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
CN101024879AInactive Publication Date: 2007-08-29CHINA NATIONAL HEAVY DUTY TRUCK GROUP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA NATIONAL HEAVY DUTY TRUCK GROUP
Publication Date
2007-08-29
Estimated Expiration
Not applicable · inactive patent

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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.
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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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