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Method for hotly plating zinc and aluminum on surface of steel product

A technology of hot-dip galvanizing and products, applied in coatings, anti-corrosion coatings, epoxy resin coatings, etc., can solve the problem of poor heat resistance, corrosion resistance, adhesion and film-forming properties of coatings, environmental pollution, waste water, waste gas and Problems such as waste residue and inability to form zinc oxide layer, to achieve the effects of stable product quality, good bonding force, and real-time controllable coating performance

Inactive Publication Date: 2018-08-14
中山市普利斯顿化工科技有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hot-dip galvanizing is pure zinc plating, and its corrosion resistance is weak. Generally speaking, the neutral salt spray test does not exceed 500 hours; hot-dip galvanizing is an improved process of hot-dip galvanizing, and its corrosion resistance is significantly enhanced, but Due to the dense surface, a fluffy zinc oxide layer cannot be formed in the coating, and the effect of cathodic protection becomes poor
[0003] At present, the coating formed by hot-dip galvanized aluminum on the market has poor heat resistance, corrosion resistance, adhesion and film formation, and is easy to fall off.
Moreover, waste water, waste gas and waste residues that pollute the environment are produced during the production process.

Method used

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  • Method for hotly plating zinc and aluminum on surface of steel product
  • Method for hotly plating zinc and aluminum on surface of steel product
  • Method for hotly plating zinc and aluminum on surface of steel product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0046] The formula of table 1 embodiment 1-5 environment-friendly type zinc-aluminum plating solution

[0047]

[0048]

Embodiment 6

[0050] A method for hot-dip galvanized aluminum on the surface of steel products, comprising the following steps:

[0051] (1) Pre-treatment: Carry out degreasing and derusting treatment on steel products, specifically: first spray neutral treatment agent (thina water) to degrease, then mechanical sandblasting and derusting to Sa2.5 level, and finally manually polish and derust To St3 level, the derusting level is determined according to the provisions of the national standard GB / T 8923, wipe clean after treatment, and obtain pre-treated parts;

[0052] (2) Soaking: the workpiece after step (1) is placed in the plating solution tank that the zinc-aluminum plating solution of embodiment 1 is housed, after soaking for 5-10 seconds, drain unnecessary plating solution;

[0053] The plating solution tank is equipped with a stirring device, a viscosity monitoring device and a filtering device. The stirring device regularly stirs the plating solution to prevent precipitation; the vis...

Embodiment 7

[0057]Example 7 uses the zinc-aluminum plating solution of Example 2 to treat the surface of steel products, and the process of hot-dip galvanized aluminum is the same as that of Example 6.

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Abstract

The invention discloses a method for hotly plating zinc and aluminum on the surface of a steel product. The method comprises the following steps: (1) pre-treating: carrying out oil removal and rust removal treatment on the surface of the steel product and wiping and cleaning; (2) immersing: putting a workpiece treated by step (1) into a zinc and aluminum plating solution; after immersing for 5 to10 seconds, draining; (3) baking: transferring the workpiece treated by step (2) into a baking device and baking; (4) naturally cooling to room temperature and packaging to obtain a finished product.The method disclosed by the invention has a simple technology and no emission of VOC (Volatile Organic Compounds); automatic line production can be realized and the performance of a plated layer is controllable in real time; a finished product has stable quality and high yield; parts which are difficultly electroplated with zinc, such as deep holes, slits and pipe fitting inner walls, also can beuniformly coated and plated; the method is especially applicable to surface protection of abnormal-shape members including lamp rods, steel pipes, parts and the like.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, in particular to a method for hot-dip galvanized aluminum on the surface of iron and steel products. Background technique [0002] Iron and steel products are widely used in national production and life. When used in the atmosphere, soil, seawater and other environmental conditions, they will be oxidized and corroded to varying degrees, resulting in serious economic losses and waste of natural resources and energy. Hot-dip galvanizing is a commonly used method to prevent corrosion, usually there are hot-dip galvanizing, hot-dip galvanizing and other methods. Hot-dip galvanizing is pure zinc plating, and its corrosion resistance is weak. Generally speaking, the neutral salt spray test does not exceed 500 hours; hot-dip galvanizing is an improved process of hot-dip galvanizing, and its corrosion resistance is significantly enhanced, but Due to the dense surface, a fluffy zinc oxide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/10C09D7/61C09D7/63C09D7/65
Inventor 黄钰海
Owner 中山市普利斯顿化工科技有限公司
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