CN1699622A - Process for preparing self-lubricating chemical composite plating - Google Patents

Process for preparing self-lubricating chemical composite plating Download PDF

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Publication number
CN1699622A
CN1699622A CN 200510025066 CN200510025066A CN1699622A CN 1699622 A CN1699622 A CN 1699622A CN 200510025066 CN200510025066 CN 200510025066 CN 200510025066 A CN200510025066 A CN 200510025066A CN 1699622 A CN1699622 A CN 1699622A
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preparation
self
plating
composite plating
chemical composite
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CN 200510025066
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胡文彬
仵亚婷
刘磊
沈彬
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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Abstract

The present invention relates to a preparation method by self-lubrication composite electroless plating. It belongs to the field of electroless plating. The procedure is: 1) Fluorine carbon surfactant C20H20F23N2O4I which is commonly used for foam extinguisher is dissolved in PTFE latex emulsion to form mixture A, and SiC or Si3N4 or Al2O3 is dissolved in cetyl trimethyl ammonium bromide to form mixture B. 2) Preparation of plating solution, i.e. nickel sulfate, lactic acid, sodium acetate, sodium hypophosphite, propenysulfocarbamide are added in plating cell at room temperature, and pH is adjusted with sodium hydroxide. 3) Composite electroless plating: the mixture said A and said B are added in the plating solution prepared in step 2) and then heated. Consistent stirring is kept during plating and then self-lubrication composite electroless plating layer is obtained. The invention adopts different suitable surfactants depending on different grains to improve Zeta potential of the grain surfaces and suspensibility of the grains in plating solution through adsorption effect of different grains on different surfactants so as to further realize co-deposition of grains.

Description

The preparation method of self-lubricating chemical composite plating
Technical field
The present invention relates to a kind of preparation method's of chemical composite plating, particularly a kind of self-lubricating chemical composite plating preparation method, belong to the electroless plating technology field.
Background technology
For a long time, electroless plating and chemically composited coating technology have obtained application more and more widely because of easy and simple to handle, with low cost.(X is SiC, Al by Ni-P-X that above-mentioned technology obtained 2O 3, Si 3N 4Deng hard particles) composite deposite has good abrasion resistance; And Ni-P-X (X is tetrafluoroethylene, graphite, MoS 2Deng lubricated granules) composite deposite has good antifriction performance.This two classes composite deposite has been applied to relate to many industries of frictional wear operating mode.Yet along with the fast development of technology, people are more and more higher to the requirement of material, often have a very high frictional coefficient though above-mentioned first kind of material wear resistance is good, cause serious noise pollution and mechanical vibration loss; Second kind of material is because the existence of lubricated granules has very low frictional coefficient, particularly contain polytetrafluoroethylene (PTFE) particulate composite deposite, but carrying under low speed and the high year high speed abrasive conditions at height, this material has relatively poor wear resistance, make fret wear serious, can not satisfy some working conditions.For these reasons, people press for the NEW TYPE OF COMPOSITE coating of a kind of not only wear-resisting but also antifriction.At present, the self-lubricating chemical composite plating of having researched and developed has Ni-P-PTFE-SiC both at home and abroad, but because PTFE and two kinds of particulate physicalies of SiC such as density, difference such as adsorptivity are bigger, two kinds of particles are easy to generate interfacial effect each other in the codeposition process, it is also extremely inhomogeneous to make that the particle deposition distributes seldom simultaneously, thereby makes this composite deposite wear resistant friction reducing performance not reach requirement.
Find by prior art documents, Y.S.Huang, X.T.Zeng, I.Annergren et al. is (" top coat technology " 2003 in " exploitation of chemical Ni-P plating-PTFE-SiC composite deposite " literary composition, 167:207-211) only reported and impelled PTFE and SiC particle deposition with fluorocarbon surfactant, this method is handled the PTFE emulsion with fluorocarbon surfactant, PTFE particle surface current potential is obviously improved, and ceramic particle is relatively poor to the fluorocarbon surfactant adsorptivity, the ceramic grain surface current potential still remains on low-levelly as a result, and two kinds of obvious potential differences of particulate make particle ununiformity occur in deposition process.
Summary of the invention
The objective of the invention is at deficiency of the prior art, a kind of preparation method of self-lubricating chemical composite plating is proposed, make it adopt suitable tensio-active agent at different particles, by variable grain the adsorption of different surfaces promoting agent is improved the Zeta potential of particle surface and the suspension in plating bath, further realize the particulate codeposition.
The present invention is achieved by the following technical solutions, and method of the present invention comprises pretreatment of particles, preparation plating bath, Ni-P, and concrete steps are as follows:
1) at first will be used for the fluorocarbon surfactant C of fire foam 20H 20F 23N 2O 4Get mixed liquor A after I and the dissolving of PTFE emulsion, again with cetyl trimethylammonium bromide and SiC or Si 3N 4Or Al 20 3After dissolving respectively, ceramic particle gets mixed liquid B;
2) plating bath preparation: the electroless nickel alloy plating bath is selected acid chemical plating nickel solution for use, that is: at room temperature in coating bath, add single nickel salt 18～30g/L, lactic acid 15～35ml/L, sodium-acetate 10～20g/L, sodium hypophosphite 15～40g/L, propenyl thiocarbamide 0.1～0.3mg/L successively, adjust the pH value with sodium hydroxide;
3) Ni-P: adopt Technology of Chemical Composite Plating, promptly in the acidic bath of step 2 preparation, add mixed liquor A and B, the heating plating bath, the plating process needs constantly to stir, and obtains self-lubricating chemical composite plating.
Described fluorocarbon surfactant C 20H 20F 23N 2O 4I and PTFE emulsion, its mass ratio are 1: 30～1: 55.
Described cetyl trimethylammonium bromide, its concentration are 0.07～0.12g/L, and the best is 0.09g/L.
Described cetyl trimethylammonium bromide and SiC or Si 3N 4Or Al 2O 3Ceramic particle, its mass ratio are 1: 80～1: 100.
Described pH value is 4.6～5.0, and the best is 4.8.
Described interpolation mixed liquor A and B, the addition of mixed liquor A are 10～14g/L, and the addition of mixed liquid B is 6～15g/L.
Described heating, its temperature are 85～90 ℃.
The present invention is by the selection absorption of variable grain to the different surfaces promoting agent, changes the Zeta potential of particle surface.Particularly, positive particle fluorocarbon surfactant C 20H 20F 23N 2O 4I is adsorbed in the PTFE particle surface, and its surperficial current potential is increased, and has increased the electrostatic repulsion between the particle, the sedimentation of having avoided particle to cause because of action of gravity.In addition, the increase of particle surface current potential makes PTFE easier matrix surface that is adsorbed under the effect of electrostatic attraction, thereby increases the particulate deposition.Equally, the absorption of cetyl trimethylammonium bromide also increases SiC particle surface current potential, increases the electrostatic repulsion between the SiC particle, avoids particles settling, also makes SiC be adsorbed in matrix surface easily simultaneously, and its deposition is increased.In a word, the adding of tensio-active agent has reached and has increased the particle deposition amount and improve the effect that uniform particles distributes, and finally reaches the purpose of improving composite deposite wear resistant friction reducing performance.Certainly, the particulate compounding quantity is a purpose to improve coating performance, if add-on is too many, the stress of coating is increased, and bonding force descends.Granule content does not then reach the effect of improving coating performance very little.Repetition test draws, and PTFE emulsion addition is 10～14g/L, and the addition of ceramic particle is that 6～15g/L is proper.
Two kinds of particle deposition amounts of the self-lubricating chemical composite plating that the present invention obtained are many and be evenly distributed, and have good wear resistant friction reducing performance under height carries at a high speed.Method involved in the present invention is easy and simple to handle, and cost is low, has realized the uniform deposition of particle having obtained self-lubricating chemical composite plating by the effect of tensio-active agent, makes material possess range of application widely.
Embodiment
Embodiment 1
1, with 0.33g fluorocarbon surfactant C 20H 20F 23N 2O 4I with deionized water dissolving after and the 14gPTFE emulsion mix; With the 0.07g cetyl trimethylammonium bromide with deionized water dissolving after and 8gSiC mix.
2, chemical nickel-plating solution preparation: the chemical plating fluid composition comprises single nickel salt, sodium hypophosphite, lactic acid, sodium-acetate, propenyl thiocarbamide, at room temperature in coating bath, add single nickel salt 20g/L, lactic acid 33mL/L, sodium-acetate 15g/L, sodium hypophosphite 25g/L and propenyl thiocarbamide 1.5mg/L successively, adjust pH value to 4.6 with sodium hydroxide.
3, Ni-P: in the acidic bath of step 2 preparation, add two kinds of mixed solutions described in 1, heating plating bath to 90 ℃, the plating process constantly stirs, and obtains self-lubricating chemical composite plating.
The coating phosphorus content that present embodiment obtained is 8.7%wt, and PTFE content is 5.3%wt, and SiC content is 6%wt.Microhardness is HV under this coating plated state 50482, obviously improve than the microhardness of the chemical Ni-P plating that obtains under the same terms-PTFE composite deposite.Under the rotating speed of 150N high-load and 100r/min, the frictional coefficient of this composite deposite only is 0.15, and its volume wear rate is 8.77 * 10 -5Mm 3M -1, and same thickness, the chemical Ni-P plating under the identical abrasive conditions-PTFE composite deposite has ground, and substrate is destroyed.Make the wear resistance of Ni-P-PTFE-SiC composite deposite further improve at 400 ℃ of following thermal treatment 1hr.
Embodiment 2
1, with 0.18g fluorocarbon surfactant C 20H 20F 23N 2O 4I with deionized water dissolving after and the 10gPTFE emulsion mix; With the 0.07g cetyl trimethylammonium bromide with deionized water dissolving after and 10gAl 2O 3Ceramic particle mixes.
2, chemical nickel-plating solution preparation: its composition comprises single nickel salt, sodium hypophosphite, lactic acid, sodium-acetate, propenyl thiocarbamide, at room temperature in coating bath, add single nickel salt 20g/L, Trisodium Citrate 25g/L, sodium hypophosphite 30g/L and propenyl thiocarbamide 1.5mg/L successively, adjust pH value to 4.8 with sodium hydroxide.
3, Ni-P: in the acidic bath of step 2 preparation, add two kinds of mixed solutions described in 1, heating plating bath to 90 ℃, the plating process constantly stirs, and obtains self-lubricating chemical composite plating.
Phosphorus content is 9.0%wt in the present embodiment gained nano surface matrix material, and PTFE content is 4%wt, and the content of micrometer alumina is 5.2%wt.Under the rotating speed of 150N high-load and 100r/min, the frictional coefficient of this composite deposite only is 0.17, and its volume wear rate is 8.31 * 10 -5Mm 3M -1
Embodiment 3
1, with 0.27g fluorocarbon surfactant C 20H 20F 23N 2O 4I with deionized water dissolving after and the 12.5gPTFE emulsion mix; With the 0.09g cetyl trimethylammonium bromide with deionized water dissolving after and 9gSi 3N 4Mix.
2, chemical nickel-plating solution preparation: its composition comprises single nickel salt, sodium hypophosphite, lactic acid, sodium-acetate, propenyl thiocarbamide, at room temperature in coating bath, add single nickel salt 25g/L, lactic acid 33mL/L, sodium-acetate 15g/L, sodium hypophosphite 25g/L and propenyl thiocarbamide 1.5mg/L successively, adjust pH value to 5.0 with sodium hydroxide.
3, Ni-P: in the acidic bath of step 2 preparation, add two kinds of mixed solutions described in 1, heating plating bath to 90 ℃, the plating process constantly stirs, and obtains self-lubricating chemical composite plating.
Phosphorus content is 8.9%wt in the present embodiment gained surface self-lubricating composite material, and PTFE content is 4.2%wt, and the content of micron silicon nitride particle is 5.0%wt.Under the rotating speed of 150N high-load and 100r/min, with heat treatment state 45# carbon steel to when mill this composite deposite frictional coefficient only be 0.17, its volume wear rate is 8.5 * 10 -5Mm 3M -1

Claims (10)

1. the preparation method of a self-lubricating chemical composite plating is characterized in that, concrete steps are as follows:
1) at first will be used for the fluorocarbon surfactant C of fire foam 20H 20F 23N 2O 4Get mixed liquor A after I and the dissolving of PTFE emulsion, again with cetyl trimethylammonium bromide and SiC or Si 3N 4Or Al 2O 3After dissolving respectively, ceramic particle gets mixed liquid B;
2) plating bath preparation: the electroless nickel alloy plating bath is selected acid chemical plating nickel solution for use, at room temperature adds single nickel salt, lactic acid, sodium-acetate, sodium hypophosphite, propenyl thiocarbamide successively in coating bath that is:, adjusts the pH value with sodium hydroxide;
3) Ni-P: adopt Technology of Chemical Composite Plating, promptly in the acidic bath of step 2 preparation, add mixed liquor A and B, the heating plating bath, the plating process needs constantly to stir, and obtains self-lubricating chemical composite plating.
2. the preparation method of self-lubricating chemical composite plating according to claim 1 is characterized in that, described fluorocarbon surfactant C 20H 20F 23N 2O 4I and PTFE emulsion, its mass ratio are 1: 30～1: 55.
3. the preparation method of self-lubricating chemical composite plating according to claim 1 is characterized in that, described cetyl trimethylammonium bromide, and its concentration is 0.07～0.12g/L.
4. the preparation method of self-lubricating chemical composite plating according to claim 3 is characterized in that, described cetyl trimethylammonium bromide, and its concentration is further defined to 0.09g/L.
5. the preparation method of self-lubricating chemical composite plating according to claim 1 is characterized in that, described cetyl trimethylammonium bromide and SiC or Si 3N 4Or Al 2O 3Ceramic particle, its mass ratio are 1: 80～1: 100.
6. the preparation method of self-lubricating chemical composite plating according to claim 1, it is characterized in that described single nickel salt 18～30g/L, lactic acid 15～35ml/L, sodium-acetate 10～20g/L, sodium hypophosphite 15～40g/L, the propenyl thiocarbamide 0.1～0.3mg/L of at room temperature in coating bath, adding successively.
7. the preparation method of self-lubricating chemical composite plating according to claim 6 is characterized in that, described pH value is 4.6～5.0.
8. the preparation method of self-lubricating chemical composite plating according to claim 1 is characterized in that, described pH value is further defined to 4.8.
9. the preparation method of self-lubricating chemical composite plating according to claim 1 is characterized in that, described interpolation mixed liquor A and B, the addition of mixed liquor A are 10～14g/L, and the addition of mixed liquid B is 6～15g/L.
10. the preparation method of self-lubricating chemical composite plating according to claim 1 is characterized in that, described heating, and its temperature is 85～90 ℃.
CN 200510025066 2005-04-14 2005-04-14 Process for preparing self-lubricating chemical composite plating Pending CN1699622A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101831642A (en) * 2010-04-13 2010-09-15 长沙力元新材料有限责任公司 Application method of alkali electroless nickel/cobalt-plating solution
CN101831686A (en) * 2010-06-13 2010-09-15 上海交通大学 Method for preparing nickel-based paraffin self-lubricating composite plating layer
CN101845658A (en) * 2010-06-13 2010-09-29 上海交通大学 Method for preparing in-situ liquid self-lubricating metal-based composite material
CN103290397A (en) * 2013-06-08 2013-09-11 广州市特种承压设备检测研究院 Plating liquor of surface super-hydrophobic chemical clad layer of safety valve, preparation method and anti-corrosive safety valve
CN103526268A (en) * 2013-10-22 2014-01-22 河南理工大学 Preparation method of surface-superhydrophobic metal-base composite coating
CN115198513A (en) * 2022-07-28 2022-10-18 中国科学院兰州化学物理研究所 MXene @ SiC solvent-free nano fluid, preparation method and application thereof, composite lubricating material and preparation method
CN116179029A (en) * 2023-04-26 2023-05-30 上海涓微新材料科技有限公司 Wear-resistant corrosion-resistant nickel-phosphorus Teflon coating and preparation method thereof

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101831642A (en) * 2010-04-13 2010-09-15 长沙力元新材料有限责任公司 Application method of alkali electroless nickel/cobalt-plating solution
CN101831686A (en) * 2010-06-13 2010-09-15 上海交通大学 Method for preparing nickel-based paraffin self-lubricating composite plating layer
CN101845658A (en) * 2010-06-13 2010-09-29 上海交通大学 Method for preparing in-situ liquid self-lubricating metal-based composite material
CN101831686B (en) * 2010-06-13 2012-11-21 上海交通大学 Method for preparing nickel-based paraffin self-lubricating composite plating layer
CN103290397A (en) * 2013-06-08 2013-09-11 广州市特种承压设备检测研究院 Plating liquor of surface super-hydrophobic chemical clad layer of safety valve, preparation method and anti-corrosive safety valve
CN103290397B (en) * 2013-06-08 2016-08-10 广州市特种承压设备检测研究院 Plating solution, preparation method and the anti-corrosive safety valve of a kind of relief valve surface super hydrophobic chemical deposit
CN103526268A (en) * 2013-10-22 2014-01-22 河南理工大学 Preparation method of surface-superhydrophobic metal-base composite coating
CN103526268B (en) * 2013-10-22 2016-01-13 河南理工大学 A kind of preparation method of metal-based compound coating of surface super hydrophobic
CN115198513A (en) * 2022-07-28 2022-10-18 中国科学院兰州化学物理研究所 MXene @ SiC solvent-free nano fluid, preparation method and application thereof, composite lubricating material and preparation method
CN116179029A (en) * 2023-04-26 2023-05-30 上海涓微新材料科技有限公司 Wear-resistant corrosion-resistant nickel-phosphorus Teflon coating and preparation method thereof

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