, wherein every 1 l of the first film forming agent comprises 1 to 10 g of silane coupling agents, 0.2 to 0.6 g of carboxymethyl chitosan, and the balance being water; every 1 l of the second film forming agent comprises 0.5 to 3 g of colloidal silicon dioxide composite nano ceriumvanadate, 0.1 to 6 g of hexafluorozirconic acid, 0.1 to 5 g of hexafluorotitanic acid, and the balance being water; the silane coupling agents comprise an amino silane coupling agent and an exposy silane coupling agent; and the colloidal silicon dioxide composite nano ceriumvanadate is colloidal silicon dioxide containing nano ceriumvanadate. According to the metal surface treating agent, a stable and compact composite protective covering film can be formed on the surface of a metal material, and excellent adhesiveness and corrosion resistance are achieved.

Description

technical field [0001] The invention relates to a metal surface treatment agent, in particular to an environment-friendly metal surface treatment agent and a preparation method. Background technique [0002] Metals in the atmosphere will react chemically or electrochemically with oxygen, water and other impurities under certain conditions to cause metal corrosion. Metal corrosion not only damages the metal material itself in terms of its shape, color and mechanical properties, but more importantly, it reduces the quality level of its products, and damages its precision and sensitivity. Although stains from corrosion of metal surfaces can be removed from the metal substrate, these methods are often time consuming and also reduce the strength of the metal. In addition, when the metal surface is coated with polymer coatings, adhesives or rubber preservatives, the corrosion of the metal surface will cause the loss or weakening of the adhesion between the preservative coating ...

Claims

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Application Information

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IPC IPC(8): C23C22/44
CPCC23C22/44C23C2222/20
Inventor 许华定
Owner 上海丰野表面处理剂有限公司
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