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Plating auxiliary for plating alloy coating with high aluminum content on steel by using solvent method

A technology of alloy coating and solvent method, which is applied in hot-dip coating process, metal material coating process, coating, etc., can solve the problem that parts cannot be dip-plated with high aluminum content alloy coating, so as to avoid missed plating and good wetting properties, the effect of bright coating surface

Active Publication Date: 2014-09-10
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the problem that the solvent method hot-dip steel structure and parts cannot be dip-plated with high aluminum content alloy coating, and proposes a method suitable for Flux for hot-dip alloy coating with high aluminum content by solvent method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Sodium hydroxide: 1g / L;

[0032] Calcium chloride: 20g / L;

[0033] Potassium fluoride: 20g / L;

[0034] Lithium chloride: 3g / L

[0035] Sodium fluoroaluminate: 2g / L;

[0036] Potassium fluotitanate: 5g / L;

[0037] Nonionic surfactant: 1g / L;

[0038] The rest is water.

[0039] The above-mentioned components are prepared into a filter aid, which is characterized in that the production process of the plating aid is simple, and a uniform salt film is formed on the pre-plating piece. During hot-dip plating, it does not react with aluminum in the zinc bath, and the sodium fluoroaluminate in the flux can remove the aluminum oxide film on the surface of the zinc bath, avoiding missing plating, and the coating surface is bright.

[0040] The aluminum content range of the high aluminum alloy coating that this flux is suitable for is 0.1%~23% (mass percentage).

[0041] Example 2

Embodiment 2

[0043] Sodium hydroxide: 3g / L;

[0044] Calcium chloride: 30g / L;

[0045] Potassium fluoride: 30g / L;

[0046] Lithium chloride: 12g / L

[0047] Sodium fluoroaluminate: 5g / L;

[0048] Potassium fluotitanate: 8g / L;

[0049] Nonionic surfactant: 4g / L;

[0050] The rest is water.

[0051] The above-mentioned ingredients are prepared into a filter aid, which is characterized in that the production process of the plating aid is stable, a uniform salt film is formed on the pre-plated part, the plating aid is weakly acidic, and trace oxides on the surface are removed. During hot-dip plating, it does not react with aluminum in the zinc bath, and the sodium fluoroaluminate in the flux can remove the aluminum oxide film on the surface of the zinc bath, avoiding missing plating, and the coating surface is bright. It is fast and easy to float in the zinc alloy liquid in the plating flux, and avoid sticking to the steel surface.

[0052] The aluminum content range of the high aluminum...

Embodiment 3

[0055] Sodium hydroxide: 10g / L;

[0056] Calcium chloride: 40g / L;

[0057] Potassium fluoride: 40g / L;

[0058] Lithium chloride: 20g / L

[0059] Sodium fluoroaluminate: 12g / L;

[0060] Potassium fluotitanate: 30g / L;

[0061] Nonionic surfactant: 10g / L;

[0062] The rest is water.

[0063] The above-mentioned ingredients are prepared into a filter aid, which is characterized in that the production process of the plating aid is stable, a uniform salt film is formed on the pre-plated part, the plating aid is weakly acidic, and trace oxides on the surface are removed. During hot-dip plating, there will be a small amount of smoke, and the sodium fluoroaluminate in the flux can remove the aluminum oxide film on the surface of the zinc bath, avoiding missing plating, and the coating surface is bright. It is fast and easy to float in the zinc alloy liquid in the plating flux, and avoid sticking to the steel surface.

[0064] The aluminum content range of the high aluminum alloy co...

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Abstract

The invention discloses a plating auxiliary for plating an alloy coating with high aluminum content on steel by using a solvent method. According to a formula, the plating auxiliary comprises the concrete components according to the content (g / L): 20-60g / L of potassium borohydride, 1-10g / L sodium hydroxide, 20-40g / L of calcium chloride, 10-40g / L of potassium fluoride, 3-20g / L of lithium chloride, 2-12g / L of sodium fluoroaluminate, 5-30g / L of potassium fluotitanate, 1-10g / L of nonionic surfactant and the balance of water. The plating auxiliary disclosed by the invention is simple in production process and capable of forming a uniform salt film on a piece to be plated. During hot plating, the plating auxiliary is not reacted with aluminum in a zinc solution, and sodium fluoroaluminate in the plating auxiliary can be used for cleaning an alumina film on the surface of the zinc solution, so that the plating leakage phenomenon is avoided, and the surface of a coating is bright.

Description

technical field [0001] The invention relates to a plating flux suitable for hot-dip alloy coatings with high aluminum content by solvent method, which belongs to the technical field of metal coatings. Background technique [0002] With the process of industrialization, air pollution and acid rain deposition are becoming more and more common and frequent, and the resulting corrosion of steel has attracted more and more attention. How to adopt the most economical and effective way to protect steel from corrosion has become the focus of research. Hot-dip galvanizing and zinc-based alloys are the most mainstream surface treatment methods to prevent steel corrosion. They are widely used in the protection of various structures of steel materials. More than 50% of the global metal zinc consumption is used for steel protection. plating. [0003] Steel hot-dip galvanizing or zinc-based alloys can be divided into two types: gas reduction hot-dip hot-dip and solvent hot-dip hot-dip. ...

Claims

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Application Information

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IPC IPC(8): C23C2/06
Inventor 涂湛唐囡李远鹏江社明张启富王贺贺
Owner STATE GRID CORP OF CHINA
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