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Aluminum plating solution, hot-dip aluminum plating method and prepared metal device

A technology of hot-dip aluminum plating and aluminum plating, applied in hot-dip plating process, metal material coating process, coating, etc., can solve problems such as poor coating adhesion, achieve easy operation, improve adhesion, reduce The effect of oxidation

Active Publication Date: 2011-12-28
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a kind of aluminum plating solution for hot-dip aluminum plating process aimed at the defect of poor adhesion of the coating formed on the surface of the device after hot-dip plating of the aluminum plating solution in the prior art. The coating formed on the surface of the metal device treated by the aluminum plating solution has strong adhesion, is not easy to fall off, and has good corrosion resistance.

Method used

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  • Aluminum plating solution, hot-dip aluminum plating method and prepared metal device
  • Aluminum plating solution, hot-dip aluminum plating method and prepared metal device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 11

[0064] Embodiment 11Cr13 steel hot-dip aluminum plating

[0065] Degreasing liquid: 30g / L sodium hydroxide, 45g / L sodium carbonate, 30g / L sodium phosphate, 4g / L sodium silicate, the balance is water; derusting liquid: 15% hydrochloric acid, 0.5% urotropine, The balance is water; flux: 5% K 2 ZrF 6 Solution; aluminum plating solution 98%Al-2%RE (30%La, 70%Ce): mix La and Ce with mass fractions of 30% and 70% respectively, melt into RE alloy at 900°C, and then mass Mix the above-mentioned RE alloys and aluminum with fractions of 2% and 98%, respectively, and melt them into an aluminum plating solution at 650°C; surface covering agent: 50% KCl, 40% NaCl, and 10% NaF; passivation treatment solution: nitric acid, The volume ratio of phosphoric acid and distilled water is 1:1:20.

[0066] The workpiece is made of 1Cr13 steel plate, and the workpiece is degreased with a degreasing liquid at 80°C. After visual inspection, clean the degreasing liquid on the surface of the workpiece ...

Embodiment 21

[0070] Corrosion resistance test of embodiment 21Cr13 steel after hot-dip aluminizing

[0071] The 900° C. cyclic oxidation experiment was carried out with the 1Cr13 steel plate obtained in Example 1 after hot-dip aluminum plating.

[0072] The experiment was carried out according to the metallurgical standard YB48264, and the oxidation rate of the 1Cr13 steel plate after hot-dip aluminizing was V=0.0027g / m 2 h, the oxide film of the coating at 900°C is dense α-Al 2 o 3 , Oxidation depth index R<<0.1mm / a, with complete anti-oxidation and corrosion performance at 900 °C. Compared with the 1Cr13 steel plate without dipping, the 1Cr13 steel plate after hot-dip aluminum plating has better resistance to high temperature oxidation corrosion.

Embodiment 3A3

[0073] Example 3A3 steel hot-dip aluminized

[0074] Degreasing liquid: 35g / L sodium hydroxide, 40g / L sodium carbonate, 40g / L sodium phosphate, 4g / L sodium silicate, the balance is water; derusting liquid: 15% hydrochloric acid, 1% urotropine, The balance is water; flux: 5% K 2 ZrF 6 Solution; aluminum plating solution 98%Al-2%RE (20%La, 80%Ce): the mass fraction is respectively 20%, 80% La, Ce mixed, smelted into RE alloy at 850 ℃, and then the mass Mix the above-mentioned RE alloys and aluminum with fractions of 2% and 98%, respectively, and melt them into an aluminum plating solution at 700°C; surface covering agent: 40% KCl, 45% NaCl, and 15% NaF; passivation treatment solution: nitric acid, The volume ratio of phosphoric acid and distilled water is 1:1:20.

[0075] The workpiece is made of A3 steel plate, and the workpiece is degreased with degreasing liquid at 90°C. After visual inspection, the degreasing liquid on the surface of the workpiece is cleaned with 85°C wat...

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Abstract

The invention discloses aluminum plating liquid, a hot dip aluminum plating method and a metal device manufactured thereby. The aluminum plating liquid comprises 92 to 98 mass percent of aluminum and 2 to 8 mass percent of RE, wherein the RE is a mixture of 10 to 30 mass percent of lanthanum (La) and 70 to 90 mass percent of cerium (Ce). In the hot dip aluminum plating method, a workpiece is subjected to hot dip aluminum plating treatment by the aluminum plating liquid. Rare-earth elements are added into the aluminum plating liquid, so the aluminum plating liquid is purified, crystal grains are refined, and wettability between the aluminum plating liquid and the workpiece and flowability of the aluminum plating liquid are improved. The aluminum plating liquid is applied to the hot dip aluminum plating process, so that adhesivity between the plated workpiece and a plating layer is improved and corrosion resistance of the workpiece is enhanced.

Description

technical field [0001] The invention relates to the technical field of chemical heat treatment of metal surfaces, in particular to an aluminum plating solution, a hot-dip aluminum plating method using the aluminum plating solution, and a metal device prepared by the method. Background technique [0002] When metal devices are used in harsh environments such as the ocean, they are affected by various corrosion effects such as sunlight, wave erosion, and salt spray at the same time. The corrosion problem of the devices is quite serious, causing serious economic losses. For a long time, people have been looking for various methods to reduce the damage caused by corrosion, and generally use methods such as spraying paint on the surface of the device and applying a protective coating to protect it. [0003] For example, the currently commonly used hot-dip aluminum plating method applies a layer of aluminum or aluminum alloy coating on the surface of the metal device to delay the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/12C23C2/30C23C2/26
Inventor 周明杰李里
Owner OCEANS KING LIGHTING SCI&TECH CO LTD