Aluminizing liquid, hot dip aluminum plating method and metal device prepared by method

A hot-dip aluminization and aluminum-plating technology, applied in hot-dip plating process, metal material coating process, coating and other directions, can solve problems such as poor coating adhesion, achieve easy operation, reduce oxidation, and low equipment requirements Effect

Active Publication Date: 2012-02-01
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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  • Aluminizing liquid, hot dip aluminum plating method and metal device prepared by method
  • Aluminizing liquid, hot dip aluminum plating method and metal device prepared by method

Examples

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preparation example Construction

[0030] The preparation method of this aluminum plating solution, such as figure 1 As shown, including the following process flow:

[0031] Step S1, degreasing step: put the workpiece into the degreasing liquid, and treat it at a temperature of 60-90° C. for 5-15 minutes; wherein, the degreasing liquid formula includes: 20-50% hydroxide Sodium, 30-50% sodium carbonate, 20-40% sodium phosphate, 3-6% sodium silicate, the balance is water;

[0032] Step S2, cleaning step: place the workpiece after the degreasing treatment in normal temperature water or high temperature water of 60-90°C, and remove the degreasing liquid on the surface of the workpiece;

[0033] Step S3, rust removal step: put the cleaned workpiece into the rust removal solution, and perform rust removal treatment at room temperature for 5-15 minutes; immediately after the rust removal is completed, strict cleaning should be carried out to remove the acid solution on the surface of the workpiece; In the formula of...

Embodiment 11

[0069] Embodiment 11Cr13 steel hot-dip aluminum plating

[0070] Degreasing liquid: 40g / L sodium hydroxide, 30g / L sodium carbonate, 35g / L sodium phosphate, 3g / L sodium silicate, the balance is water; derusting liquid: 10% hydrochloric acid, 0.5% urotropine, The balance is water; flux: 10% K 2 ZrF 6 Solution; aluminum plating solution: 94% Al, 4% Si, 2% RE (among them, among RE rare earth metals, 30% La, 60% Ce, 10% Pr by mass ratio); surface covering agent: 40% KCl, 45% NaCl, and 15% NaAlF 6 ; Passivation treatment solution: the volume ratio of nitric acid, phosphoric acid and distilled water is 1:1:20.

[0071] The workpiece is made of 1Cr13 steel plate. Use degreasing liquid to degrease the workpiece at 80-90°C. After visual inspection and cleaning, clean the degreasing liquid on the surface of the workpiece with normal temperature water, then derust with derusting liquid for 10 minutes, clean it again, and then At 90°C, use fluxing agent for 2min.

[0072] After the fl...

Embodiment 21

[0075] Corrosion resistance test of embodiment 21Cr13 steel after hot-dip aluminizing

[0076] The 900° C. cyclic oxidation experiment was carried out with the 1Cr13 steel plate obtained in Example 1 after hot-dip aluminum plating.

[0077] The experiment was carried out according to the metallurgical standard YB48264. The 1Cr13 steel plate after hot-dip aluminum plating has a completely dense oxide film at 900°C, the oxidation rate is very small, and it has complete oxidation and corrosion resistance 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.

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Abstract

The invention discloses an aluminizing liquid as well as a preparation method and application thereof. The aluminizing liquid comprises the following components by mass percent: 2-6% of Si and 2-4% of RE and the balance of Al, wherein the RE is a mixture of 25-30% of La, 55-65% of Ce and 5-10% of Pr. According to the invention, Si and rare earth elements are added in the aluminizing liquid, thereby improving the flowability of the aluminizing liquid, reducing the temperature of hot dip aluminum plating and reducing the content of oxide impurities in the aluminizing liquid; and the aluminizingliquid is used for a hot dip aluminum plating process so that the adhesion between a plated workpiece and a plating is improved, and the corrosion-resisting property 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 devices made of metal materials are used in harsh environments such as the ocean, such as heavily polluted industrial atmospheres, marine atmospheres, and humid atmospheres, they are affected by various corrosion effects such as sunlight, wave erosion, and salt spray. Corrosion problems are quite serious and cause serious economic losses. For a long time, people have been looking for various methods to reduce the damage caused by corrosion, such as spraying paint on the surface of the device, applying protective coatings and other methods for protection. [0003] For example, the currently commonly used hot-dip aluminum plating method applies a layer of aluminum or alum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/12C23C2/26C23C2/02C23C2/30
Inventor 周明杰李里
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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