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Epoxy Resin Coating Process on the Surface of Galvanized Pipe

A technology of epoxy resin and galvanized pipe, which is applied in the coating process of metal materials, the device for coating liquid on the surface, and the surface pretreatment, etc., which can solve the problem that the pipe cannot withstand deep processing, the thickness of the coating is difficult to control, and the coating Poor uniformity and other problems, to achieve the effect of low cost, good quality and less coating process

Active Publication Date: 2022-05-24
COOPER STANDARD JINGDA JINGZHOU AUTOMOBILE FITTINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the production process of the above two processes, flow lines are easy to form on the surface of the galvanized pipe, and the thickness of the coating is not easy to control, resulting in poor uniformity of the coating. The layer falls off, causing the pipe to be unable to withstand deep processing, that is, the pipe cannot be processed by flaring at the end of the pipe of the bending machine, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]The diameter of the galvanized pipe is 9.52 mm, and the coating process is carried out with the present invention:

[0038] (1) Passivation: The galvanized pipe with a diameter of 9.52 mm is passivated in the passivation tank with SurTec680Lc trivalent chromium passivation solution produced by Sediq. The galvanized pipe runs in the upper tank, and the The passivation solution is pumped into the upper tank to spray passivate the galvanized pipe. The temperature of the passivation solution is 55℃. The purpose of the passivation treatment is to prevent the oxidation of the galvanized layer on the surface of the galvanized pipe and improve the galvanization. The corrosion resistance of the pipe, the thickness of the passivation layer on the surface of the galvanized pipe is 2 microns;

[0039] (2) Drying: The passivated galvanized pipe enters the drying box for drying treatment. The tubular electric heater and the air ring blower in the drying box blow the hot air to the pas...

Embodiment 2

[0045] The galvanized pipe has a diameter of 4.76 mm and is coated with the present invention:

[0046] (1) Passivation: The galvanized pipe with a diameter of 4.76 mm is passivated with a thick-film trivalent chromium passivation solution in the passivation tank. The lower pump is sent to the upper tank for spray passivation of the galvanized pipe. The temperature of the passivation solution is 35 °C. The purpose of the passivation treatment is to prevent the oxidation of the galvanized layer on the surface of the galvanized pipe and improve the anti-corrosion performance of the galvanized pipe. The thickness of the passivation layer on the surface of the galvanized pipe is 1 micron;

[0047] (2) Drying: The passivated galvanized pipe enters the drying box for drying treatment. The tubular electric heater and the air ring blower in the drying box blow the hot air to the passivated galvanized pipe for drying. The passivation solution on its surface keeps the temperature of th...

Embodiment 3

[0053] The diameter of the galvanized pipe is 6 mm, and the coating process is carried out with the present invention:

[0054] (1) Passivation: The galvanized pipe with a diameter of 6 mm is passivated with trivalent chromium passivation solution in the passivation tank, the galvanized pipe is run in the upper tank, and the passivation solution in the lower tank is pumped by the liquid The galvanized pipe is sprayed and passivated by entering the upper tank. The temperature of the passivation solution is 33 °C. The purpose of passivation is to prevent the oxidation of the galvanized layer on the surface of the galvanized pipe and improve the anti-corrosion performance of the galvanized pipe. The thickness of the passivation layer on the surface of the tube is 1.5 microns; the trivalent chromium passivation solution is prepared by the following method: dissolving 0.8 g of chromium sulfate in an appropriate amount of water, adding 0.03 g of zirconium oxychloride, 0.02 g of alumi...

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Abstract

The invention relates to a process for coating epoxy resin on the surface of galvanized pipes, which is to passivate the galvanized pipes in a passivation tank with a thick-film type trivalent chromium passivator, then put them into a drying box for drying, and then enter In the coating tank, after the epoxy resin in the lower tank is heat-exchanged and filtered to remove impurities, it is pumped into the surface of the galvanized pipe running in the upper tank by the submerged pump to be sprayed and coated into a resin tube, and the resin tube is heated. After solidification, it enters the cooling station and is sprayed with pure water for cooling, and finally it is rolled into a finished product. The product produced by the invention is of good quality, uniform in color, smooth in coating, and strong in adhesion. The product can reach 600 hours after the salt spray test, and the range of red rust does not exceed 0.2%. Its cost is low, the coating process is few, and the product is cost-effective .

Description

technical field [0001] The invention relates to a surface coating process of a brake pipe in the automobile industry. Background technique [0002] Galvanized pipe is divided into two types: single-layer galvanized pipe and double-layer galvanized pipe. The surface of galvanized pipe is often used for automobile steering that is related to the safety and reliability of the entire vehicle and occupants after being coated with epoxy resin. system and braking system. [0003] The traditional epoxy resin coating process on the surface of the galvanized pipe usually adopts the dip coating process or the spray coating process. The dip coating process is to immerse the galvanized pipe in the epoxy resin storage tank. When the galvanized pipe is running, the epoxy resin in the storage tank is continuously coated on its surface. Epoxy is sprayed on the surface of the galvanized pipe running forward. In the production process of the above two processes, the surface of the galvanize...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D7/14B05D3/02C23C22/40C23C22/76
CPCB05D7/14B05D3/0254C23C22/40C23C22/76C23C2222/10B05D2504/00
Inventor 岑超陶锦白刚冷琪沈勤伟
Owner COOPER STANDARD JINGDA JINGZHOU AUTOMOBILE FITTINGS