A kind of preparation method of modified metal powder

A metal powder and modification technology, which is applied in the direction of metal processing equipment, metal material coating technology, powder coating, etc., can solve the problems such as complex preparation process, and achieve the goal of solving complex preparation process, improving corrosion resistance, and improving adhesion Effect

Active Publication Date: 2019-06-04
DONGFANG ELECTRIC (CHENGDU) HYDROGEN FUEL CELL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a metal powder modification solution, a modified metal powder, a preparation method of a modified metal powder, and a metal micropowder-based coating, so as to solve the problem that the preparation process of the metal-based micropowder coating is complicated in the prior art

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  • A kind of preparation method of modified metal powder
  • A kind of preparation method of modified metal powder
  • A kind of preparation method of modified metal powder

Examples

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preparation example Construction

[0050] In yet another typical embodiment of the present application, a method for preparing modified metal powder is provided. The preparation method includes: mixing the above-mentioned metal powder modifying liquid and metal powder, making the metal powder modifying liquid and metal The powder reacts at room temperature (around 25°C) to 98°C to obtain modified metal powder

[0051] Utilize the metal powder modifying solution of the present application to modify the metal powder under the above mild conditions, the reaction time between the metal powder modifying solution and the metal powder is relatively short, making the preparation method of the modified metal powder of the present application relatively simple , Easy to control. If the temperature of the above reaction is too high, the metal powder will easily become brittle, and if the temperature is too low, the reaction will be too slow.

[0052] And in the modification process, phosphoric acid provides an acidic env...

Embodiment 1

[0065] The composition of the metal powder modifying solution is shown in Table 1.

[0066] The process of metal powder treatment and coating preparation is as follows:

[0067] Add the above-mentioned phosphoric acid, chromium trioxide, sodium fluoride, and deionized water into the stirred tank, heat it in a water bath to 60°C, and stir at a speed of 600r / min for 30min to obtain a metal powder modification solution;

[0068] Slowly add 10kg of spherical aluminum powder to the above stirring tank, maintain the water bath temperature at 60°C, stir at a rate of 600r / min for 10min, stop stirring, and obtain the post-reaction system;

[0069] After the centrifugal separation reaction, the system was left to stand still to obtain aluminum powder precipitation, the supernatant was poured out, the modified aluminum powder was washed with deionized water for 3 times, and dried for later use;

[0070] Prepare the modified aluminum powder after drying with phosphate binder, additives a...

Embodiment 2 to 6

[0072] The implementation process is the same as in Example 1, and the composition of the metal powder modification solution is shown in Table 1.

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Abstract

The invention provides a metal powder modification solution, a modified metal powder, a preparation method of the modified metal powder and a metal micropowder-based paint. The metal powder modification liquid includes: phosphoric acid, phosphoric acid is calculated as H+, so that the pH value of the metal powder modification liquid is between 1.0 and 3.0; 0.1 to 1 weight part of passivation accelerator; and 75 to 100 weight parts of deionized water . The passivation film formed on the surface of the metal powder by using the above-mentioned metal modifying liquid can improve the corrosion resistance of the metal powder and the coating, and at the same time improve the adhesion between the metal powder and the coating and the substrate to be protected. When using the metal powder modifying solution to modify the metal powder, it is only necessary to mix the two and react under mild conditions, thereby solving the problem of complex preparation process of the metal-based micro-powder coating in the prior art.

Description

technical field [0001] The invention relates to the field of metal powder materials, in particular to a metal powder modification solution, a modified metal powder, a preparation method of the modified metal powder, and a metal micropowder-based coating. Background technique [0002] Metal-based micropowder coatings are coatings formed by mixing flake or spherical metal powders with binders formed from inorganic salts or organic solvents and other additives. The metal-based micro-powder coating is coated on the surface of a pretreated metal workpiece, and is sintered and solidified to form a metal-based micro-powder coating. The metal powder in the metal-based micropowder coating can use a single metal powder, or a mixture of several metal powders or their alloys. The most commonly used metal powders are nickel, zinc, aluminum, zinc-nickel and zinc-aluminum; binder There are inorganic phosphates, silicates, chromates, borates, aluminates and organic resins; additives includ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00C23C22/08C23C22/10C23C22/33C09D5/10C09D5/03C09D1/00
CPCC23C22/08C23C22/10C23C22/33C09D1/00C09D5/03C09D5/038C09D5/10C09D5/103C09D5/106B22F1/145
Inventor 刘红丽汤浩宋亚婷卢毅刘佳燚
Owner DONGFANG ELECTRIC (CHENGDU) HYDROGEN FUEL CELL TECH CO LTD
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