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Phosphorizing liquid and production method thereof

A phosphating solution and phosphoric acid technology, which is applied in the coating process of metal materials, etc., can solve the problems of not being able to adapt to new situations, long phosphating time, and complicated procedures, and achieve fast film formation, process saving, and corrosion resistance. Good results

Inactive Publication Date: 2012-09-26
XIAMEN GUANDAXIN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The phosphating process of iron and steel parts is mostly medium-high temperature phosphating, which requires degreasing and rust pretreatment before treatment, and the temperature is high, energy consumption is high, phosphating time is long, and the process is complicated
In addition, the most commonly used methods of phosphating are spraying or soaking. With the expansion of the application field of phosphating, these methods can no longer adapt to the new situation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The novel green normal temperature fast phosphating solution of the present invention is composed of the following materials by weight percentage:

[0024] Phosphoric acid 20%

[0025] Zinc Oxide 0.1%

[0026] Compound organic acid film-forming aid 0.001%

[0027] Ethanol 8%

[0028] Sodium molybdate 0.15%

[0029] Sodium Fluoride 0.1%

[0030] Copper sulfate 0.1%

[0031] Polyethylene glycol 400 0.002%

[0032] Demineralized water balance

[0033] The preparation method of every 100kg of phosphating solution is as follows: First, dissolve 0.001kg of compound organic acid film-forming aid in 8kg of ethanol for later use, and record it as solution I. Mix 0.1kg of zinc oxide and appropriate amount of water into a paste, add 20kg of phosphoric acid until completely dissolved, then add 0.15kg of sodium molybdate, 0.1kg of sodium fluoride, 0.1kg of copper sulfate, 0.002kg of polyethylene glycol 400, and stir Uniform, recorded as II solution. Add the I solution into ...

Embodiment 2

[0035] The novel green normal temperature fast phosphating solution of the present invention is made up of following materials by weight percentage:

[0036] Phosphoric acid 25%

[0037] Zinc Oxide 0.2%

[0038] Compound organic acid film-forming aid 0.02%

[0039] Ethanol 10%

[0040] Sodium molybdate 0.3%

[0041] Sodium Fluoride 0.2%

[0042] Nickel acetate 0.15%

[0043] Polyethylene glycol 2000 0.003%

[0044] Demineralized water balance

[0045] The preparation method of every 100kg of phosphating solution is as follows: First, dissolve 0.02kg of compound organic acid film-forming aid in 10kg of ethanol for later use, and record it as solution I. Mix 0.2kg of zinc oxide and appropriate amount of water into a paste, add 25kg of phosphoric acid until completely dissolved, then add 0.3kg of sodium molybdate, 0.2kg of sodium fluoride, 0.15kg of nickel acetate, 0.003kg of polyethylene glycol 2000, and stir Uniform, recorded as II solution. Add the I solution into t...

Embodiment 3

[0047] The novel green normal temperature fast phosphating solution of the present invention is made up of following materials by weight percentage:

[0048] Phosphoric acid 30%

[0049] Zinc Oxide 0.3%

[0050] Compound organic acid film-forming aid 0.04%

[0051] Ethanol 12%

[0052] Sodium molybdate 0.4%

[0053] Sodium Fluoride 0.3%

[0054] Nickel nitrate 0.2%

[0055] Polyethylene glycol 6000 0.004%

[0056] Demineralized water balance

[0057]The preparation method of every 100kg of phosphating solution is as follows: First, dissolve 0.04kg of compound organic acid film-forming aid in 12kg of ethanol for later use, and record it as solution I. Mix 0.3kg of zinc oxide and appropriate amount of water into a paste, add 30kg of phosphoric acid until completely dissolved, then add 0.4kg of sodium molybdate, 0.3kg of sodium fluoride, 0.2kg of nickel nitrate, 0.004kg of polyethylene glycol 6000, and stir Uniform, recorded as II solution. Add the I solution into the II...

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Abstract

The invention belongs to the technical field of chemical treatment of metal surfaces and particularly relates to a novel green normal-temperature rapid phosphorizing liquid suitable for phosphorizing treatment on the surface of a steel member. The phosphorizing liquid integrates the functions of oil removing, derusting, phosphorizing and passivating and is suitably applied to automobiles, large iron stands and other equipment under severe outdoor environment. The phosphorizing liquid is composed of the following substances in percentage by mass: 20-30% of phosphoric acid, 0.1-0.3% of zinc oxide, 0.001-0.04% of composite organic-acid film-forming aid, 8-12% of organic solvent, 0.15-0.4% of sodium molybdate, 0.1-0.3% of grain refiner, 0.1-0.2% of inert metal salt, 0.002-0.004% of nonionic surfactant and the balance of softened water. The phosphorizing liquid disclosed by the invention has the advantages that operation is simple, film forming strength is high, binding force is strong and corrosion resistance is good.

Description

technical field [0001] The invention relates to a metal surface chemical treatment solution, in particular to a phosphating solution suitable for phosphating treatment on the surface of large outdoor steel parts. Background technique [0002] In order to improve the anti-rust ability of the surface of steel parts, the surface is usually phosphating. The phosphating film is mainly used as the bottom layer of the coating, the lubricating layer and the metal surface protection layer during metal cold working, etc., which can play various functions such as anti-rust, wear-reducing and wear-resistant, lubricating, and improving the adhesion between the coating and the metal substrate. [0003] The phosphating process for iron and steel parts is mostly medium-high temperature phosphating, which requires degreasing and rust pretreatment before treatment, and the temperature is high, energy consumption is high, phosphating time is long, and the process is complicated. In addition, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/42C23C22/44
Inventor 林丹赵梓岑
Owner XIAMEN GUANDAXIN ENVIRONMENTAL PROTECTION TECH
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