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Coating thickness reduction ammonium salt-free plating auxiliary for hot galvanizing by solvent method

A technology of hot-dip galvanizing and fluxing agent, applied in hot-dip galvanizing process, coating, metal material coating process, etc., to achieve the effects of preventing over-thickness, reducing production cost, and simple production process

Active Publication Date: 2014-07-23
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is, in order to solve the problem of pollution and over-thickness of the coating during solvent hot-dip galvanizing, the present invention provides a kind of non-ammonium salt coating thickness reduction and help plating agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this embodiment, the solvent-based hot-dip galvanizing flux adopts the following composition content:

[0025] ZnCl 2 : 120g / L;

[0026] NaCl: 10g / L;

[0027] MgCl 2 : 2g / L;

[0028] KCl: 2g / L;

[0029] Oleic acid 1g / L;

[0030] NiCl 2 : 8g / L;

[0031] The rest is water.

[0032] Adopt the hot-dip galvanizing process of plating flux of the present invention to comprise following operation:

[0033] (1) Pre-plated parts are degreased, pickled and washed with water;

[0034] (2) Add the plating flux according to the optimal composition content and put it into the pool;

[0035] (3) Soak the pre-plated parts in the flux pool for 80-90 seconds, and the flux temperature is 55-60°C;

[0036] (4) Dry the pre-plated parts after fluxing at 80°C;

[0037] (5) Dip the pre-coated parts into the zinc pot, the temperature of the zinc liquid is 455-465°C, and the soaking time is 1-3 minutes;

[0038] (6) Take the plated parts out of the pan and cool.

[0039] The adva...

Embodiment 2

[0041] In this embodiment, the solvent-based hot-dip galvanizing flux adopts the following composition content:

[0042] ZnCl 2 : 120g / L;

[0043] NaCl: 30g / L;

[0044] MgCl 2 : 4g / L;

[0045] KCl: 3g / L;

[0046] Oleic acid: 2g / L;

[0047] NiCl 2 : 8g / L;

[0048] The rest is water.

[0049] Adoption process is identical with embodiment 1.

[0050] The advantages of this embodiment are: the production process of the fluxing agent is simple, a uniform passivation film is formed on the pre-coated part, no dense smoke and missing plating phenomenon, the coating surface is bright, and the alloy layer in the zinc layer is thinned , The coating is thinned by more than 60%, reducing zinc consumption and saving costs.

Embodiment 3

[0052] When the solvent method hot-dip galvanizing flux in this embodiment adopts the optimal composition content:

[0053] ZnCl 2 : 120g / L;

[0054] NaCl: 20g / L;

[0055] MgCl 2 : 4g / L;

[0056] KCl: 2g / L;

[0057] Oleic acid 5g / L;

[0058] NiCl 2 : 8g / L;

[0059] The rest is water.

[0060] Adoption process is identical with embodiment 1.

[0061] Its advantages are: the production process of the fluxing agent is simple, a uniform passivation film is formed on the pre-coated parts, there is no dense smoke and missing plating during hot-dip, the surface of the coating is bright, the alloy layer in the zinc layer is thinned, and the coating is reduced More than 70% thinner, reducing zinc consumption and saving costs.

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Abstract

The invention relates to coating thickness reduction ammonium salt-free plating auxiliary for hot galvanizing by a solvent method. The plating auxiliary comprises the following components: 80-140g / L of ZnCl2, 5-60g / L of NaCl, 1-5g / L of MgCl2, 1-6g / L of KCl, 2-6g / L of oleic acid, 2-10g / L of NiCl2 and the balance of water. The plating auxiliary provided by the invention can solve the problem of pollution and super-thick coating during hot galvanizing by the solvent method. The plating auxiliary provided by the invention is simple in production process, and a uniform solvent film is formed on a pre-plating piece. During hot galvanizing, dense smoke and skip plating are avoided, the coating is bright in surface, the alloy layer in the zinc layer is thinned and the coating is thinned by over 50%, so that the zinc consumption and cost are reduced. The plating auxiliary provided by the invention is suitable for an ammonium salt-free plating assistant process for hot galvanizing by the solvent method with the thinned coating.

Description

[0001] technical field [0002] The invention relates to a coating thinning non-ammonium salt fluxing agent for hot-dip galvanizing by solvent method, which belongs to the technical field of metal surface treatment. Background technique [0003] Hot-dip galvanizing is a kind of iron and steel workpiece (such as steel plate, steel structure or other steel parts, etc.) immersed in the molten zinc solution for a period of time, during which the iron and the zinc solution are dissolved, chemically A protective method for adhering a layer of zinc on the surface by means of reaction and diffusion. It has always been the most economical and effective surface treatment method to prevent steel from corroding in the natural environment. It is widely used in the protection of various structures of steel materials. More than 50% of the global metal zinc consumption is used for steel protective coatings. [0004] So far, the hot-dip galvanizing of steel parts is basically carried out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/30
Inventor 江社明唐囡张启富涂湛胡春东邓静伟李远鹏王贺贺
Owner STATE GRID CORP OF CHINA
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