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Hot dip galvanizing processing technology

A processing technology, hot-dip galvanizing technology, applied in hot-dip plating process, metal material coating process, coating and other directions, can solve the problems of easy color difference on the surface of the workpiece, difficult to meet the zinc layer thickness, and high qualification rate of the workpiece. Achieve the effect of good galvanizing effect, reducing the thickness of zinc layer and high product quality

Inactive Publication Date: 2018-04-20
浙江金盛钢管塔有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing hot-dip galvanizing process, the adhesion of the plating solution on the workpiece is poor, the thickness of the zinc layer is difficult to meet the standard, the pass rate of the workpiece is high, rework or multiple processing is often required, and the efficiency is low
And after the plating solution is attached to the workpiece, the uniformity is not high, the surface of the workpiece is prone to color difference, and it is also easy to form a dark gray coating

Method used

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  • Hot dip galvanizing processing technology
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Examples

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Effect test

Embodiment 1

[0030] Such as figure 1As shown, a hot-dip galvanizing process includes the following steps: (1) Degreasing: place the workpiece to be processed in a degreasing solution for 20 minutes, and the temperature of the degreasing solution is 80°C during degreasing; specifically, the degreasing solution It is prepared by mixing degreasing agent and water at a ratio of 1:20; the degreasing agent is composed of components in proportion by weight: 10 parts of sodium carbonate, 2.5 parts of surfactant, 4 parts of trisodium phosphate; (2) acid Washing: Wash the workpiece with hydrochloric acid solution for 35 minutes, and then rinse the workpiece with clean water. The concentration of the above hydrochloric acid solution is 10mol / L; (3) Waste liquid neutralization: the water used to wash the workpiece in step (2) flows to the neutralization tank After the neutralization reaction, it is discharged to the outside. Specifically, the solution in the neutralization pool is sodium hydroxide sol...

Embodiment 2

[0037] A hot-dip galvanizing process, comprising the following steps: (1) Degreasing: place the workpiece to be processed in a degreasing solution for 30 minutes, and the temperature of the degreasing solution is 85°C during degreasing; specifically, the degreasing solution is made of a degreasing agent It is prepared by mixing with water at a ratio of 1:20; the degreasing agent is composed of components in proportion by weight: 20 parts of sodium carbonate, 4.5 parts of surfactant, and 6 parts of trisodium phosphate; (2) pickling: use Wash the workpiece with hydrochloric acid solution for 40 minutes, and then rinse the workpiece with clean water. The concentration of the above hydrochloric acid solution is 10mol / L; (3) Waste liquid neutralization: the water used to wash the workpiece in step (2) flows to the neutralization tank for neutralization After the reaction, it is discharged to the outside. Specifically, the solution in the neutralization pool is a sodium hydroxide sol...

Embodiment 3

[0041] A hot-dip galvanizing process, comprising the following steps: (1) Degreasing: place the workpiece to be processed in a degreasing solution for 25 minutes, and the temperature of the degreasing solution is 85°C during degreasing; specifically, the degreasing solution is made of a degreasing agent It is prepared by mixing with water at a ratio of 1:20; the degreasing agent is composed of components in parts by weight: 20 parts of sodium carbonate, 3 parts of surfactant, and 5 parts of trisodium phosphate; (2) pickling: use Wash the workpiece with hydrochloric acid solution for 40 minutes, and then rinse the workpiece with clean water. The concentration of the above hydrochloric acid solution is 10mol / L; (3) Waste liquid neutralization: the water used to wash the workpiece in step (2) flows to the neutralization tank for neutralization After the reaction, it is discharged to the outside. Specifically, the solution in the neutralization pool is a sodium hydroxide solution, ...

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Abstract

The invention discloses a hot dip galvanizing processing technology. The hot dip galvanizing processing technology comprises the following steps that 1, a workpiece is degreased; 2, the workpiece is washed by using a hydrochloric acid solution for 35-40 minutes, and then is washed by using clear water; 3, after the water flow for washing the workpiece in the step 2 flows into a neutralization tankto perform neutralization reaction, the water flow is discharged into the outside; 4, plating assistance is carried out, wherein the workpiece is placed in a plating assistance solution with the temperature of 60-80 DEG C for 10-12 seconds; 5, drying is carried out, wherein the workpiece is dried in a drying chamber with the temperature of 130-140 DEG C for 1-2 minutes, and moisture on the surface of the workpiece is removed; 6, hot dip plating is carried out; and 7, cooling is carried out. According to the hot dip galvanizing processing technology, Al and Ni are added into a plating solution, so that the product quality is effectively improved, and the hot dipping efficiency is high; and then, before hot dip plating, the workpiece firstly reacts with the plating assistance solution, so that the surface of the workpiece is activated, the adhesive force of a zinc layer is increased, the quality of the workpiece is improved, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of hot-dip galvanizing, and in particular relates to a hot-dip galvanizing process. Background technique [0002] Hot-dip galvanizing is to make the molten metal react with the iron substrate to produce an alloy layer, so that the substrate and the coating are combined. In the existing hot-dip galvanizing process, the adhesion of the plating solution on the workpiece is poor, the thickness of the zinc layer is difficult to meet the standard, the pass rate of the workpiece is high, rework or multiple processing is often required, and the efficiency is low. And after the plating solution is attached to the workpiece, the uniformity is not high, the surface of the workpiece is prone to color difference, and it is also very easy to form a dark gray coating. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the invention provides a hot-dip galvanizing process with high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/02C22C18/00
CPCC23C2/06C22C18/00C23C2/003C23C2/02
Inventor 李斌陈榆锋
Owner 浙江金盛钢管塔有限公司
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