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Phosphating solution for alloy steel and phosphorization technology thereof

A phosphating solution and alloy steel technology, applied in the direction of metal material coating process, can solve the problems of inability to eliminate the influence, the influence of the alloy steel material, and the lack of environmental protection, and achieve the phosphating film thickness, short time, and good phosphating effect. Effect

Inactive Publication Date: 2013-12-25
宜昌华益工具制造股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are obvious defects when the traditional phosphating solution formula is applied to alloy steel materials: first, pickling is required in the traditional process, which will affect the alloy steel material and is not environmentally friendly; second, when the alloy steel material contains Cr, When Mn is used, the traditional phosphating formula cannot eliminate the influence of Cr and Mn elements on the phosphating reaction during the phosphating process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: a kind of phosphating solution for alloy steel material, the formula of this phosphating solution is

[0028] Zn(H 2 PO 4 ) 2 70g / L,

[0029] Ni (NO 3 ) 2 7g / L,

[0030] Zn(NO 3 ) 2 100g / L,

[0031] Mn(NO 3 ) 2 30g / L;

[0032] The free acid of the phosphating solution is adjusted to 6-10, the total acidity is 55-70, the temperature is kept at 75-80° C., and the solvent is water.

[0033] The process of carrying out phosphating of the alloy steel material using the phosphating solution obtained above comprises the following steps:

[0034] 1) Wash the 42CrMo steel material first, then degrease and degrease, and then wash twice, one for running water for 1 minute, and the other for soaking and washing for 2 minutes;

[0035] 2) Adjust the surface of the steel material at 35-45°C for 1min-3min with the surface adjustment solution. When the steel material comes out of the tank, it feels sticky and the surface is smoot...

Embodiment 2

[0040] A kind of phosphating process of alloy steel material, concrete steps are:

[0041] 1) Wash the alloy steel material (20CrMoTi) with water first, then degrease and degrease, and then wash with water twice, one is running water for 1 minute, and the other is soaking and washing for 2 minutes;

[0042] 2) Adjust the surface of the steel material at 35-45°C for 1min-3min with the surface adjustment solution. When the steel material comes out of the tank, it feels sticky and the surface is smooth; the specific formula of the surface adjustment solution is the weight ratio of phosphoric acid: nickel nitrate: complexing agent The ratio is 1:2:0.5, and the complexing agent is tartaric acid.

[0043] 3) Neutralization: Neutralize the surface-adjusted steel material with saponification solution for 1-2 minutes;

[0044] 4) Phosphating: prepare phosphating solution, which contains

[0045] Zn(H 2 PO 4 ) 2 90g / L,

[0046] Ni (NO 3 ) 2 7g / L,

[0047] Zn(NO 3...

Embodiment 3

[0052] A kind of phosphating process of alloy steel material, concrete steps are:

[0053] 1) First wash the nickel alloy steel material with water, then degrease and degrease, and then wash twice, one for running water for 1 minute, and the other for soaking and washing for 2 minutes;

[0054] 2) Adjust the surface of the steel material at 35-45°C for 1min-3min with the surface adjustment solution. When the steel material comes out of the tank, it feels sticky and the surface is smooth; the specific formula of the surface adjustment solution is the weight ratio of phosphoric acid: nickel nitrate: complexing agent The ratio is 1:2:0.5, and the complexing agent is citric acid.

[0055] 3) Neutralization: Neutralize the surface-adjusted steel material with saponification solution for 1-2 minutes;

[0056] 4) Phosphating: prepare phosphating solution, which contains

[0057] Zn(H 2 PO 4 ) 2 80g / L,

[0058] Ni (NO 3 ) 2 7g / L,

[0059] Zn(NO 3 ) 2 ...

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Abstract

Provided is a phosphorization technology of an alloy steel material. The alloy steel material after phosphorization is obtained through washing, oil removing and grease removing, washing, surface adjustment, phosphorization, washing and drying. A phosphating solution comprises 70-90g / L of Zn (H2PO4), 7g / L of Ni (NO3)2, 80-100g / L of Zn (NO3)2, and 20-30g / L of Mn (NO3)2. Free acid of the phosphating solution is adjusted to be 6-10, the total acidity of the phosphating solution is 55-70, and the temperature of the phosphating solution is 75-80 DEG C. According to the phosphating solution, acid pickling is not needed in the phosphorization process, and the environment can be protected; the influence on a phosphorization reaction in the phosphorization process of Cr and Mn can be eliminated. According to the phosphorization technology, in surface conditioning, specific reagents are added, the steel material surface can be effectively activated, a black film is formed, and therefore the phosphorization process is stable.

Description

technical field [0001] The invention belongs to the field of metal products, and in particular relates to a phosphating solution of an alloy steel material and a specific phosphating process thereof. Background technique [0002] The phosphating process is the process of removing oil, degreasing and cleaning the oil and other dirt on the surface of the workpiece. After chemical reaction, it plays the role of rust prevention and wear resistance. [0003] There are obvious defects when the traditional phosphating solution formula is applied to alloy steel materials: first, pickling is required in the traditional process, which will affect the alloy steel material and is not environmentally friendly; second, when the alloy steel material contains Cr, When Mn is used, the traditional phosphating formula cannot eliminate the influence of Cr and Mn elements on the phosphating reaction during the phosphating process. Contents of the invention [0004] The object of the present...

Claims

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Application Information

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IPC IPC(8): C23C22/18
Inventor 李书益郑大林周晋华
Owner 宜昌华益工具制造股份有限公司
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