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Rare earth cerium-containing metal treatment fluid and production method thereof

A technology of metal treatment and rare earth cerium, applied in the direction of metal material coating process, etc., can solve the problems of inability to achieve long-term combination of paint film and inability to better ensure the activity of the metal surface film layer, and achieve strong activity, good adaptability, Apply faceted effects

Inactive Publication Date: 2012-05-02
宁波科苑鑫泰表面处理新技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this metal surface treatment agent still cannot better ensure the activity of the metal surface film layer, and cannot achieve long-term combination with the paint film.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A metal treatment solution containing rare earth cerium provided in this example, its formula consists of: 1 part of fluozirconic acid, 2.5 parts of zinc molybdate, 0.5 part of sodium nitrate, 0.05 part of disodium edetate, sodium fluoride 0.5 parts, 0.5 parts of cerium nitrate, 100 parts of water.

[0022] Its production method includes the use of water storage tanks, elevated tanks and reactors with stirring, and the process steps are:

[0023] 1) Before production, clean the inside of the reactor with industrial tap water, and then use an alcohol solvent to further clean the inside of the reactor. Does not contain alcohol-soluble substances;

[0024] 2) Pump the pure water from the water storage tank to the high level tank, and inject it into the reaction kettle after passing the meter;

[0025] 3) The amount of pure water injected per ton of finished product is controlled at 990kg, and the error is controlled within the range of plus 5kg;

[0026] 4) After starti...

Embodiment 2

[0033] A metal treatment liquid containing rare earth cerium provided in this example, its formula consists of: 0.5 parts of fluozirconic acid, 1.5 parts of zinc molybdate, 0.2 parts of sodium nitrate, 0.04 parts of disodium edetate, sodium fluoride 0.4 parts, 0.2 parts of cerium nitrate, and 100 parts of water. Production method is with embodiment 1.

[0034] A kind of rare earth cerium-containing metal treatment solution obtained according to the above formula and its production method, when in use, the metal parts of the rough surface low-carbon steel material to be treated are immersed in the metal surface treatment solution provided by this embodiment for 2 minutes to form Zirconia ceramic film, after aging treatment of zirconia ceramic film at 200 degrees Celsius for 20 minutes, and then use the spectroscopic method to test its surface activity, to reach nanocrystal, and then paint the film, at a temperature of 35 degrees Celsius , after 500 hours of testing, its corros...

Embodiment 3

[0036] A metal treatment solution containing rare earth cerium provided in this example, its formula consists of: 2 parts of fluozirconic acid, 3.5 parts of zinc molybdate, 1 part of sodium nitrate, 0.06 part of disodium edetate, sodium fluoride 0.6 part, 0.8 part of cerium nitrate, 100 parts of water, its production method is identical with embodiment 1.

[0037] A kind of rare earth cerium-containing metal treatment solution obtained according to the formula of the present embodiment and its production method, during use, the metal parts of the galvanized low-carbon steel material to be treated are immersed in the metal surface treatment solution provided by the present embodiment for 0.5 Minutes to form a zirconia ceramic film. After aging the zirconia ceramic film at a temperature of 160 degrees Celsius for 15 minutes, the surface activity of the zirconia ceramic film was tested by using a spectral method to reach nanocrystals. At Celsius temperature, after 500 hours of te...

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Abstract

The invention discloses a rare earth cerium-containing metal treatment fluid and a production method thereof. The rare earth cerium-containing metal treatment fluid is characterized by consisting of 0.5 to 2 parts of fluorozirconic acid, 1.5 to 3.5 parts of zinc molybdate, 0.2 to 1 part of sodium nitrate, 0.04 to 0.06 part of ethylene diamine tetraacetic acid, 0.4 to 0.6 part of sodium fluoride, 0.2 to 0.8 part of lanthanum nitrate and 100 parts of water. A ceramic technology is adopted, and after the metal surface treatment fluid is coated, sprayed or deposited on the surface of metal, a zirconium oxide ceramic film can be formed on the surface of the metal, and the activity of the zirconium oxide ceramic film formed on the surface of the metal is greatly improved under the action of a rare earth element of cerous nitrate; compared with the similar ceramic technology, the production method has the advantages that: the surface of the zirconium oxide ceramic film has higher activity, and the formed zirconium oxide ceramic film can be well bonded with the surface of the metal and also can be well bonded with a subsequent film required to be coated; and compared with a silane technology, the production method has a wider application range and high adaptability.

Description

technical field [0001] The invention relates to a metal surface treatment technology, in particular to a metal treatment solution containing rare earth cerium and a production method thereof. Background technique [0002] Phosphating of metal surfaces is usually a pretreatment method for sheet metal coating (including electrophoresis and electrostatic spraying). It has been used for a hundred years, but this method has great pollution to the environment and operators. Find other alternative technologies. [0003] In order to replace the highly polluting phosphating technology, there is currently a silane technology, and the other is a ceramic technology, which has no phosphorus and heavy metals, and increases the combination with the paint film. [0004] The Chinese patent application number is 200910116134.9, an environment-friendly metal surface treatment agent and its preparation method, which discloses a method of wetting the film-forming agent with an aqueous solution ...

Claims

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Application Information

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IPC IPC(8): C23C22/44
Inventor 叶阳明练致咏
Owner 宁波科苑鑫泰表面处理新技术有限公司
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