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Plating assistant solution and hot galvanizing process using plating assistant solution

A technology of plating flux and hot-dip galvanizing, which is applied in hot-dip plating process, metal material coating process, coating, etc., which can solve the problem of uneven bonding strength on the surface of workpieces, uneven adhesion on the surface of workpieces, and easy corrosion of plated parts and other problems, to achieve the effect of small thickness, stable plating solution, and reduced contamination

Active Publication Date: 2021-01-15
余姚市永林机械科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the early stage of hot-dip galvanizing, the concentration of zinc ions and iron ions is too high in the process of activating the workpiece into the activation solution, which will easily cause uneven adhesion on the surface of the workpiece. Plated parts are easily corroded and the surface is rough, which cannot meet the needs of various fields

Method used

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  • Plating assistant solution and hot galvanizing process using plating assistant solution
  • Plating assistant solution and hot galvanizing process using plating assistant solution
  • Plating assistant solution and hot galvanizing process using plating assistant solution

Examples

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Effect test

Embodiment 1

[0048] A kind of plating flux solution, prepare with following method: 0.2mol ferrous chloride, 0.2mol zinc chloride, 0.1mol zinc phosphate and 0.1mol sodium silicate are joined in the ammonium chloride solution that concentration is 0.01mol / L, Stir well, let stand for 30min, add ammonia water, adjust pH to 5.

[0049] A hot-dip galvanizing process, comprising the steps of:

[0050] S1: Chemical degreasing, using degreasing liquid to degrease the grease attached to the surface of the metal workpiece. The degreasing liquid is a commercial product of Shenzhen Tianyue New Material Technology Co., Ltd., an environmentally friendly phosphorus-free degreasing powder, and the dosage is 80g / L, the temperature of the degreasing liquid is 65°C, the residence time is 10min, and the degreasing workpiece is obtained after degreasing;

[0051] S2: Pickling, put the workpiece degreased in S1 into a pool filled with dilute HCl solution to remove the rust products and oxide film on the metal ...

Embodiment 2

[0058]A hot-dip galvanizing process, based on the basis of embodiment 1, the difference is that ferrous chloride is 0.3mol, zinc chloride is 0.3mol, and zinc phosphate is 0.3mol in the raw material of each 1L described fluxing solution , the concentration of ammonium chloride is 0.03mol / L, and sodium silicate is 0.2mol.

Embodiment 3

[0060] A hot-dip galvanizing process, based on the basis of embodiment 1, the difference is that ferrous chloride is 0.25mol, zinc chloride is 0.25mol, and zinc phosphate is 0.2mol in the raw material of each 1L described fluxing solution , the concentration of ammonium chloride is 0.02mol / L, and sodium silicate is 0.15mol.

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Abstract

The invention relates to the field of hot dipping, in particular to a plating assistant solution and a hot galvanizing process using the plating assistant solution. The plating assistant solution solves the problems that when a workpiece is put into an activating solution to be activated, concentrations of zinc ions and iron ions are large, uneven adhesion of the surface of the workpiece is easilycaused, a bonding strength of the surface of the workpiece is uneven in a subsequent hot dipping process, and a plating piece is easily corroded. The plating assistant solution comprises the following components of the zinc ions, ferrous ions, zinc phosphate, ammonia water, ammonium chloride, sodium silicate and the like, the ammonia water and the zinc ions form a complex, the ferrous ions and phosphate form a complex, the complex slowly releases the zinc ions and the iron ions, so that the concentrations of the zinc ions and the iron ions in the plating assistant solution are kept balanced,and uniformity and flatness of a plating layer are further ensured. The invention further discloses a hot galvanizing process using the plating assistant solution, the hot galvanizing process comprises the steps of oil removal, acid pickling, hot galvanizing, activation and the like, and the plating piece with a uniform plating layer is obtained.

Description

technical field [0001] The application relates to the field of hot-dipping, and more specifically, it relates to a fluxing solution and a hot-dip galvanizing process using the fluxing solution. Background technique [0002] Hot-dip galvanizing is an effective metal anti-corrosion method, which is mainly used in metal structure facilities in various industries. It is to immerse the rust-removed steel parts in the molten zinc at about 500 ℃, so that the surface of the steel parts will be attached with a zinc layer, so as to achieve the purpose of anti-corrosion. [0003] The zinc-iron alloy layer has higher corrosion resistance and higher hardness than the pure zinc layer, and has finer and denser crystals than the zinc coating, and is widely used in automobiles and home appliances. However, in the early stage of hot-dip galvanizing, the concentration of zinc ions and iron ions is too high during the activation process of the workpiece into the activation solution, which may ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/12C23C22/13C23C2/02C23C2/06
CPCC23C22/12C23C22/13C23C2/02C23C2/06
Inventor 朱晓春
Owner 余姚市永林机械科技有限公司