Chemical plating liquid of high-phosphor chemical plating Ni-P alloy for use on 304 stainless steel surface

A 304 stainless steel, electroless plating technology, applied in the field of electroless plating solution, can solve the problems of insufficient mechanical strength, poor corrosion and wear resistance, etc., and achieve the goal of improving corrosion and wear resistance and expanding the application field Effect

Inactive Publication Date: 2007-08-29
CHINA NATIONAL HEAVY DUTY TRUCK GROUP
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  • Abstract
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Problems solved by technology

[0003] However, using the existing electroless plating solution, the Ni-P alloy generated on the surface of 304 stainless steel is resistant to Cl - The corrosion and wear resistance are poor, and the mechanical strength cannot meet the requirements

Method used

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  • Chemical plating liquid of high-phosphor chemical plating Ni-P alloy for use on 304 stainless steel surface

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Embodiment Construction

[0028] The present invention will be specifically described below in conjunction with specific embodiments.

[0029] The implementation process of the present invention is strictly controlled according to the technological process. After the pre-treatment of the stainless steel is qualified, flash nickel plating is carried out, and then chemical nickel plating is carried out. The preparation method of the chemical plating phosphating solution is carried out strictly according to the preparation principle of the chemical plating solution, and the addition of the plating solution is carried out every 0.5 to 1 hour.

[0030] Concrete implementation process formula of the present invention is:

[0031] Nickel Sulfate (NiSO 4 ·6H 2 O) 25g / L

[0032] Sodium hypophosphite (NaH 2 PO 2 ·H 2 O) 30g / L

[0033] Main complexing agent lactic acid 19g / L

[0034] Auxiliary complexing agent citric acid 6g / L

[0035] Auxiliary complexing agent EDTA disodium 7.5g / L

[0036] Auxiliary c...

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Abstract

The invention relates to a chemical plating solution for high-phosphor chemo-plating Ni-P alloy on the surface of stainless steel 304, belonging to the technical field of process formula of plating solution for chemo-nickeling stainless steel surface, comprising the following materials of: nickel sulfate 25-30g / l, sodium hypophosphite 25-30g / l, lactic acid 15-30g / l, citric acid 4-10g / l, disodium EDTA 4-15g / l, glycin 5-15g / l, hydro-acetic acid 5-18g / l, stabilizing agent KIO3 0.01-0.04g / l, sodium acetate 10-20g / l, and succinic acid 12-20g / l. And the high phosphor coating plated by the chemo-plating solution has excellent acid, alkali and salt corrosion resistance, and especially Cl- corrosion resistance better than the main body of stainless steel 304; in the mechanical performance aspect, improves Cl- corrosion resistance and wearability of stainless steel and has a hardness of 450-550Hv.

Description

(1) Technical field [0001] The invention relates to an electroless plating solution for high-phosphorus electroless Ni-P alloy plating on the surface of 304 stainless steel, and belongs to the technical field of plating solution formula for electroless nickel plating on the surface of stainless steel. (2) Background technology [0002] Stainless steel is widely used due to its excellent corrosion resistance. However, there are often some defects on the surface of stainless steel that destroy the uniformity of the passivation film, such as inclusions, poor road regions, grain boundaries, dislocations, etc. The passivation film in these places is relatively weak, and some active anions such as Cl - 、SCN - It is easy to enter the stainless steel surface from the defect and destroy its passivation film, especially the Cl - The destructive effect on the stainless steel passivation film is the most prominent, so that the corrosion resistance of stainless steel is greatly weakene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/36
Inventor 李永俊张新美牟淑荣张永军王素花
Owner CHINA NATIONAL HEAVY DUTY TRUCK GROUP
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