Zinc residue double-vacuum purification charging basket anti-corrosion method

A double vacuum, material basket technology, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of poor corrosion resistance, short service life, etc., to improve the service life, improve the finish, solve the The effect of being easily corroded

Active Publication Date: 2014-03-12

攀枝花攀西蓝星化学清洗有限公司

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AI-Extracted Technical Summary

Problems solved by technology

The baskets commonly used in the industry are made of Q235 steel p...

Method used

[0024] After the zinc slag double vacuum purification basket made of Q235 steel plate is subjected to infiltration and plating, the problem that the existing basket is easily corroded can be effectively solved, and the service life of the basket is improved. The surface treatment on the inner surface of the material basket before infiltration can make the material seep quickly, and the depth of penetration into the material frame material can meet the anti-corrosion requirements.

[0025] The surface treatment me...

Abstract

The invention discloses a zinc residue double-vacuum purification charging basket anti-corrosion method, and particularly discloses a zinc residue double-vacuum purification charging basket anti-corrosion method for the field of steel making. The zinc residue double-vacuum purification charging basket anti-corrosion method comprises the following step of carrying out diffusion coating treatment on a zinc residue double-vacuum purification charging basket made of a Q235 steel plate, wherein the diffusion coating treatment comprises the following steps of A, carrying out surface treatment on the inner surface of the charging basket; B, preparing a permeating material, placing the prepared permeating material into the charging basket; C, placing the charging basket into the inner tank of a double-evaporation purification furnace, then carrying out vacuumizing treatment on the inner tank of the double-evaporation purification furnace, stopping vacuumization and filling argon when the vacuum degree of the inner tank is less than 10 Pa, and stopping argon filling when the pressure of the inner tank ranges from 10<4> Pa to 1.2*10<4> Pa. The zinc residue double-vacuum purification charging basket anti-corrosion method disclosed by the invention can effectively prevent the zinc residue double-vacuum purification charging basket from being excessively fast corroded; the zinc residue double-vacuum purification charging basket anti-corrosion method can effectively solve the problem that the traditional charging basket is easy to corrode by carrying out the diffusion coating treatment on the zinc residue double-vacuum purification charging basket made of the Q235 steel plate, thereby prolonging the service life of the charging basket.

Application Domain

Solid state diffusion coating

Technology Topic

Steel platesSurface finishing +6

Examples

Experimental program(1)

Example Embodiment

[0017] The present invention will be further explained below.

[0018] The zinc slag double vacuum purification basket anti-corrosion method adopted in the present invention is to perform permeation treatment on the zinc slag double vacuum purification basket made of Q235 steel plate, and the permeation treatment steps are:

[0019] A. Surface treatment on the inner surface of the basket;

[0020] B. Prepare permeate and load the prepared permeate into the basket;

[0021] C. After loading the basket into the inner tank of the double-vapor purification furnace, vacuumize the inner tank of the dual-vapor purification furnace. When the vacuum degree of the inner tank is When <10Pa, stop vacuuming and fill in argon gas. When the pressure range of the inner tank is 10 4 Pa to 1.2×10 4 At Pa, stop filling with argon;

[0022] D. Heat the material basket and take out the inner tank to cool after the completion of the permeation plating. After cooling, take the material basket out of the inner tank;

[0023] E. After taking out the material basket, the permeated material is recovered, and then the material basket is put into the double vaporized air purification furnace for heating, and then the material basket is taken out to obtain the finished product.

[0024] After the zinc slag double vacuum purification basket made of Q235 steel plate is permeated, it can effectively solve the problem that the existing basket is easily corroded and improve the service life of the basket. The surface treatment performed on the inner surface of the material basket before permeation can make the permeating material quickly penetrate into the material frame to meet the anti-corrosion requirements.

[0025] The surface treatment method described in step A is sandblasting. Sandblasting the surface can reliably remove the grease and oxide layer on the inner surface of the material frame at low cost, and improve the surface finish.

[0026] The infiltration material described in step B is made of Cr chromium powder 99.9%, analytical pure Al 2 O 3 And analytical pure NH 4 The percentage range of the mass of Cl is: Cr chromium powder accounts for 47% to 53%, and analytical purity accounts for Al 2 O 3 43% to 47%: analytically pure accounts for NH 4 Cl4% to 6%. The permeable material prepared with this ratio can fully and evenly penetrate into a certain depth inside the material basket under the action of high temperature, and a sufficient thickness of the anti-corrosion protective layer has been formed.

[0027] The method of loading the permeate material into the material frame in step B is: load the prepared permeate material into the material basket. When the thickness of the permeate material reaches 40mm, the cylinder and the material basket are guaranteed Concentric, and then add seepage material to the ring-shaped area formed by the cylinder and the basket to make the height of the seepage material reach the top of the basket. The distance between the outer wall of the cylinder and the inner wall of the basket is 40mm. The cylinder is made of Q235 steel plate with a wall thickness of 2mm. Made. Using the above method to pack the seepage material into the material frame can make the seepage material evenly penetrate into the easily corroded places on the inner surface of the material frame, and the depth of infiltration can meet the requirements of reliable corrosion protection.

[0028] The heating temperature in step D is 950°C, and the heating time is 10 hours. In the heating process of step D, using the above-mentioned temperature and time to heat the inner tank can fully penetrate into the material frame material without reducing the original strength of the material frame material.

[0029] The heating temperature in step E is 500°C, and the heating time is 1 hour. In the heating process of step E, the above-mentioned temperature and time are used to heat the inner tank so that the seepage material can fully penetrate into the interior of the material frame material without reducing the original strength of the material frame material.

[0030] The top of the inner tank is provided with an opening, and the opening of the inner tank is opened during the heating process of step E. In this way, the post-treatment of the basket can be completed in the air that can generate an oxidizing atmosphere to ensure the effect of permeation.

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Zinc residue double-vacuum purification charging basket anti-corrosion method

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Examples

Example Embodiment

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Description & Claims & Application Information

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