Lamina wear-resisting phosphorization agent and preparation method thereof

A preparation method and technology of phosphating solution, applied in the field of phosphating solution, can solve the problems of low hardness, low wear resistance, too thick film layer, etc., and achieve moderate film thickness, extended wear life and long service life Effect

Active Publication Date: 2010-07-28
WUHAN MARINE MACHINERY PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects and problems existing in the prior art that contain toxic substances and the film layer is too thick, the hardness is not strong, and the wear resistance is not high. Provide a thin-layer wear-resistant phosphating solution with moderate film layer, strong hardness, high wear resistance, and no toxic substances and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A 1000l thin-layer wear-resistant phosphating solution, the composition and content of the phosphating solution are: 50000g of Maziv salt, 1700ml of phosphoric acid with a concentration of 84% by volume, 3000g of nickel nitrate, 3000g of calcium nitrate, and zinc nitrate 500g, iron filings 5000g, citric acid 1000g, and the balance is water.

[0047] The total acidity of the above-mentioned phosphating solution is 48.5, the free acidity is 7.0, and the ratio of the total acidity to the free acidity is 6.9:1.

[0048] A preparation method of the above-mentioned thin-layer wear-resistant phosphating solution, the preparation method is carried out sequentially according to the following steps:

[0049] Step 1: Weigh 45,000g of Mariv salt and put it into 800l of water at 70°C for dissolving. After dissolving, add water to 1000l, and then heat the solution to boiling;

[0050] Second step: the above-mentioned boiling solution is naturally cooled, and when cooled to 70° C., 5...

Embodiment 2

[0053] A 1000l thin-layer wear-resistant phosphating solution. The composition and content of the phosphating solution are: 48000g of Maziv salt, 1500ml of phosphoric acid with a concentration of 84% by volume, 3000g of nickel nitrate, 6000g of calcium nitrate, and zinc nitrate 1300g, iron filings 4000g, citric acid 1200g, and the balance is water.

[0054] The total acidity of the above-mentioned phosphating solution is 49, the free acidity is 7.1, and the ratio of the total acidity to the free acidity is 6.9:1.

[0055] A preparation method of the above-mentioned thin-layer wear-resistant phosphating solution, the preparation method is carried out sequentially according to the following steps:

[0056] Step 1: First weigh 44,000g of Mariv salt and put it into 800l of water at 70°C for dissolution. After the dissolution is complete, add water to 1,000l, and then heat the solution to boiling;

[0057] Second step: above-mentioned boiling solution is carried out natural coolin...

Embodiment 3

[0060] A 1000l thin-layer wear-resistant phosphating solution, the composition and content of the phosphating solution are: 50000g of Maziv salt, 1000ml of phosphoric acid with a concentration of 84% by volume, 3000g of nickel nitrate, 3000g of calcium nitrate, and zinc nitrate 500g, iron filings 3000g, citric acid 1000g, and the balance is water.

[0061] The total acidity of the above-mentioned phosphating solution is 49.0, the free acidity is 7.2, and the ratio of the total acidity to the free acidity is 6.8:1.

[0062] A preparation method of the above-mentioned thin-layer wear-resistant phosphating solution, the preparation method is carried out sequentially according to the following steps:

[0063] Step 1: Weigh 43,000g of Mariv salt and put it into 800l of water at 70°C for dissolving. After dissolving, add water to 1000l, and then heat the solution to boiling;

[0064] Second step: above-mentioned boiling solution is carried out natural cooling, adds iron filings 300...

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Abstract

The invention relates to a lamina wear-resisting phosphorization agent and a preparation method thereof. The phosphorization agent has the following components and contents: 45-50g/l of manganous salt, 1-2ml/l phosphoric acid, 2-4g/l of nickel nitrate, 2-10g/l of nitrate of lime, 0.5-2g/l of zinc nitrate, 3-5g/l of scrap iron, 1-3g/l of citric acid, moderate amount of manganese carbonate for adjusting free acidity and the balance of water; total acidity of the phosphorization stands at 45-50 points, free acidity stands at 6.5-7.5 points and the proportion of the total acidity to the free acidity is 6:1 to 7:11.When the phosphorization agent is prepared, 40-45g/l of manganous salt is weighed and placed in water of 70 DEG C to be dissolved; water is supplemented after the manganous salt is completely dissolved; then the mixed solution is heated to boiling state and then cooled to 70 DEG C before adding 3-5g/l of scrap iron for carrying out reaction for 30-45min; then 0.5-2.0ml/l of phosphoric acid is added; sampling analysis is carried out and acidity of the solution is adjusted; then 2-4g/l of nickel nitrate, 2-10g/l of nitrate of lime, 0.5-2g/l of zinc nitrate are added; sampling analysis is carried out and acidity of the solution is adjusted again; after testing is passed, 1-3g/l of citric acid is added to obtain the phosphorization agent.

Description

technical field [0001] The invention relates to a phosphating solution, in particular to a thin-layer wear-resistant phosphating solution and a preparation method thereof, which is particularly suitable for reducing friction and lubricating the relative movement parts between gear meshing surfaces, motor casings and blades. Background technique [0002] Phosphating solution can be used for surface treatment of steel. After the steel is phosphating in a phosphating solution containing manganese and zinc, a uniform and dense crystalline phosphating film can be formed on the surface of the steel, which can improve the wear resistance of the steel and prolong the service life of the steel, so phosphating Fluids are widely used in the surface treatment of parts on aircraft, automobiles, gearboxes, transfer cases and various gears. [0003] The Chinese patent publication number is CN101063199, and the invention patent disclosed on October 31, 2007 discloses a manganese-based phos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/13C23C22/18
Inventor 张春晖
Owner WUHAN MARINE MACHINERY PLANT
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