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Solid diffusion surface anti-corrosion treatment method for carbon steel clamping and pressing pipe fitting

A solid-state diffusion and anti-corrosion treatment technology, applied in solid-state diffusion coating, metal material coating process, coating and other directions, can solve the problems of difficult to meet actual requirements, difficult process and cost enterprises, unable to apply industrial production and other problems, to achieve simplification The effect of surface modification process, high yield and easy parameter control

Active Publication Date: 2020-11-06
江苏领嘉科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the limitations of the existing process methods, all parties are actively committed to the frontier research on the surface modification of pipe fittings, including vapor deposition coating, micro-arc oxidation, ion implantation of metal chromium and nitrogen, etc., laser surface treatment, etc., but the above The technology is still immature, and the process and cost are difficult for enterprises to accept. Some technologies are still in the exploratory stage and cannot be applied in industrial production.
Under certain working conditions, in order to prevent the toxicity of organic matter on the surface of pipe fittings, the corrosion-resistant layer of pipe fittings is required to be inorganic, such as aircraft control panels, seats and other components. However, most of the surface modification layers of pipe fittings currently contain organic matter, which is difficult meet actual requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The process of preparing metal coating material with zinc powder to make alloy layer on the surface of pipe fittings

[0035] Specific steps are as follows:

[0036] a. Surface treatment of pipe fittings, use degreasing agent to remove oil stains on the surface of the workpiece, if there is yellow rust on the surface of the workpiece, surface derusting treatment is required;

[0037] b. Select zinc powder with a particle size range of 450 mesh, and the dosage is 15-50Kg / T; the anti-adhesive agent is SiO 40-100 mesh 2 , the dosage is 30-50% of the effective volume of the charging cylinder; the penetration aid is NH 4 Cl, accounting for about 0.25% of the total charge penetration agent;

[0038] e. Place the pipe fittings in the furnace to heat the solid-state diffusion, the temperature is controlled at about 480°C, and the heating time is generally controlled at 5 hours; when heating the solid-state diffusion in the furnace, in order to prevent the oxidation of the pip...

Embodiment 2

[0042] The process of preparing metal coating material with zinc powder and aluminum powder to make alloy layer on the surface of pipe fittings

[0043] Specific steps are as follows:.

[0044]a. Surface treatment of pipe fittings, use degreasing agent to remove oil stains on the surface of workpiece, and then use shot blasting to remove rust;

[0045] b. Choose a particle size range of 350 mesh zinc powder, 250 mesh aluminum powder, and 70 mesh SiO 2 Prepare metal infiltration materials; infiltration aids account for about 0.35% of the total furnace charge infiltration agents;

[0046] e. Place the pipe fittings in the furnace to heat the solid-state diffusion, the temperature is controlled at 480°C, and the heating time is generally controlled within 4-8 hours; when heating the solid-state diffusion in the furnace, in order to prevent the oxidation of the pipe fittings, vacuum or gas protection can be adopted; When vacuuming, the vacuum degree is about -4.2~-5.3×10 4 Pa, ...

Embodiment 3

[0050] The process of preparing metal coating material with zinc powder and nickel powder to make alloy layer on the surface of pipe fittings

[0051] Specific steps are as follows:.

[0052] a. Surface treatment of pipe fittings, use degreasing agent to remove oil stains on the surface of workpiece, and then use shot blasting to remove rust;

[0053] b. Select a particle size range of 350 mesh zinc powder, 400 mesh nickel powder, and 70 mesh SiO 2 Prepare metal infiltration materials; infiltration aids account for about 0.35% of the total furnace charge infiltration agents;

[0054] e. Place the pipe fittings in the furnace to heat the solid-state diffusion, the temperature is controlled at about 450°C, and the heating time is generally controlled within 5 hours; when the solid-state diffusion is heated in the furnace, in order to prevent the oxidation of the pipe fittings, vacuum or gas protection can be adopted. The vacuum degree is about -4.2~-5.3×10 in vacuum 4 Pa, or ...

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Abstract

The invention discloses a solid diffusion surface anti-corrosion treatment method for a carbon steel clamping and pressing pipe fitting. The surface anti-corrosion treatment method is a solid diffusion process and comprises the following steps of: wrapping a workpiece in an inert material, adding materials including but not limited to zinc powder, aluminum powder and nickel powder, and heating theresulting product in a closed container to 300-500 DEG C to make zinc, nickel, aluminum and other metals diffuse into the workpiece, so that a compact and uniform intermetallic compound coating of zinc, other alloys and iron is formed on the surface layer of a substrate. The coating can be polished, oiled, painted, sprayed with plastic, or treated with a sealing agent or an organic coating, and the corrosion resistance or decorative performance or the like of the coating can be further improved. The method is performed in the heat-insulating and sealed container, the heat efficiency is high,the energy-saving requirement is met, no waste water or smoke dust is generated in the whole process, and the process is environmentally friendly.

Description

technical field [0001] The invention relates to a surface anticorrosion treatment method for a carbon steel compression pipe fitting, and is applicable to carbon steel compression type pipe fittings with a diameter of 15 to 300 mm. Background technique [0002] The existing anti-corrosion technologies for the surface of carbon steel compression-type pipe fittings include electro-galvanizing, electrophoretic coating paint, and multi-element alloy composite anti-corrosion coating (patent number: CN102418831). Good binding. During the crimping installation process of the crimping pipe fittings, the coating is prone to mechanical damage at the contact part with the crimping pliers, which will lead to a decrease in the corrosion resistance of the damaged part of the coating and reduce the service life of the product. [0003] The process of electrogalvanized pressing pipe fittings includes: pipe material—cutting material—flat end—forming (including pipe end forming, pipe bending...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C10/52
CPCC23C10/52
Inventor 袁雪峰孙静琪车东升胡国栋
Owner 江苏领嘉科技有限公司
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