Processing process of aluminum veneer

A processing technology, aluminum veneer technology, applied in the metal material coating process, the device for coating liquid on the surface, pretreatment of the surface, etc., can solve the problems of high sewage treatment cost, increased treatment cost, weak corrosion resistance, etc. , to achieve excellent spray paint effect, improve corrosion resistance, and good corrosion resistance

Pending Publication Date: 2020-12-04
江苏佰大幕墙科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Today's aluminum veneer is prone to paint peeling off after long-term use, and its corrosion resistance is relatively weak in the face of harsh external environments
[0004] Among them, passivation treatment generally uses chromate solution, and chromium is a heavy metal, and chromium-containing sewage is a serious pollution source. The water tank used for chromization treatment needs to undergo strict chromium removal treatment before it can be discharged, and the cost of sewage treatment is high. Chromium cured products need to be recycled, which increases the processing cost. In addition, chromated products contain chromium. When the product is no longer used, it will cause environmental pollution if it is directly discarded.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Pretreatment: Roughly grind the aluminum veneer once with 4000-mesh sandpaper, and then fine-grind with 9000-mesh sandpaper for the second time, then wash it with water, spray the degreasing agent after the water is drained, wash with water and bake after the degreasing is completed Dried, then soaked in pickling solution, washed with water and drained after pickling.

[0023] (2) Chromium-free passivation: put the aluminum veneer drained in (1) into the passivation solution, the passivation solution includes: zirconium sulfate 0.1g / L, iron hydroxide 0.2g / L, tripolymer Sodium phosphate is 0.2g / L, organic acid is 1.0g / L, and the balance is adjusted to pH 11.5 with sodium hydroxide. Put it into a solution containing 20g / L phytic acid, the pH value of the phytic acid solution is 3, dip for 9S at a temperature of 65°C, wash it with deionized water and dry it;

[0024] (3) Spraying: Spray the surface of the aluminum veneer that has been passivated in (2) with a high-vol...

Embodiment 2

[0026] (1) Pre-treatment: Roughly grind the aluminum veneer with 5000-mesh sandpaper once, then fine-grind with 9000-mesh sandpaper for the second time, and then wash it with water. After the water is drained, spray the degreasing agent. After the degreasing is completed, wash it with water and bake it. Dried, then soaked in pickling solution, washed with water and drained after pickling.

[0027] (2) Chromium-free passivation: put the aluminum veneer drained in (1) into the passivation solution, the passivation solution includes: zirconium sulfate 0.3g / L, iron hydroxide 0.3g / L, tripolymer Sodium phosphate is 0.3g / L, organic acid is 1.0g / L, and the balance is adjusted to PH to 12 with sodium hydroxide. Put it into a solution containing 25g / L phytic acid, the pH value of the phytic acid solution is 4, dip for 8S at a temperature of 60°C, wash it with deionized water and dry it;

[0028] (3) Spraying: Spray the surface of the aluminum veneer that has been passivated in (2) with...

Embodiment 3

[0030] (1) Pretreatment: Roughly grind the aluminum veneer with 4000-mesh sandpaper once, and then finish grinding with 10000-mesh sandpaper for the second time, then wash it with water, spray the degreasing agent after the water is drained, wash with water and bake after the degreasing is completed Dried, then soaked in pickling solution, washed with water and drained after pickling.

[0031] (2) Chromium-free passivation: put the aluminum veneer drained in (1) into the passivation solution, the passivation solution includes: zirconium sulfate 0.2g / L, iron hydroxide 0.3g / L, tripolymer Sodium phosphate is 0.3g / L, organic acid is 1.2g / L, the balance is adjusted to PH to 13 with sodium hydroxide, and the temperature is controlled at 70°C. Immerse the aluminum veneer in the above-mentioned passivation solution for 9S, then wash it with water, and then put it away. Put it into a solution containing 25g / L phytic acid, the pH value of the phytic acid solution is 3, soak it for 7S at...

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Abstract

The invention discloses a processing process of an aluminum veneer. The processing process comprises the following steps of pretreatment: carrying out primary rough grinding and secondary fine grinding on the aluminum veneer through sand paper, washing the aluminum veneer completely, spraying an oil removing agent after the aluminum veneer is drained, washing and drying the aluminum veneer after removing oil, soaking the aluminum veneer in a pickling solution, and washing and draining the aluminum veneer after pickling; chromium-free passivation: putting the drained aluminum veneer into a passivation solution, washing with water, dipping in a solution containing phytic acid, cleaning with deionized water, and drying; and spraying: spraying a fluorocarbon coating primer on the surface of the passivated aluminum veneer by using a high-voltage electrostatic spray gun, placing at a low temperature for leveling, continuously uniformly spraying a fluorocarbon coating finish paint by using the high-voltage electrostatic spray gun, placing at a low temperature for leveling, continuously uniformly spraying a fluorocarbon coating varnish by using the high-voltage electrostatic spray gun, placing at a low temperature for leveling, and then drying to finish processing. The processing process of the aluminum veneer has the advantages of better corrosion resistance and higher stability.

Description

technical field [0001] The invention relates to the technical field of aluminum veneer processing, in particular to an aluminum veneer processing technology. Background technique [0002] Curtain wall aluminum veneer is a new type of curtain wall material that uses high-quality aluminum alloy plate as the base material, and is formed by numerical control bending and other technologies, and the surface is sprayed with decorative paint. [0003] As time goes by, the surface coating of the building curtain wall will lose light, discolor, pulverize and fall off in the atmospheric environment, resulting in the exposure of the curtain wall base material. Corrosion due to electrochemical reaction, performance degradation, or even destruction, so the anti-corrosion technology of curtain wall base material plays an extremely important role in the safety performance and durability of curtain wall base material. Today's aluminum veneer is prone to paint peeling off after long-term use...

Claims

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Application Information

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IPC IPC(8): B05D7/16B05D7/00B05D3/02B05D3/10B05D3/12C23C22/66C23C22/78C23C22/82
CPCB05D7/16B05D7/51B05D3/12B05D3/102B05D3/0254C23C22/66C23C22/82C23C22/78B05D2202/25B05D2350/50
Inventor 马涛杨强
Owner 江苏佰大幕墙科技有限公司
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