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A solid-state diffusion surface anti-corrosion treatment method for carbon steel clamping pipe fittings

A solid-state diffusion and anti-corrosion treatment technology, which is applied in the direction of solid-state diffusion coating, metal material coating process, coating, etc., can solve the problems that cannot be applied to industrial production, difficult to meet actual requirements, difficult to process and cost, etc., to achieve finished products The effect of high efficiency, changing the physical and chemical properties of the surface, and easy control of parameters

Active Publication Date: 2021-07-13
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] c. 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] c. 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 at 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, or u...

Embodiment 3

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

[0051] Specific steps are as follows:

[0052] a. Carry out surface treatment on the pipe fittings, use degreasing agent to remove the oil stain on the surface of the workpiece, then use shot blasting to remove rust, and then immerse in 10% by weight of dilute hydrochloric acid solution for 5 minutes;

[0053] B, choose aluminum powder and zinc powder that particle size range is 550 mesh, the mixing ratio of aluminum powder and zinc powder is aluminum powder: zinc powder=25~27: 73~75;

[0054] Use phenolic resin or p-tert-butylphenol as binder to prepare metal coating materials; phenolic resin or p-tert-butylphenol accounts for about 0.35% of the total mixed powder;

[0055] c. Apply the prepared metal coating material evenly on the surface of the pipe fittings, and the coating thickness is about 2.6mm;

[0056] d. Place the coated pipe fitting...

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Abstract

The invention discloses a solid-state diffusion surface anti-corrosion treatment method for carbon steel clamping pipe fittings. The surface anti-corrosion treatment method is a solid-state diffusion process, that is, the workpiece is wrapped in an inert material and added to the following materials including but not limited to: Zinc powder, aluminum powder, nickel powder, etc., and placed in a closed container and heated to 300-500 ° C, so that zinc, nickel, aluminum and other metals diffuse into the interior of the workpiece, thereby forming a dense and uniform layer of zinc and other alloys on the surface of the substrate. Iron intermetallic coating. On the coating, it can be polished, oiled, painted, sprayed, sealant or organic coating, etc., which can further improve the corrosion resistance or decorative performance of the coating. It is carried out in a closed container with high thermal efficiency and meets the requirements of energy saving, and the whole process does not generate waste water and smoke, which is a green and environmentally friendly process.

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 Patents(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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