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A kind of slag-free low-temperature rapid electrolytic phosphating solution and its phosphating process

An electrolytic phosphating solution and electrolytic phosphating technology, applied in the field of electrolytic phosphating solution, can solve the problems affecting the stability of the solution and producing solid waste residue, and achieve the effects of meeting the requirements of industrial production, preventing pollution and reducing consumption

Active Publication Date: 2018-04-27
派诺(湖北)绿色化学智造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the selection of zinc or iron as the anode, zinc or iron dissolves into the treatment bath during the electrolysis process, and zinc sludge and phosphating slag are easily produced, which not only produces solid waste residue, but also affects the stability of the solution.

Method used

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  • A kind of slag-free low-temperature rapid electrolytic phosphating solution and its phosphating process

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Embodiment 1

[0031] A slag-free low-temperature rapid electrolytic phosphating solution and phosphating process, including zinc ions 10g / L, calcium ions 2g / L, phosphate 10g / L, nitrate 40g / L, nitroguanidine 2g / L and nickel 0.1g / L, for 70# steel wire with a wire diameter of 3.0mm, the phosphating temperature is 45°C, the phosphating time is 120 seconds, and the current density is 3A / dm 2 , the film weight after phosphating is 4g / m 2 , the phosphating film is complete, and the color is gray and black.

Embodiment 2

[0033] A slag-free low-temperature rapid electrolytic phosphating solution and phosphating process, including zinc ions 30g / L, calcium ions 2g / L, phosphate 60g / L, nitrate 90g / L, hydroxylamine sulfate 5g / L, chlorate 2g / L L and nickel 1g / L, used for 70# steel wire with a wire diameter of 3.0mm, phosphating temperature 45°C, phosphating 60 seconds, current density 5A / dm 2 , the film weight after phosphating is 10g / m 2 , the phosphating film is complete, and the color is black.

Embodiment 3

[0035] A slag-free low-temperature rapid electrolytic phosphating solution, containing zinc ions 80 / L, phosphate 120g / L, nitrate 150g / L, hydroxylamine sulfate 10g / L, citric acid 5g / L, nickel 3g / L and magnesium 7g / L L, for 70# steel wire with a wire diameter of 3.0mm, the temperature of the phosphating solution is 45°C, phosphating for 5 seconds, and the current density is 20A / dm 2 , the film weight after phosphating is 14.7g / m 2 , the phosphating film is complete, and the color is gray and black.

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Abstract

The invention provides a slag-free low-temperature rapid electrolytic phosphating solution and a phosphating process thereof. The phosphating solution contains zinc ions, phosphate radicals, accelerators, organic acids and dissolved metal elements, and its mass components are as follows: zinc ions 10-80g / L, phosphate radicals 10-120g / L, accelerators 41-160g / L , organic acid 0‑5g / L, dissolved metal elements 0.1‑10g / L, where phosphate is calculated as P2O5. This process uses an inert titanium plate or mesh as the positive electrode, and the treated steel wire as the negative electrode. A certain current is applied to form a uniform zinc phosphate film on the surface of the steel wire. The film weight reaches more than 4g / m2, which meets the drawing requirements. The phosphating temperature of the invention is 10-60 DEG C, the phosphating time is 5-120 seconds, and no phosphating slag is generated, so it has the obvious advantages of high efficiency, energy saving and environmental protection.

Description

technical field [0001] The invention mainly relates to an electrolytic phosphating solution for rapidly forming a zinc phosphate film on the surface of a metal wire rod at low temperature and its application process, and is mainly used for phosphating treatment before steel wire rod drawing. Background technique [0002] Phosphating treatment refers to the process of treating metal in a solution containing phosphate to form a phosphate chemical conversion film on the surface of the metal. For more than 100 years, phosphating film can be applied to steel, aluminum, magnesium and other metals or alloys, which can not only improve the corrosion resistance, improve the adhesion between the substrate and the coating, but also significantly improve the surface friction properties of the workpiece. Improve the cold workability of the material. The zinc phosphate conversion coating layer has good ductility, and can react with sodium stearate under certain conditions to form a zinc ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/36
Inventor 季华
Owner 派诺(湖北)绿色化学智造有限公司
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