CN103233234A - Partial copper plating method for part - Google Patents
Partial copper plating method for part Download PDFInfo
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- CN103233234A CN103233234A CN2013101453790A CN201310145379A CN103233234A CN 103233234 A CN103233234 A CN 103233234A CN 2013101453790 A CN2013101453790 A CN 2013101453790A CN 201310145379 A CN201310145379 A CN 201310145379A CN 103233234 A CN103233234 A CN 103233234A
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Abstract
The invention belongs to electroplating technology and relates to the improvement of a partial copper plating method for a part. The method is characterized in that the copper electroplating protection comprises the following steps: carrying out pre-plating treatment; electroplating copper on the whole part; protecting the partially copper-plated region; removing the copper; and removing a polytetrafluoroethylene tape. The method provided by the invention has the following advantages: firstly, the phenomenon that partial nitridation/cyanide infiltration treated area is plated with copper is prevented, and simultaneously, a protective substance can be conveniently cleaned off so as to protect the local nitridation/cyanide infiltration treatment effect; and secondly, process flow is simplified, and two times of pre-plating treatment are regulated to one time of pre-plating treatment.
Description
Technical field
The invention belongs to electroplating technology, relate to the improvement to the parts locally copper electroplating method.
Background technology
In the manufacturing processed of some part, need parts locally nitriding/ooze cyanogen to handle to improve this regional hardness and wear resistance.For preventing non-nitriding/ooze cyanogen zone in nitriding/ooze the change of physicals in the cyanogen process, (thickness of coating 〉=50um) is as anti-nitriding/ooze cyanogen protective layer to adopt copper plate.In local copper facing process; need in copper plating solution, soak for a long time; soak time 3h～4h; in order to prevent selective nitriding/ooze cyanogen treatment zone plated with copper layer; need to adopt plumbous adhesive tape bonding or adopt the method protection selective nitriding that applies milling protection glue/ooze the cyanogen treatment zone, carry out copper facing then.Its shortcoming is: the first, protection weak effect.If adopt plumbous adhesive tape bonding method protection selective nitriding/ooze cyanogen treatment zone; the poor sealing performance of plumbous adhesive tape, in long-time electroplating process, electroplate liquid infiltrates the protected area easily; cause selective nitriding/ooze cyanogen treatment zone plated with copper layer, influence nitriding/ooze cyanogen treatment effect.If adopt to apply the method protection selective nitriding of milling protection glue/ooze the cyanogen treatment zone, after plating, milling protection glue is difficult to remove, and has residually at selective nitriding/ooze cyanogen treatment zone, influences nitriding/ooze cyanogen treatment effect equally.The second, processing method is loaded down with trivial details.Need be before insulation dress be hung earlier part is carried out in Solvent degreasing, electrochemical deoiling, electrochemical degreasing, the burn into and etc. a series of plating pre-treatments, just can electroplate after need plating pre-treatment again behind the insulation dress extension.
Summary of the invention
The objective of the invention is: propose a kind ofly can prevent selective nitriding/ooze cyanogen treatment zone plated with copper layer, be convenient to remove the parts locally copper electroplating method of protection thing simultaneously, in order to guarantee selective nitriding/the ooze effect that cyanogen is handled.Two of purpose of the present invention is to simplify technical process.
Technical scheme of the present invention is: a kind of parts locally copper electroplating method, be used in nitriding or ooze the cyanogen process protecting non-nitriding or oozing the cyanogen position, and it is characterized in that the step of electro-coppering protection is as follows:
1, plating pre-treatment:
1.1, Solvent degreasing: adopt one of following method to carry out oil removing:
1.1.1, adopt the trichloroethylene steam oil removing, part is put into the trichloroethylene steam degreasing tank, the trichloroethylene steam temperature is 87 ℃～91 ℃, the oil removing time is 1min～5min;
1.1.2, adopt absorbent cotton to dip in to get acetone or butanone solvent wiper element surface, remove the greasy dirt of piece surface;
1.2, electrochemical deoiling: part is put into the degreasing tank that electrochemical deoiling liquid is housed soak 3min～20min, the prescription of electrochemical deoiling liquid is:
Sodium hydroxide: 60g/l～80g/l;
Yellow soda ash: 20g/l～40g/l;
Sodium phosphate: 20g/l～40g/l;
Water glass: 3g/l～10g/l;
Solute is deionized water;
The total alkalinity of degreasing fluid is equivalent to NaOH concentration 40g/l～60g/l;
The temperature of degreasing fluid: 70 ℃～90 ℃;
1.3, electrochemical degreasing: part is put into the degreasing tank that electrochemical degreasing liquid the is housed oil removing of switching on, negative electrode oil removing 3min～5min, anode oil removing 1min～5min, the prescription of electrochemical deoiling liquid is:
Sodium hydroxide: 30g/l～50g/l;
Yellow soda ash: 20g/l～30g/l;
Sodium phosphate: 20g/l～30g/l;
Water glass: 3g/l～5g/l;
The total alkalinity of electrochemical degreasing liquid is equivalent to NaOH concentration 40g/l～60g/l;
Solute is deionized water;
Plate material: mild steel plate or Nickeled Steel Plate;
Current density: 3A/dm
2～10A/dm
2
The temperature of electrochemical degreasing liquid: 60 ℃～80 ℃;
1.4, the corrosion:
1.4.1, deep-etching: part is put into the deep-etching groove that deep-etching liquid is housed carry out deep-etching, the prescription of deep-etching liquid is as follows: the volumetric concentration of hydrochloric acid is more than 50%, if the volume of fourth is 0.4% of hydrochloric acid volume; The temperature of deep-etching liquid: 10 ℃～40 ℃; The deep-etching time: be not more than 10min;
1.4.2, weak corrosion: part is put into the weak etching tank that weak corrosive fluid is housed carries out weak corrosion, weak corrosive fluid is that concentration is that sulfuric acid or the concentration of 100g/l～150g/l is the hydrochloric acid of 100g/l～150g/l, the temperature of weak corrosive fluid is 10 ℃～40 ℃, and weak etching time is 0.5min～2min;
1.5, the neutralization: part is put into the neutralizing well that neutralizer is housed neutralize, neutralizer is that concentration is the yellow soda ash of 30g/l～50g/l, and the temperature of neutralizer is 10 ℃～40 ℃, in and the time be 0.5min～1min;
2, the whole electro-coppering of part: will fasten part behind the extension and be placed in the copper plating solution and electroplate, plating solution formula is:
Cuprous cyanide: 35g/l～70g/l;
Sodium cyanide: 7g/l～15g/l;
Sodium hydroxide: 10g/l～15g/l;
Seignette salt: 30g/l～60g/l;
Yellow soda ash:＜60g/l;
Solute is deionized water;
Anode material: fine copper copper coin;
Temperature of electroplating solution: 40 ℃～60 ℃;
Current density: 1A/dm
2～4A/dm
2
Thickness of coating: 50 μ mm～80 μ mm;
3, local copper facing locality protection: local copper facing zone is non-nitriding or oozes the cyanogen zone, need protect, adopting the tetrafluoroethylene adhesive tape that local copper facing zone is covered pastes, when pasting the tetrafluoroethylene adhesive tape, should guarantee that no bubble retains in the adhesive tape, after the stickup tape edge is compressed, itself and piece surface are fitted tightly;
4, remove copper: part is put into the copper groove that goes that copper liquid is housed soak 1h～1.5h, go the prescription of copper liquid to be:
Chromic anhydride: 100g/l～150g/l;
Sulfuric acid: 20g/l～30g/l;
Solvent is deionized water;
Remove copper liquid temperature: 10 ℃～40 ℃;
5, remove the tetrafluoroethylene adhesive tape: the tetrafluoroethylene adhesive tape is peeled off from the local copper facing of piece surface zone.
Advantage of the present invention is: the first, can prevent selective nitriding/ooze cyanogen treatment zone plated with copper layer, be convenient to remove the protection thing simultaneously, thereby guarantee selective nitriding/the ooze effect that cyanogen is handled.The second, simplified technical process, original second time electroplating pretreatment procedure has been optimized for pretreatment procedure one time.Three, will electroplate the protection in preceding non-copper facing zone; be adjusted into the whole local anti-nitriding in back/the ooze protection in cyanogen copper facing zone of electroplating; protecting materials soaks 3h～4h before adjusting in copper electroplating solution; adjust the back protecting materials and only need in going copper solutions, to soak 1h～1.5h, reduce the soak time of protecting materials in solution.
Description of drawings
Fig. 1 be on the embodiment 1 stop collar to need local plated copper structure synoptic diagram, a among the figure, b, three zones of c be to need nitriding/ooze the zone that cyanogen is handled, remaining part is the zone that needs the copper facing protection.
Fig. 2 is that 2 times stop collar back-up rings of embodiment need local copper-plated design of part synoptic diagram, and the d among the figure, e, f, g, the several zones of h are to need nitriding/ooze the zone that cyanogen is handled, and rest part is the zone that needs the copper facing protection.
Fig. 3 is that 3 times stop collars of embodiment need local copper-plated design of part synoptic diagram, and the several zones of the i among the figure, j are to need nitriding/ooze the zone that cyanogen is handled, and rest part is the zone that needs the copper facing protection.
Embodiment
Below the present invention is described in further details.The present invention is a kind of parts locally copper electroplating method, is used in nitriding or oozes the cyanogen process protecting non-nitriding or oozing the cyanogen position, it is characterized in that the step of electro-coppering protection is as follows:
1, plating pre-treatment:
1.1, Solvent degreasing: adopt one of following method to carry out oil removing:
1.1.1, adopt the trichloroethylene steam oil removing, part is put into the trichloroethylene steam degreasing tank, trichloroethylene steam is except 87 ℃～91 ℃ of oil temperatures, oil removing time 1min～3min;
1.1.2, adopt absorbent cotton to dip in to get acetone or butanone solvent wiper element surface, remove the greasy dirt of piece surface;
1.2, electrochemical deoiling: part is put into the degreasing tank that electrochemical deoiling liquid is housed soak 3min～20min, the prescription of electrochemical deoiling liquid is:
Sodium hydroxide: 60g/l～80g/l;
Yellow soda ash: 20g/l～40g/l;
Sodium phosphate: 20g/l～40g/l;
Water glass: 3g/l～10g/l;
Solute is deionized water;
The total alkalinity of degreasing fluid is equivalent to NaOH concentration 40g/l～60g/l;
The temperature of degreasing fluid: 70 ℃～90 ℃;
1.3, electrochemical degreasing: part is put into the degreasing tank that electrochemical degreasing liquid the is housed oil removing of switching on, negative electrode oil removing 3min～5min, anode oil removing 1min～5min, the prescription of electrochemical deoiling liquid is:
Sodium hydroxide: 30g/l～50g/l;
Yellow soda ash: 20g/l～30g/l;
Sodium phosphate: 20g/l～30g/l;
Water glass: 3g/l～5g/l;
The total alkalinity of electrochemical degreasing liquid is equivalent to NaOH concentration 40g/l～60g/l;
Solute is deionized water;
Plate material: mild steel plate or Nickeled Steel Plate;
Current density: 3g/l～10g/l;
The temperature of electrochemical degreasing liquid: 60 ℃～80 ℃;
1.4, the corrosion:
1.4.1, deep-etching: part is put into the deep-etching groove that deep-etching liquid is housed carry out deep-etching, the prescription of deep-etching liquid is as follows: the volumetric concentration of hydrochloric acid is more than 50%, if the volume of fourth is 0.4% of hydrochloric acid volume; The temperature of deep-etching liquid: 10 ℃～40 ℃; The deep-etching time: be not more than 10min;
1.4.2, weak corrosion: part is put into the weak etching tank that weak corrosive fluid is housed carries out weak corrosion, weak corrosive fluid is that concentration is that sulfuric acid or the concentration of 100g/l～150g/l is the hydrochloric acid of 100g/l～150g/l, the temperature of weak corrosive fluid is 10 ℃～40 ℃, and weak etching time is 0.5min～2min;
1.5, the neutralization: part is put into the neutralizing well that neutralizer is housed neutralize, neutralizer is that concentration is the yellow soda ash of 30g/l～50g/l, and the temperature of neutralizer is 10 ℃～40 ℃, in and the time be 0.5min～1min;
2, the whole electro-coppering of part: will fasten part behind the extension and be placed in the copper plating solution and electroplate, plating solution formula is:
Cuprous cyanide: 35g/l～70g/l;
Sodium cyanide: 7g/l～15g/l;
Sodium hydroxide: 10g/l～15g/l;
Seignette salt: 30g/l～60g/l;
Yellow soda ash:＜60g/l;
Solute is deionized water;
Anode material: fine copper copper coin;
Temperature of electroplating solution: 40 ℃～60 ℃;
Current density: 1A/dm
2～4A/dm
2
Thickness of coating: 50 μ mm～80 μ mm;
3, local copper facing locality protection: local copper facing zone is non-nitriding or oozes the cyanogen zone, need protect, adopting the tetrafluoroethylene adhesive tape that local copper facing zone is covered pastes, when pasting the tetrafluoroethylene adhesive tape, should guarantee that no bubble retains in the adhesive tape, after the stickup tape edge is compressed, itself and piece surface are fitted tightly;
4, remove copper: part is put into the copper groove that goes that copper liquid is housed soak 1h～1.5h, go the prescription of copper liquid to be:
Chromic anhydride: 100g/l～150g/l;
Sulfuric acid: 20g/l～30g/l;
Solvent is deionized water;
Remove copper liquid temperature: 10 ℃～40 ℃;
5, remove the tetrafluoroethylene adhesive tape: the tetrafluoroethylene adhesive tape is peeled off from the local copper facing of piece surface zone.
Embodiment 1: stop collar needs local copper facing on certain type machine, and referring to a among Fig. 1, b, three zones of c, they are to need nitriding/ooze the zone that cyanogen is handled, and remaining part is the zone that needs the copper facing protection.
1, plating pre-treatment:
1.1, Solvent degreasing:
Adopt the trichloroethylene steam oil removing, part is put into the trichloroethylene steam degreasing tank, the trichloroethylene steam temperature is 90 ℃, and the oil removing time is 3min;
1.2, electrochemical deoiling: part is put into the degreasing tank that electrochemical deoiling liquid is housed soak 4min, the prescription of electrochemical deoiling liquid is:
Sodium hydroxide: 65.4g/l;
Yellow soda ash: 32.2g/l;
Sodium phosphate: 29.5g/l;
Water glass: 5.6g/l;
Solute is deionized water;
The total alkalinity of degreasing fluid is equivalent to NaOH concentration 45.2g/l;
The temperature of degreasing fluid: 80 ℃;
1.3, electrochemical degreasing: part is put into the degreasing tank that electrochemical degreasing liquid the is housed oil removing of switching on, negative electrode oil removing 4min, anode oil removing 3min, the prescription of electrochemical deoiling liquid is:
Sodium hydroxide: 35.4g/l;
Yellow soda ash: 22.8g/l;
Sodium phosphate: 23.5g/l;
Water glass: 3.9g/l;
The total alkalinity of electrochemical degreasing liquid is equivalent to NaOH concentration 43.8g/l;
Solute is deionized water;
Plate material: mild steel plate;
Current density: 9A;
The temperature of electrochemical degreasing liquid: 70 ℃;
1.4, the corrosion:
1.4.1, deep-etching: part is put into the deep-etching groove that deep-etching liquid is housed carry out deep-etching, the prescription of deep-etching liquid is as follows: the volumetric concentration of hydrochloric acid is more than 59%, if the volume of fourth is 0.4% of hydrochloric acid volume; The temperature of deep-etching liquid: 13 ℃; The deep-etching time: 3min;
1.4.2, weak corrosion: part is put into the weak etching tank that weak corrosive fluid is housed carry out weak corrosion, weak corrosive fluid is that concentration is the hydrochloric acid of 125g/l, and the temperature of weak corrosive fluid is 13 ℃, and weak etching time is 1min;
1.5, the neutralization: part is put into the neutralizing well that neutralizer is housed neutralize, neutralizer is that concentration is the yellow soda ash of 42.6g/l, and the temperature of neutralizer is 12 ℃, in and the time be 0.6min;
2, the whole electro-coppering of part: will fasten part behind the extension and be placed in the copper plating solution and electroplate, plating solution formula is:
Cuprous cyanide: 38.5g/l;
Sodium cyanide: 10.2g/l;
Sodium hydroxide: 12.5g/l;
Seignette salt: 35.6g/l;
Yellow soda ash: 20.4g/l;
Solute is deionized water;
Anode material: fine copper copper coin;
Temperature of electroplating solution: 46 ℃;
Electric current: 9A;
Thickness of coating: 62 μ mm;
3, local copper facing locality protection: local copper facing zone is non-nitriding or oozes the cyanogen zone, need protect, adopting the tetrafluoroethylene adhesive tape that local copper facing zone is covered pastes, when pasting the tetrafluoroethylene adhesive tape, should guarantee that no bubble retains in the adhesive tape, after the stickup tape edge is compressed, itself and piece surface are fitted tightly;
4, remove copper: part is put into the copper groove that goes that copper liquid is housed soak 1.2h, go the prescription of copper liquid to be:
Chromic anhydride: 122g/l;
Sulfuric acid: 23.5g/l;
Solvent is deionized water;
Remove copper liquid temperature: 13 ℃;
5, remove the tetrafluoroethylene adhesive tape: the tetrafluoroethylene adhesive tape is peeled off from the local copper facing of piece surface zone.
Embodiment 2: the stop collar back-up ring needs local copper facing under certain type machine, and five zones of d, e, f, g, h among ginseng Fig. 2 are to need nitriding/ooze the zone that cyanogen is handled, and remaining part is the zone that needs the copper facing protection.
1, plating pre-treatment:
1.1, Solvent degreasing:
Adopt absorbent cotton to dip in and get acetone or butanone solvent wiper element surface, remove the greasy dirt of piece surface;
1.2, electrochemical deoiling: part is put into the degreasing tank that electrochemical deoiling liquid is housed soak 3min, the prescription of electrochemical deoiling liquid is:
Sodium hydroxide: 66.2g/l;
Yellow soda ash: 35.4g/l;
Sodium phosphate: 30.2g/l;
Water glass: 5.7g/l;
Solute is deionized water;
The total alkalinity of degreasing fluid is equivalent to NaOH concentration 46.1g/l;
The temperature of degreasing fluid: 74 ℃;
1.3, electrochemical degreasing: part is put into the degreasing tank that electrochemical degreasing liquid the is housed oil removing of switching on, negative electrode oil removing 4min, anode oil removing 1.5min, the prescription of electrochemical deoiling liquid is:
Sodium hydroxide: 38.2g/l;
Yellow soda ash: 25.4g/l;
Sodium phosphate: 26.3g/l;
Water glass: 3.6g/l;
The total alkalinity of electrochemical degreasing liquid is equivalent to NaOH concentration 46.6g/l;
Solute is deionized water;
Plate material: mild steel plate;
Electric current: 16A;
The temperature of electrochemical degreasing liquid: 72 ℃;
1.4, the corrosion:
1.4.1, deep-etching: part is put into the deep-etching groove that deep-etching liquid is housed carry out deep-etching, the prescription of deep-etching liquid is as follows: the volumetric concentration of hydrochloric acid is 62%, if the fourth volume is 0.4% of hydrochloric acid volume; The temperature of deep-etching liquid: 12 ℃; The deep-etching time: 3min;
1.4.2, weak corrosion: part is put into the weak etching tank that weak corrosive fluid is housed carry out weak corrosion, weak corrosive fluid is that concentration is the hydrochloric acid of 125g/l, and the temperature of weak corrosive fluid is 14 ℃, and weak etching time is 1min;
1.5, the neutralization: part is put into the neutralizing well that neutralizer is housed neutralize, neutralizer is that concentration is the yellow soda ash of 38.6g/l, and the temperature of neutralizer is 12 ℃, in and the time be 0.8min;
2, the whole electro-coppering of part: will fasten part behind the extension and be placed in the copper plating solution and electroplate, plating solution formula is:
Cuprous cyanide: 55.2g/l;
Sodium cyanide: 12.2g/l;
Sodium hydroxide: 11.8g/l;
Seignette salt: 40.5g/l;
Yellow soda ash: 21.2g/l;
Solute is deionized water;
Anode material: fine copper copper coin;
Temperature of electroplating solution: 54 ℃;
Current density: 12A;
Thickness of coating: 58 μ mm;
3, local copper facing locality protection: local copper facing zone is non-nitriding or oozes the cyanogen zone, need protect, adopting the tetrafluoroethylene adhesive tape that local copper facing zone is covered pastes, when pasting the tetrafluoroethylene adhesive tape, should guarantee that no bubble retains in the adhesive tape, after the stickup tape edge is compressed, itself and piece surface are fitted tightly;
4, remove copper: part is put into the copper groove that goes that copper liquid is housed soak 1.2h, go the prescription of copper liquid to be:
Chromic anhydride: 132g/l;
Sulfuric acid: 24.5g/l;
Solvent is deionized water;
Remove copper liquid temperature: 13 ℃;
5, remove the tetrafluoroethylene adhesive tape: the tetrafluoroethylene adhesive tape is peeled off from the local copper facing of piece surface zone.
Embodiment 3: stop collar needs local copper facing under certain type machine, is to need nitriding/ooze the zone that cyanogen is handled referring to two zones of the i among Fig. 3, j, and remaining part is the zone that needs the copper facing protection.
1, plating pre-treatment:
1.1, Solvent degreasing:
Adopt the trichloroethylene steam oil removing, part is put into the trichloroethylene steam degreasing tank, the trichloroethylene steam temperature is 89 ℃, and the oil removing time is 3min;
1.2, electrochemical deoiling: part is put into the degreasing tank that electrochemical deoiling liquid is housed soak 4min, the prescription of electrochemical deoiling liquid is:
Sodium hydroxide: 64.4g/l;
Yellow soda ash: 32.2g/l;
Sodium phosphate: 27.5g/l;
Water glass: 6.4g/l;
Solute is deionized water;
The total alkalinity of degreasing fluid is equivalent to NaOH concentration 48.2g/l;
The temperature of degreasing fluid: 74 ℃;
1.3, electrochemical degreasing: part is put into the degreasing tank that electrochemical degreasing liquid the is housed oil removing of switching on, negative electrode oil removing 4min, anode oil removing 1.5min, the prescription of electrochemical deoiling liquid is:
Sodium hydroxide: 33.4g/l;
Yellow soda ash: 24.8g/l;
Sodium phosphate: 23.5g/l;
Water glass: 4.1g/l;
The total alkalinity of electrochemical degreasing liquid is equivalent to NaOH concentration 45.8g/l;
Solute is deionized water;
Plate material: Nickeled Steel Plate;
Current density: 28A;
The temperature of electrochemical degreasing liquid: 69 ℃;
1.4, the corrosion:
1.4.1, deep-etching: part is put into the deep-etching groove that deep-etching liquid is housed carry out deep-etching, the prescription of deep-etching liquid is as follows: the volumetric concentration of hydrochloric acid is 60%, if the volume of fourth is 0.4% of hydrochloric acid volume; The temperature of deep-etching liquid: 12 ℃; The deep-etching time: 2min;
1.4.2, weak corrosion: part is put into the weak etching tank that weak corrosive fluid is housed carry out weak corrosion, weak corrosive fluid is that concentration is the hydrochloric acid of 128g/l, and the temperature of weak corrosive fluid is 14 ℃, and weak etching time is 1.5min;
1.5, the neutralization: part is put into the neutralizing well that neutralizer is housed neutralize, neutralizer is that concentration is the yellow soda ash of 41.2g/l, and the temperature of neutralizer is 12 ℃, in and the time be 0.8min;
2, the whole electro-coppering of part: will fasten part behind the extension and be placed in the copper plating solution and electroplate, plating solution formula is:
Cuprous cyanide: 42.6g/l;
Sodium cyanide: 12.1g/l;
Sodium hydroxide: 12.4g/l;
Seignette salt: 45.6g/l;
Yellow soda ash: 17.2g/l;
Solute is deionized water;
Anode material: fine copper copper coin;
Temperature of electroplating solution: 49 ℃;
Current density: 16.8A;
Thickness of coating: 68 μ mm;
3, local copper facing locality protection: local copper facing zone is non-nitriding or oozes the cyanogen zone, need protect, adopting the tetrafluoroethylene adhesive tape that local copper facing zone is covered pastes, when pasting the tetrafluoroethylene adhesive tape, should guarantee that no bubble retains in the adhesive tape, after the stickup tape edge is compressed, itself and piece surface are fitted tightly;
4, remove copper: part is put into the copper groove that goes that copper liquid is housed soak 1.3h, go the prescription of copper liquid to be:
Chromic anhydride: 131g/l;
Sulfuric acid: 25.5g/l;
Solvent is deionized water;
Remove copper liquid temperature: 12 ℃;
5, remove the tetrafluoroethylene adhesive tape: the tetrafluoroethylene adhesive tape is peeled off from the local copper facing of piece surface zone.
Claims (1)
1. a parts locally copper electroplating method is used in nitriding or oozes the cyanogen process protecting non-nitriding or oozing the cyanogen position, it is characterized in that the step of electro-coppering protection is as follows:
1.1, the plating pre-treatment:
1.1.1, Solvent degreasing: adopt one of following method to carry out oil removing:
1.1.1.1, adopt the trichloroethylene steam oil removing, part is put into the trichloroethylene steam degreasing tank, trichloroethylene steam is except 87 ℃～91 ℃ of oil temperatures, oil removing time 1min～3min;
1.1.1.2, adopt absorbent cotton to dip in to get acetone or butanone solvent wiper element surface, remove the greasy dirt of piece surface;
1.1.2, electrochemical deoiling: part is put into the degreasing tank that electrochemical deoiling liquid is housed soak 3min～20min, the prescription of electrochemical deoiling liquid is:
Sodium hydroxide: 60g/l～80g/l;
Yellow soda ash: 20g/l～40g/l;
Sodium phosphate: 20g/l～40g/l;
Water glass: 3g/l～10g/l;
Solute is deionized water;
The total alkalinity of degreasing fluid is equivalent to NaOH concentration 40g/l～60g/l;
The temperature of degreasing fluid: 70 ℃～90 ℃;
1.1.3, electrochemical degreasing: part is put into the degreasing tank that electrochemical degreasing liquid the is housed oil removing of switching on, negative electrode oil removing 3min～5min, anode oil removing 1min～5min, the prescription of electrochemical deoiling liquid is:
Sodium hydroxide: 30g/l～50g/l;
Yellow soda ash: 20g/l～30g/l;
Sodium phosphate: 20g/l～30g/l;
Water glass: 3g/l～5g/l;
The total alkalinity of electrochemical degreasing liquid is equivalent to NaOH concentration 40g/l～60g/l;
Solute is deionized water;
Plate material: mild steel plate or Nickeled Steel Plate;
Current density: 3A/dm
2～10A/dm
2
The temperature of electrochemical degreasing liquid: 60 ℃～80 ℃;
1.1.4, the corrosion:
1.1.4.1, deep-etching: part is put into the deep-etching groove that deep-etching liquid is housed carry out deep-etching, the prescription of deep-etching liquid is as follows: the volumetric concentration of hydrochloric acid is more than 50%, if the volume of fourth is 0.4% of hydrochloric acid volume; The temperature of deep-etching liquid: 10 ℃～40 ℃; The deep-etching time: be not more than 10min;
1.1.4.2, weak corrosion: part is put into the weak etching tank that weak corrosive fluid is housed carries out weak corrosion, weak corrosive fluid is that concentration is that sulfuric acid or the concentration of 100g/l～150g/l is the hydrochloric acid of 100g/l～150g/l, the temperature of weak corrosive fluid is 10 ℃～40 ℃, and weak etching time is 0.5min～2min;
1.1.5, the neutralization: part is put into the neutralizing well that neutralizer is housed neutralize, neutralizer is that concentration is the yellow soda ash of 30g/l～50g/l, and the temperature of neutralizer is 10 ℃～40 ℃, in and the time be 0.5min～1min;
1.2, the whole electro-coppering of part: will fasten part behind the extension and be placed in the copper plating solution and electroplate, plating solution formula is:
Cuprous cyanide: 35g/l～70g/l;
Sodium cyanide: 7g/l～15g/l;
Sodium hydroxide: 10g/l～15g/l;
Seignette salt: 30g/l～60g/l;
Yellow soda ash:＜60g/l;
Solute is deionized water;
Anode material: fine copper copper coin;
Temperature of electroplating solution: 40 ℃～60 ℃;
Current density: 1A/dm
2～4A/dm
2
Thickness of coating: 50 μ mm～80 μ mm;
1.3, local copper facing locality protection: local copper facing zone is non-nitriding or oozes the cyanogen zone, need protect, adopting the tetrafluoroethylene adhesive tape that local copper facing zone is covered pastes, when pasting the tetrafluoroethylene adhesive tape, should guarantee that no bubble retains in the adhesive tape, after the stickup tape edge is compressed, itself and piece surface are fitted tightly;
1.4, remove copper: part is put into the copper groove that goes that copper liquid is housed soaks 1h～1.5h, go the prescription of copper liquid to be:
Chromic anhydride: 100g/l～150g/l;
Sulfuric acid: 20g/l～30g/l;
Solvent is deionized water;
Remove copper liquid temperature: 10 ℃～40 ℃;
1.5, remove the tetrafluoroethylene adhesive tape: the tetrafluoroethylene adhesive tape is peeled off from the local copper facing of piece surface zone.
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| CN104005065A (en) * | 2014-06-11 | 2014-08-27 | 沈阳飞机工业（集团）有限公司 | Electrocoppering method for TC2 titanium alloy |
| CN104532316A (en) * | 2014-12-11 | 2015-04-22 | 贵州红林机械有限公司 | Anti-nitridation process for copper-tin composite plating |
| CN105177607A (en) * | 2015-07-21 | 2015-12-23 | 安徽江威精密制造有限公司 | Copper piece degreasing agent and preparation method thereof |
| CN105256350A (en) * | 2015-10-14 | 2016-01-20 | 哈尔滨飞机工业集团有限责任公司 | Electroplating pretreatment method for high alloy steel |
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| CN104005065A (en) * | 2014-06-11 | 2014-08-27 | 沈阳飞机工业（集团）有限公司 | Electrocoppering method for TC2 titanium alloy |
| CN104532316A (en) * | 2014-12-11 | 2015-04-22 | 贵州红林机械有限公司 | Anti-nitridation process for copper-tin composite plating |
| CN105177607A (en) * | 2015-07-21 | 2015-12-23 | 安徽江威精密制造有限公司 | Copper piece degreasing agent and preparation method thereof |
| CN105256350A (en) * | 2015-10-14 | 2016-01-20 | 哈尔滨飞机工业集团有限责任公司 | Electroplating pretreatment method for high alloy steel |
| CN105780028A (en) * | 2016-01-13 | 2016-07-20 | 哈尔滨飞机工业集团有限责任公司 | Method for removing flow marks and dark spots on surface of aluminum plate |
| CN105671606A (en) * | 2016-02-25 | 2016-06-15 | 哈尔滨飞机工业集团有限责任公司 | Insulation method for partial copper plating |
| CN107052712A (en) * | 2017-02-14 | 2017-08-18 | 哈尔滨东安发动机（集团）有限公司 | The processing method of high-precision stainless steel parts |
| CN108673064A (en) * | 2018-05-29 | 2018-10-19 | 宁波江丰电子材料股份有限公司 | The method of sputtering target material SB welding sandblasting rear protectings |
| CN109972179A (en) * | 2018-12-11 | 2019-07-05 | 中国航发贵州红林航空动力控制科技有限公司 | A kind of metal molybdenum chrome-faced process |
| CN109338421A (en) * | 2018-12-12 | 2019-02-15 | 中国航发贵州红林航空动力控制科技有限公司 | A kind of cyanide-free copper electroplating technique of high temperature resistant thermo-chemical treatment |
| CN109338421B (en) * | 2018-12-12 | 2020-12-18 | 中国航发贵州红林航空动力控制科技有限公司 | Cyanide-free copper plating process for high-temperature-resistant chemical heat treatment |
| CN111515637A (en) * | 2020-04-03 | 2020-08-11 | 中国航发哈尔滨东安发动机有限公司 | Processing method of slender shaft with internal spline |
| CN111515637B (en) * | 2020-04-03 | 2022-01-14 | 中国航发哈尔滨东安发动机有限公司 | Processing method of slender shaft with internal spline |
| CN114214682A (en) * | 2021-12-22 | 2022-03-22 | 东莞市金瑞五金股份有限公司 | Electroplating process for copper plating of workpiece and electroplating equipment thereof |
| CN115874137A (en) * | 2022-12-07 | 2023-03-31 | 中国航发长春控制科技有限公司 | Device and method for removing surface passive film by nitriding stainless steel material |
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