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Chemical plating liquid for preparing high temperature self lubricating composite coating and chemical plating method

A high-temperature self-lubricating, chemical plating solution technology, applied in liquid chemical plating, coating, metal material coating technology and other directions, can solve the problems of short service life and low operating temperature, and achieve good bonding force and extended working life. , composition and simple process effect

Inactive Publication Date: 2006-11-08
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, nickel phosphorus / calcium fluoride (Ni-P / CaF 2 ) Electroless plating solution preparation, the working environment temperature when the product is used is only suitable for about 600 ℃ or below, there are shortcomings such as short service life and low use temperature

Method used

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  • Chemical plating liquid for preparing high temperature self lubricating composite coating and chemical plating method

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Experimental program
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Effect test

Embodiment 1

[0031] A kind of chemical plating solution for preparing high-temperature self-lubricating composite coating, the composition and content of every 1 liter (L) chemical plating solution are:

[0032] Nickel Sulfate NiSO 4 ·7H 2 O 36g,

[0033] Potassium perrhenate KReO 4 2.2g

[0034] Sodium citrate Na 3 C 6 h 5 o 7 2H 2 O 20g

[0035] Lactic acid C 3 h 6 o 3 30g

[0036] Sodium Hypophosphite NaH 2 PO 4 30g

[0037] Barium fluoride BaF 2 25g

[0038] Calcium Fluoride (CaF) 2 25g

[0039] Lead nitrate Pb(NO 3 ) 2 10 mg.

[0040] The preparation method of above-mentioned electroless plating solution is:

[0041] 1. Weigh the metered nickel sulfate (NiSO 4 ·7H 2 O) or nickel chloride (NiCl 2 ·6H 2 O), ammonium perrhenate (NH 4 ReO 4 ) or potassium perrhenate (KReO 4 ), sodium citrate (Na 3 C 6 h 5 o 7 2H 2 ...

Embodiment 2

[0048] An electroless plating solution for preparing a high-temperature self-lubricating composite coating, the composition and content of every 1 liter (L) of the electroless plating solution are: nickel chloride (NiCl 2 ·6H 2 O) 15g, potassium perrhenate (KReO 4 ) 0.8g, sodium citrate (Na 3 C 6 h 5 o 7 2H 2 O) 10g, lactic acid (C 3 h 6 o 3 )20g, sodium hypophosphite NaH 2 PO 4 15g, barium fluoride (BaF 2 )5g, calcium fluoride (CaF 2 )5g, lead acetate (Pb(AC) 2 ) 2 mg, add water (preferably distilled water or deionized water) to 1 liter. The dipping pH value is 5, the temperature is 85°C, and the plating time is 10 to 60 minutes. Others are the same as in Example 1, omitted.

Embodiment 3

[0050] An electroless plating solution for preparing a high-temperature self-lubricating composite coating, the composition and content of every 1 liter (L) of the electroless plating solution are: nickel sulfate NiSO 4 ·7H 2 O 25g, ammonium perrhenate (NH 4 ReO 4 ) 1.5g, sodium citrate (Na 3 C 6 h 5 o 7 2H 2 O) 15g, lactic acid (C 3 h 6 o 3 )22g, sodium hypophosphite NaH 2 PO 4 22g, barium fluoride (BaF 2 ) 16g, calcium fluoride (CaF 2 ) 16g, lead nitrate (Pb(NO 3 ) 2 ) 5 mg, add water (preferably distilled water or deionized water) to 1 liter. The dipping pH value is 7, the temperature is 95°C, and the plating time is 10 to 60 minutes. Others are the same as in Example 1, omitted.

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Abstract

The chemical plating liquid for preparing high temperature self lubricating composite coating consists of nickel sulfate 15-36 g / L, ammonium perrhenate 0.8-2.2 g / L, sodium citrate 10-20 g / L, lactic acid 20-30 g / L, sodium hypophosphorate 15-30 g / L, barium fluoride 5-25 g / L, calcium fluoride 5-25 g / L and lead nitrate 2-10 mg / L. The chemical plating process includes cleaning and activating the surface of the workpiece, immersion plating the workpiece inside the chemical plating liquid of pH 5-7 at 85-95 for 10-60 min. The present invention can form composite Ni-Re-P / barium fluoride + calcium fluoride coating on the surface of mechanical parts to raise the surface friction reducing and wear resisting performance at very high temperature work condition and to increase the service life. The present invention is especially suitable for turbine blade, jet engine, etc.

Description

technical field [0001] The invention belongs to an electroless plating solution composition and an electroless plating method, in particular to an electroless plating solution and an electroless plating method for preparing a high-temperature self-lubricating composite coating. Background technique [0002] Because the coating prepared by electroless nickel plating has excellent characteristics such as wear resistance, corrosion resistance, uniform coating and good magnetic properties, it has long received great attention from the industry and has been widely used in machinery, electronics, instrumentation, light industry, transportation, etc. Widely used in transportation and other industries. In the prior art, nickel phosphorus / calcium fluoride (Ni-P / CaF 2 ) chemical plating solution preparation, the working environment temperature when the product is used is only suitable for about 600 ° C or below, and there are shortcomings such as short service life and low service te...

Claims

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Application Information

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IPC IPC(8): C23C18/16C23C18/18C23C18/31
Inventor 刘继光钟良张祖军
Owner SOUTHWEAT UNIV OF SCI & TECH
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