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A kind of plating flux and hot-dip galvanizing process using the flux

A technology of plating flux and hot-dip galvanizing, applied in hot-dip galvanizing process, metal material coating process, coating, etc., can solve problems such as unsatisfactory, rough surface, easy corrosion of plated parts, etc., and achieve practical and convenient maintenance , uniform coating, and reduce the effect of corrosion

Active Publication Date: 2022-02-11
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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  • A kind of plating flux and hot-dip galvanizing process using the flux
  • A kind of plating flux and hot-dip galvanizing process using the flux
  • A kind of plating flux and hot-dip galvanizing process using the flux

Examples

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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

This application relates to the field of hot-dip plating. This application relates to a plating flux and a hot-dip galvanizing process using the flux, which solves the problem that the concentration of zinc ions and iron ions is high when the workpiece is put into the activation solution for activation, which is easy to cause The surface of the workpiece is not evenly attached, the bonding strength of the workpiece surface is not uniform during the subsequent hot-dip process, and the plated parts are easily corroded. A plating aid solution is disclosed, whose components include zinc ions, ferrous ions, zinc phosphate, and ammonia water , ammonium chloride and sodium silicate, ammonia water and zinc ions form complexes, ferrous ions and phosphate form complexes, and the complexes slowly release zinc ions and iron ions, so that the zinc ions and iron ions in the fluxing solution The concentration is kept balanced, thereby ensuring the uniformity and smoothness of the coating; the application also discloses a hot-dip galvanizing process using the above plating flux, which includes steps such as degreasing, pickling, hot-dip, activation, etc., and obtains a more uniform coating plated parts.

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 Patents(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