Mechanical zinc-plating process

A mechanical galvanizing and process technology, applied in the direction of pressure inorganic powder coating, etc., can solve the problem of limited corrosion resistance of the coating

Inactive Publication Date: 2003-03-05
SHANDONG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

For example, the Chinese patent with the patent number CN1052512A adopts electric furnace zinc powder for mechanical galvanizing, first forms a copper layer on the iron base, and then coats it with an activator (mainly polyvinyl alcohol, sodium lauryl sulfate, sodium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0019] Choose 50 kilograms of cement nails to be plated workpiece Φ3 ~ 6.

[0020] After cleaning the surface of cement nails, put them into the plating barrel; add 70 kg of glass microspheres into the plating barrel, the particle diameters of which include 0.3-0.4 mm, 0.4-0.5 mm, and 0.5-0.6 mm, and the weight ratio is 1:1:1; add water to make it soak the workpiece and microbeads; rotate the plating barrel, and add 500 ml of activated and dispersed plating flux and 5 kg of zinc powder in 5 times during the rotation, with an interval of 5 minutes each time After the feeding is completed, continue to rotate the plating barrel for 10 minutes, pour out the workpiece and glass beads in the plating barrel, separate, and dry to obtain the plated workpiece. The thickness of the coating is 35 to 40 microns.

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Abstract

The present invention provides a mechanical galvanization process. It uses industrial zine powder (150-300 meshes) as raw material, utilizes special-purpose active dispersion galvanization adjuvant and uses glass microbeads as impact medium to implement mechanical galvanization of iron base metal workpieces of metal structure components, standard components and casting iron pipe, etc. and can obttain the uniform, compact and smooth pure galvanized layer with silver white colour. Said galvanized layer possesses good corrosion resistance and stability.

Description

1 Technical field [0001] The invention belongs to the technical field of surface coating, in particular to a mechanical galvanizing process. 2 background technology [0002] Mechanical galvanizing is a new surface coating process developed in the 1970s. It has the advantages of room temperature operation, no hydrogen embrittlement, fast plating speed, high production efficiency, low cost, and little pollution. Therefore, It is widely used in the industrial field. The existing mechanical galvanizing process is: pretreatment (degreasing → rinsing → pickling → rinsing) → flash plating → galvanizing → separation → rinsing → drying and other processes. [0003] The "flash plating" operation is to form a layer of other metal layers that are more flexible than zinc on the surface of iron-based metal parts before galvanizing. The purpose of this step is twofold: one is to prevent the oxidation of the iron base; the other is to utilize the sensitization reaction between the formed ...

Claims

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Application Information

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IPC IPC(8): C23C24/04
Inventor 主沉浮于萍张长桥魏云鹤杜学军高峰田芳孙瑛
Owner SHANDONG UNIV
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