CN1900357B - Process for local chemical plating long pipe surface - Google Patents
Process for local chemical plating long pipe surface Download PDFInfo
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- CN1900357B CN1900357B CN200510085016A CN200510085016A CN1900357B CN 1900357 B CN1900357 B CN 1900357B CN 200510085016 A CN200510085016 A CN 200510085016A CN 200510085016 A CN200510085016 A CN 200510085016A CN 1900357 B CN1900357 B CN 1900357B
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Abstract
The present invention relates to a partial chemical plating long tube whole or partial surface method used for raising inner bore surface coating uniformity and workpiece service life. Said method includes 1, adopts plating solution trough having electroless plating liquid, plating solution drive unit, connecting chemical plating long tube to form loop through pipe and valve; 2, starting up plating solution drive unit to fill chemical plating liquid in long tube simultaneously adopting heater relatively moving outside long tube to heat chemical plating liquid in long tube, making chemical plating to long tube inner surface; 3, continue circulation using chemical plating liquid back flown to plating solution trough until long tube inner surface whole or partial chemical plating ending. Heater and workpiece relatively move at 0.1-500mm/ min speed; chemical plating liquid continuously pass through workpiece inner bore at 0-500mm/ s speed.
Description
Technical field
The present invention relates to a kind of method of local chemical plating long pipe surface, is a kind of all or part of method in inside and outside surface, hole of local chemical plating long pipe, belongs to electroless plating and anticorrosion technique field.
Background technology
Traditional chemical plating technology owing to be subjected to the restriction of dimension of tank, makes long tube can not carry out matting and electroless plating.Even dimension of tank is enough big, long tube is difficult to the circulation that interior plating bath is managed in assurance after reaching certain-length, influences the quality and the homogeneity of endoporus coating.
JP63195279 discloses a kind of first cleaning workpiece endoporus, feeds the method that chemical plating fluid carries out electroless plating again.The chemical plating fluid workpiece of flowing through is a direction all the time in this method.Owing to when chemical plating fluid is flowed through workpiece surface, electroless plating takes place constantly, be accompanied by a series of chemical reaction, cause it between inflow end and outflow end, to have concentration difference, thereby thickness of coating is inconsistent, influences quality of coating.
CN1033593C discloses a kind of method of chemical plating outside bath, can regularly, alternately change the flow through flow direction of workpiece of chemical plating fluid, has improved the composition profiles of plating bath in the workpiece endoporus, has obtained the uniform coating of thickness at Φ 25mm * 6.3m long tube endoporus.Because chemical plating fluid is in the concentration of inlet, along with its sedimentary generation, bath concentration changes, and can not guarantee the homogeneity of intermediary solution composition, thereby causes the in uneven thickness of coating.In addition, if need bigger coating bath heating installation for longer pipe, the component gradient of plating bath can not eliminate fully, will make that thickness of coating can not uniformity, thereby is restricted.
Summary of the invention
The method that the purpose of this invention is to provide a kind of local chemical plating long pipe surface, this method can make the thickness of coating uniformity of long pipe surface, are suitable for various long tubes, and employed Device-General degree height, cost are low, easily automated job.
For achieving the above object, the present invention is by the following technical solutions:
A kind of method of local chemical plating long pipe surface is characterized in that: this method comprises the steps:
(1), adopts bath trough that chemical plating fluid is housed, plating bath drive unit and the long tube of want electroless plating is connected and composed the loop by pipeline and valve;
(2), starting the plating bath drive unit injects the chemical plating fluid in the bath trough in the long tube, make chemical plating fluid by long tube and be filled in the long tube, simultaneously, adopt well heater chemical plating fluid flow direction in long tube outside and long tube to relatively move, to the chemical plating fluid local heating in the long tube, make the surface in the long tube carry out electroless plating;
(3), the chemical plating fluid that will be back to bath trough continues to recycle, till the surface in long tube all or local chemical plating finishes.
Well heater heats workpiece (long tube), just a certain section to long tube carries out local heating, that is, well heater heats the chemical plating fluid in this section of long tube, make the temperature of the chemical plating fluid in this section reach the temperature of electroless plating, thereby make the internal surface of this section carry out electroless plating.Because relatively moving of well heater and workpiece (long tube) can make all surperficial or part in the long tube carry out electroless plating.
In the method for local chemical plating long pipe surface of the present invention, in described step (2), the velocity of flow of chemical plating fluid in long tube is 0～500mm/s.
In the method for local chemical plating long pipe surface of the present invention, well heater can be following two kinds of move modes moving of long tube outside:
First kind of move mode is: in described step (2), well heater is that continous way moves the mobile of long tube outside, and the translational speed of well heater in the long tube outside is 0.1～500mm/min.
Second kind of move mode is: in described step (2), well heater is that stepped start-stop system moves the mobile of long tube outside, promptly with one section in the relative long tube of length of the well heater that adopted, another section of reheat long tube after a section of the heating long tube, one section connects one section stepped start-stop system and moves.
The type of heating of well heater is that the whole thermal source with well heater encases workpiece (long tube), promptly allows workpiece (long tube) be in the center of heater temperature field.
Thickness of coating is by the effective heated length (being generally the length of well heater) of the relative moving speed of well heater and workpiece (long tube), well heater and the decision that flow velocity is controlled of chemical plating fluid.Under the certain situation of thickness of coating and chemical plating fluid flow velocity, the speed of relative movement of well heater and workpiece (long tube) is relevant with effective heated length of well heater, and the effective heated length of well heater is long more, and then its relative moving speed is just fast more; Otherwise, then slow.
Loading capacity is the surface area dm of workpiece (long tube) at chemical plating fluid
2Ratio with chemical plating fluid volume L is called loading capacity or loading density, and loading capacity is more little, and ie in solution is many more, can provide enough metal ion depositions, so flow velocity can be very little.
The loading capacity of the effective heated length of the flow velocity of chemical plating fluid and workpiece (long tube) endoporus is inversely proportional to, and when loading capacity was very little, chemical plating fluid can provide enough metal ions, and the chemical plating fluid flow velocity can be very little, even is 0; Otherwise chemical plating fluid can not provide enough metal ions, and flow velocity will strengthen.In addition, bath flow rate can not be too fast, otherwise sedimentary coating particle can be washed away, and plating speed slows down even can not deposit to the workpiece bore surface.
By control heater and the relative moving speed of workpiece (long tube), the velocity of flow of chemical plating fluid, the thickness of coating of may command workpiece (long tube) internal surface, obtaining thickness is 1～100 μ m coating.Well heater and workpiece relative movement finish, and the workpiece endoporus is finished electroless plating.
In the method for local chemical plating long pipe surface of the present invention, in described step (2), it is 20～95 ℃ that the well heater that is adopted makes the temperature of the chemical plating fluid in the long tube.According to the chemical plating fluid of different chemical composition, take different temperature.
In the method for local chemical plating long pipe surface of the present invention, in described step (2), the well heater that is adopted is resistance wire heating unit, heating in water bath device, infrared heating device or steam heater.
In the method for local chemical plating long pipe surface of the present invention, in described step (1), the plating bath drive unit that is adopted is recycle pump or header tank and pump or pneumatic shuttle.
In the method for local chemical plating long pipe surface of the present invention, in described step (1), the material of the long tube that is adopted is aluminium, copper, nickel, iron and steel, aluminium alloy, copper alloy, nickelalloy.
In the method for local chemical plating long pipe surface of the present invention, in described step (1), the cross-sectional shape of the long tube that is adopted is for circular, square or special-shaped.
In the method for local chemical plating long pipe surface of the present invention, in described step (1), the cross-sectional shape of the long tube that is adopted is for circular, and the diameter of bore of long tube is 1～1000mm, and the length of long tube and the ratio of endoporus are 10: 1～10000: 1.
In the method for local chemical plating long pipe surface of the present invention, in described step (1), the cross-sectional shape of the long tube that is adopted is square, and the interior square hole length of side of long tube is 1～1000mm, and the ratio of the length of long tube and the interior square hole length of side is 10: 1～10000: 1.
In the method for local chemical plating long pipe surface of the present invention, in described step (1), the chemical plating fluid in the described bath trough is nickel, copper, tin or precious metal plating bath.
The method of local chemical plating long pipe surface of the present invention also goes for two-layer above composite deposite, that is, in described step (1), described bath trough is more than two, different chemical plating fluids is housed respectively, and described bath trough is in parallel with long tube by pipeline and valve respectively; The chemical plating fluid of each bath trough divides the electroless plating of successively carrying out each layer of step (2) and step (3) by the requirement of the composite plating bath layer of defined, till the composite deposite of making more than two-layer.After the electroless plating of each layer, all clean up with deionized water.
The method of local chemical plating long pipe surface of the present invention can also be applicable to the electroless plating of long tube surfaces externally and internally, that is:
A kind of method of local chemical plating long pipe surface, this method comprises the steps:
(1), the long tube outside of want electroless plating is surrounded by one deck outer tube, adopt bath trough that chemical plating fluid is housed, plating bath drive unit and constitute the loop, and the chuck between long tube, long tube and outer tube is connected in parallel in the described loop by pipeline and valve;
(2), starting the plating bath drive unit injects the chemical plating fluid in the bath trough in long tube and the chuck, make chemical plating fluid by long tube and chuck and be filled in long tube and chuck in, simultaneously, adopt well heater chemical plating fluid flow direction in outside pipe and long tube and chuck to relatively move, to the chemical plating fluid local heating in long tube and the chuck, make the inside and outside surface of long tube carry out electroless plating;
(3), the chemical plating fluid that will be back to bath trough continues to recycle, until the surface inside and outside the long tube all or till local chemical plating finishes.
Aforesaid method is a shared cover bath trough and the plating bath drive unit of the chuck between long tube and outer tube, can plate coating of the same race at the long tube surfaces externally and internally; Following method is that the chuck between long tube and outer tube adopts bath trough and plating bath drive unit separately, and two bath troughs are equipped with the different chemical plating bath, can be at long tube surfaces externally and internally plating coating not of the same race.The surfaces externally and internally of this long tube plating not method of coating of the same race is as follows:
A kind of method of local chemical plating long pipe surface is characterized in that: this method comprises the steps:
(1), the long tube outside with want electroless plating is surrounded by one deck outer tube, adopt and two to be set with the bath trough of different chemical plating bath and plating bath drive unit, and constitute two cover loops by pipeline and valve respectively, and the chuck between long tube, long tube and outer tube respectively is connected in parallel in the cover loop;
(2), starting the plating bath drive unit respectively injects the different chemical plating bath in the bath trough respectively in pairing long tube and the chuck, make the different chemical plating bath respectively by long tube and chuck and be filled in long tube and chuck in, simultaneously, adopt well heater chemical plating fluid flow direction in outside pipe and long tube and chuck to relatively move, to the chemical plating fluid local heating in long tube and the chuck, make the inside and outside surface of long tube carry out the electroless plating of different plating baths;
(3), the chemical plating fluid that will be back to bath trough continues to recycle, until the surface inside and outside the long tube all or till local chemical plating finishes.
Therefore, the method for local chemical plating long pipe surface of the present invention goes for the electroless plating on long tube inside and outside, inside and outside (interior serving can of the same race also can be not of the same race) surface.
Method of the present invention can be used for electroless plating, also can be used for matting, is about to chemical plating fluid and changes chemical cleaning solution into and get final product.
The present invention is all or part of method of a kind of local chemical plating long pipe surface, by the relative movement between well heater and the workpiece (long tube), eliminate the component gradient of chemical plating fluid, control coating deposition region, thereby coating uniformity in the assurance endoporus. this method can be suitable for preparing various conventional pipe or the special pipe that diameter is 1～1000mm, can be applicable to industries such as aerospace, oil, chemical industry, electric power, pharmacy, have the scope of application widely.
Method of the present invention is applicable to all tubuloses and similar piped device, as pipeline, tubular radiator etc.Be applicable to that all can carry out the material of electroless plating, as material and alloys thereof such as aluminium, copper, nickel, iron and steel.
Advantage of the present invention is to break through the method for traditional overall chemical plating, adopt the method for local chemical plating long pipe surface, temperature and flow velocity by the control chemical plating fluid, control the zone of the electroless plating on long tube endoporus (or outer or inside and outside) surface, can avoid the component gradient of chemical plating fluid in workpiece, make the thickness of coating uniformity of workpiece endoporus.In addition, the present invention is suitable for various long tubes, and the ratio of length and endoporus can be from 10: 1～10000: 1, even bigger.Its Device-General degree height, cost are low, easily automated job.
Embodiment 1
Use diameter to be blank, it is being carried out carry out chemical plating nickel-phosphorus alloy after oil removing, pickling, the secondary soaking zinc processing as the aluminum pipe of 3.0mm, long 3m.Carry out alkaline nickel preplating phosphorus earlier, carry out the acid chemical plating nickel-phosphorus alloy again.Adopt sophisticated chemical plating fluid prescription, technology as follows:
Alkali plating solution:
NiSO
4·6H
2O 30g/L
NaH
2PO
2·H
2O 10g/L
Trisodium Citrate 100g/L
Ammonium chloride 50g/L
PH value is 8.5～9.5, and temperature is 40～45 ℃, time 5min;
Acidic bath:
NiSO
4·6H
2O 25g/L
NaH
2PO
2·H
2O 24g/L
Lactic acid 25ml/L
Boric acid 20g/L
PH value is 4.5～5.0, and temperature is 80～95 ℃, and time 60min, bath flow rate are 5～10mm/s, and the relative moving speed of well heater and workpiece is 10～15mm/min.
Adopt two bath troughs that above-mentioned alkali plating solution, acidic bath are housed respectively, and rinse bath that deionized water is housed, by recycle pump, pipeline and valve respectively with aluminum pipe (workpiece) formation in parallel loop.Well heater adopts canular resistance wire heating unit, and this heating unit encases a section of aluminum pipe.
Carry out alkaline nickel preplating phosphorus earlier, open the outlet valve of alkali plating solution groove, start recycle pump, alkali plating solution in the alkali plating solution groove is injected in the aluminum pipe, make alkali plating solution by aluminum pipe and be filled in the pipe, simultaneously, adopt the resistance wire heating unit in the aluminum pipe outside,, relatively move to the other end from an end of aluminum pipe with alkali plating solution flow direction in the pipe, and to the heating of the alkali plating solution in managing, wherein, the alkali plating solution Heating temperature is 40～45 ℃, and the alkali plating solution flow velocity is 5～10mm/s, and the relative moving speed of well heater and aluminum pipe is 120～130mm/min.Alkali plating solution recycles, and till the surface in aluminum pipe all or local chemical plating finishes, closes recycle pump, and the outlet valve of alkali plating solution groove, and alkaline nickel preplating phosphorus finishes.
Then, use washed with de-ionized water.Open the outlet valve of ionized water rinse bath, start recycle pump, make ionized water pass through aluminum pipe, clean.After the cleaning, close recycle pump, and the outlet valve of ionized water rinse bath.
Carry out the acid chemical plating nickel-phosphorus alloy again, open the outlet valve of acidic bath groove, start recycle pump, acidic bath in the acidic bath groove is injected in the aluminum pipe, make acidic bath by aluminum pipe and be filled in the pipe, simultaneously, adopt the resistance wire heating unit in the aluminum pipe outside, from an end of aluminum pipe to the other end, relatively move with pipe inner acidic plating bath flow direction, and to the heating of the acidic bath in managing, wherein, the acidic bath Heating temperature is 80～95 ℃, the acidic bath flow velocity is 5～10mm/s, and the relative moving speed of well heater and aluminum pipe is that 10～15mm/min. acidic bath recycles, till all surperficial or local chemical plating in aluminum pipe finishes, close recycle pump, and the outlet valve of acidic bath groove, the acid chemical plating nickel-phosphorus alloy finishes.
The aluminum pipe of this long 3m is cut into 10 sections, and the thickness of this coating is 10 ± 1 μ m after measured, with the line cutting pipe is cut open again, finds that bore surface has layer of even coating.
Embodiment 2
With diameter is that the fine aluminium special pipe of 3.0mm, long 12m is that blank replaces the long aluminum pipe of 3m among the embodiment 1, and bath flow rate is 15～30mm/s, and all the other carry out according to the condition among the embodiment 1.The pipe that 12m is long is cut into 20 sections, and the thickness of this coating is 15 ± 1 μ m after measured, and bore surface has layer of even coating.
Embodiment 3
With diameter is that the fine aluminium special pipe of 5.0mm, long 1m is that blank replaces the long aluminum pipe of 3m among the embodiment 1, and bath flow rate is 500mm/s, and all the other carry out according to the condition among the embodiment 1.The pipe that 1m is long is cut into 4 sections, and the thickness of this coating is 3 ± 0.5 μ m after measured, and bore surface has layer of even coating.
Embodiment 4
With diameter is that the pure aluminum tube of 200.0mm, long 2.2m is that blank replaces the long aluminum pipe of 3m among the embodiment 1, and after plating bath was full of in the pure aluminum tube, flow velocity was 0mm/s, and all the other carry out according to the condition among the embodiment 1.The pipe that 2.2m is long is cut into 5 sections, and the thickness of this coating is 6 ± 1 μ m after measured, and bore surface has layer of even coating.
Embodiment 5
With diameter is 2.0mm, and the 1Cr18Ni9Ti stainless steel tube of long 5m at first carries out alkali cleaning, pickling, activation, chemical nickel plating then to the stainless steel tube endoporus.Its chemical nickel-plating liquid is as follows:
NiSO
4·6H
2O 22g/L
NaH
2PO
2·H
2O 14g/L
CH
3COONa·3H
2O 10g/L
CH
3COOH 7g/L
Thiocarbamide 0.002g/L
PH value is 4.0～5.0, and temperature is 80～95 ℃, and time 60min, bath flow rate are 15～30mm/s, adopts stepped start-stop system to move, and every electroless plating time is 60min.
Its detailed process is as follows:
The bath trough of above-mentioned chemical nickel-plating liquid is equipped with in employing, connects and composes the loop with 1Cr18Ni9Ti stainless steel tube (workpiece) respectively by recycle pump, pipeline and valve.Well heater adopts canular resistance wire heating unit, and this canular resistance wire heating unit encases a section of this stainless steel tube.
Open the outlet valve of bath trough, start recycle pump, chemical nickel-plating liquid in the bath trough is injected in the stainless steel tube, make chemical nickel-plating liquid by stainless steel tube and be filled in the pipe, simultaneously, adopt the resistance wire heating unit in the stainless steel tube outside, from an end of stainless steel tube to the other end, relatively move with chemical nickel-plating liquid flow direction in the pipe, and well heater takes stepped start-stop system to move to stainless steel tube, promptly, next section of reheat stainless steel tube after one section of the heating stainless steel tube, one section connects one section stepped start-stop system and moves. and wherein, the chemical nickel-plating liquid Heating temperature is 80～95 ℃, and the chemical nickel plating flow velocity is 15～30mm/s, the every electroless plating time (be well heater each section heat-up time) recycles for the 60min. chemical nickel-plating liquid, till all surperficial or local chemical plating in stainless steel tube finishes, close recycle pump, and the outlet valve of bath trough, chemical nickel plating finishes.
Stainless steel tube is cut into 10 sections, and the thickness of this coating is 12 ± 1 μ m after measured, and bore surface has layer of even coating.
Embodiment 6
With diameter is 3.0mm, and the endoporus nickel plating aluminum pipe of long 1.5m (coating 10 μ m) replaces the stainless steel tube among the embodiment 5, endoporus is cleaned, then electroless copper.Its chemical bronze plating liquid is as follows:
CuSO
4·5H
2O 10g/L
Formaldehyde (37%) 20ml/L
EDTA sodium salt 20g/L
NaOH 10g/L
Dimethyl dichlorosilane (DMCS) 0.25g/L
PH value is 11.5～12.5, and temperature is 55～65 ℃, and time 60min, bath flow rate are 15～30mm/s, adopts stepped start-stop system to move, and every electroless plating time is 60min.Except that above-mentioned processing condition, it handles detailed process with embodiment 5.
Aluminum pipe is cut into 5 sections, and the thickness of this composite deposite is 15 ± 1 μ m after measured, and bore surface has the layer of even copper coating.
Embodiment 7
With diameter is 3.0mm, and the endoporus nickel plating aluminum pipe of long 2m (coating 10 μ m) replaces the aluminum pipe among the embodiment 1, endoporus is cleaned, then Ni-P Ni-P/Al
2O
3Its chemical plating fluid is as follows:
NiSO
4·6H
2O 20g/L
NaH
2PO
2·H
2O 24g/L
Lactic acid 20ml/L
Propionic acid 5ml/L
KIO
3 2mg/L
Al
2O
3 6g/L
PH value is 4.5～5.0, and temperature is 80～85 ℃, time 60min, and bath flow rate and well heater translational speed are with the acidic bath among the embodiment 1.
Its detailed process is as follows:
Above-mentioned Ni-P Ni-P/Al is equipped with in employing
2O
3The bath trough of liquid connects and composes the loop with nickel plating aluminum pipe (workpiece) respectively by recycle pump, pipeline and valve.Well heater adopts canular resistance wire heating unit, and this canular resistance wire heating unit encases a section of this nickel plating aluminum pipe.
Open the outlet valve of bath trough, start recycle pump, chemical plating fluid in the bath trough is injected in the nickel plating aluminum pipe, make chemical nickel-plating liquid by the nickel plating aluminum pipe and be filled in the pipe, simultaneously, adopt the resistance wire heating unit in nickel plating aluminum pipe outside, from an end of nickel plating aluminum pipe to the other end, relatively move with chemical plating fluid flow direction in the pipe, and to the heating of the chemical plating fluid in managing, wherein, the chemical plating fluid Heating temperature is 80～85 ℃, the chemical plating fluid flow velocity is 5～10mm/s, and the relative moving speed of well heater and nickel plating aluminum pipe is 10～15mm/min.Plating bath recycles, and till the surface in the nickel plating aluminum pipe all or local chemical plating finishes, closes recycle pump, and the outlet valve of electroless plating liquid bath, finishes.
Aluminum pipe is cut into 5 sections, and the thickness of this composite deposite is 20 ± 1 μ m after measured, contains Al through energy spectrum analysis coating
2O
3
Claims (11)
1. the method for a local chemical plating long pipe surface, it is characterized in that: this method comprises the steps:
(1), adopts bath trough that chemical plating fluid is housed, plating bath drive unit and the long tube of want electroless plating is connected and composed the loop by pipeline and valve;
(2), starting the plating bath drive unit injects the chemical plating fluid in the bath trough in the long tube, make chemical plating fluid by long tube and be filled in the long tube, simultaneously, adopt well heater chemical plating fluid flow direction in long tube outside and long tube to relatively move, to the chemical plating fluid local heating in the long tube, make the surface in the long tube carry out electroless plating, the velocity of flow of chemical plating fluid in long tube is 0～500mm/s, well heater is that continous way moves the mobile of long tube outside, the translational speed of well heater in the long tube outside is 0.1～500mm/min, perhaps well heater is that stepped start-stop system moves the mobile of long tube outside, promptly with one section in the relative long tube of length of the well heater that adopted, another section of reheat long tube after one section of the heating long tube, one section connects one section stepped start-stop system and moves, and it is 20～95 ℃ that the well heater that is adopted makes the temperature of the chemical plating fluid in the long tube;
(3), the chemical plating fluid that will be back to bath trough continues to recycle, till the surface in long tube all or local chemical plating finishes.
2. the method for local chemical plating long pipe surface according to claim 1, it is characterized in that: in described step (2), the well heater that is adopted is resistance wire heating unit, heating in water bath device, infrared heating device or steam heater.
3. the method for local chemical plating long pipe surface according to claim 1, it is characterized in that: in described step (1), the plating bath drive unit that is adopted is recycle pump or header tank and pump or pneumatic shuttle.
4. the method for local chemical plating long pipe surface according to claim 1, it is characterized in that: in described step (1), the material of the long tube that is adopted is aluminium, copper, nickel, iron and steel, aluminium alloy, copper alloy, nickelalloy.
5. the method for local chemical plating long pipe surface according to claim 1 is characterized in that: in described step (1), the cross-sectional shape of the long tube that is adopted is for circular, square or special-shaped.
6. the method for local chemical plating long pipe surface according to claim 5, it is characterized in that: in described step (1), the cross-sectional shape of the long tube that is adopted is for circular, and the diameter of bore of long tube is 1～1000mm, and the length of long tube and the ratio of endoporus are 10: 1～10000: 1.
7. the method for local chemical plating long pipe surface according to claim 5, it is characterized in that: in described step (1), the cross-sectional shape of the long tube that is adopted is square, and the interior square hole length of side of long tube is 1～1000mm, and the ratio of the length of long tube and the interior square hole length of side is 10: 1～10000: 1.
8. the method for local chemical plating long pipe surface according to claim 1, it is characterized in that: in described step (1), the chemical plating fluid in the described bath trough is nickel, copper, tin or precious metal plating bath.
9. the method for local chemical plating long pipe surface according to claim 1, it is characterized in that: in described step (1), described bath trough is more than two, and different chemical plating fluids is housed respectively, and described bath trough is in parallel with long tube by pipeline and valve respectively; The chemical plating fluid of each bath trough divides the electroless plating of successively carrying out each layer of step (2) and step (3) by the requirement of the composite plating bath layer of defined, till the composite deposite of making more than two-layer.
10. the method for a local chemical plating long pipe surface, it is characterized in that: this method comprises the steps:
(1), the long tube outside of want electroless plating is surrounded by one deck outer tube, adopt bath trough that chemical plating fluid is housed, plating bath drive unit and constitute the loop, and the chuck between long tube, long tube and outer tube is connected in parallel in the described loop by pipeline and valve;
(2), starting the plating bath drive unit injects the chemical plating fluid in the bath trough in long tube and the chuck, make chemical plating fluid by long tube and chuck and be filled in long tube and chuck in, simultaneously, adopt well heater chemical plating fluid flow direction in outside pipe and long tube and chuck to relatively move, to the chemical plating fluid local heating in long tube and the chuck, make the inside and outside surface of long tube carry out electroless plating, the velocity of flow of chemical plating fluid in long tube is 0～500mm/s, well heater is that continous way moves the mobile of long tube outside, the translational speed of well heater in the long tube outside is 0.1～500mm/min, perhaps well heater is that stepped start-stop system moves the mobile of long tube outside, promptly with one section in the relative long tube of length of the well heater that adopted, another section of reheat long tube after one section of the heating long tube, one section connects one section stepped start-stop system and moves, and it is 20～95 ℃ that the well heater that is adopted makes the temperature of the chemical plating fluid in the long tube;
(3), the chemical plating fluid that will be back to bath trough continues to recycle, until the surface inside and outside the long tube all or till local chemical plating finishes.
11. the method for a local chemical plating long pipe surface is characterized in that: this method comprises the steps:
(1), the long tube outside with want electroless plating is surrounded by one deck outer tube, adopt and two to be set with the bath trough of different chemical plating bath and plating bath drive unit, and constitute two cover loops by pipeline and valve respectively, and the chuck between long tube, long tube and outer tube respectively is connected in parallel in the cover loop;
(2), starting the plating bath drive unit respectively injects the different chemical plating bath in the bath trough respectively in pairing long tube and the chuck, make the different chemical plating bath respectively by long tube and chuck and be filled in long tube and chuck in, simultaneously, adopt well heater chemical plating fluid flow direction in outside pipe and long tube and chuck to relatively move, to the chemical plating fluid local heating in long tube and the chuck, make the inside and outside surface of long tube carry out the electroless plating of different plating baths, the velocity of flow of chemical plating fluid in long tube is 0～500mm/s, well heater is that continous way moves the mobile of long tube outside, the translational speed of well heater in the long tube outside is 0.1～500mm/min, perhaps well heater is that stepped start-stop system moves the mobile of long tube outside, promptly with one section in the relative long tube of length of the well heater that adopted, another section of reheat long tube after one section of the heating long tube, one section connects one section stepped start-stop system and moves, and it is 20～95 ℃ that the well heater that is adopted makes the temperature of the chemical plating fluid in the long tube;
(3), the chemical plating fluid that will be back to bath trough continues to recycle, until the surface inside and outside the long tube all or till local chemical plating finishes.
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| CN200510085016A CN1900357B (en) | 2005-07-19 | 2005-07-19 | Process for local chemical plating long pipe surface |
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|---|---|---|---|---|
| US8387555B2 (en) | 2009-06-26 | 2013-03-05 | Glenn H. Wang | Apparatus and method for electroless nickel coating of tubular structures |
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