CN103628097B - In the method being coated with on the part containing nickel coating chromium plating - Google Patents
In the method being coated with on the part containing nickel coating chromium plating Download PDFInfo
- Publication number
- CN103628097B CN103628097B CN201310573185.0A CN201310573185A CN103628097B CN 103628097 B CN103628097 B CN 103628097B CN 201310573185 A CN201310573185 A CN 201310573185A CN 103628097 B CN103628097 B CN 103628097B
- Authority
- CN
- China
- Prior art keywords
- coated
- containing nickel
- nickel coating
- temperature
- electric current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
In the method being coated with on the part containing nickel coating chromium plating, processing step is as follows: (1), to be coated with the part containing nickel coating as anode, with iron plate as negative electrode, uses galvanoplastic oil removing；(2) by the part aqueous solution of nitric acid deoxygenation compound being coated with containing nickel coating after oil removing cleaning；(3) the part aqueous hydrochloric acid solution containing nickel coating that is coated with after deoxygenation compound cleaning is carried out weak corrosion；(4) the part aqueous sulfuric acid containing nickel coating that is coated with after weak corrosion cleaning is activated；(5) part containing nickel coating that is coated with after activation cleaning is put into the coating bath equipped with plating solution, to be coated with the part containing nickel coating as negative electrode, with lead-antimony alloy plate as anode, the temperature controlling described plating solution is 52～60 DEG C, the mode using ladder to increase electric current density carries out current activation, carry out chromium plating when electric current density increases to 40 ampere/square decimeter, the chromium plating time should make the described part layers of chrome thickness containing nickel coating overlying lid reach 9～12 μm.
Description
Technical field
The invention belongs to coating surface processing technology field, particularly to a kind of in the side being coated with on the part containing nickel coating chromium plating
Method.
Background technology
It is applied to the part of the special environments such as Aeronautics and Astronautics, owing to needing to use under the high temperature of about 400 DEG C and abrasion environment,
Need to be coated with on the part containing nickel coating chromium plating again, be coated with the heat-resisting, corrosion-resistant and wear-resisting etc. of nickeliferous coating component to improve
The performance of aspect.At part containing chromium plating on nickel coating, should consider the protection containing nickel coating, again consider chromium plating conform to
Ask, it is also contemplated that the impact on environment of the used chemical reagent, use chrome-plated process conventional in prior art to be difficult to ensure that product
The qualification rate of product.
Summary of the invention
It is an object of the invention to provide a kind of in the method being coated with on the part containing nickel coating chromium plating, use the method, can become
Merit ground realizes containing chromium plating on nickel coating, and makes not to be destroyed containing nickel coating, and the qualification rate of chrome-plated part is up to more than 90%.
Of the present invention in the method being coated with on the part containing nickel coating chromium plating, processing step is as follows:
(1) oil removing
To be coated with the part containing nickel coating as anode, with iron plate as negative electrode, they are immersed in temperature is in 60～80 DEG C of degreasing fluids,
Controlling galvanic electric current density at 3～7 amperes/square decimeter, the oil removing time is 5～10 minutes, after the oil removing time arrives,
Take out being coated with the part containing nickel coating from degreasing fluid, first clean with the water that temperature is 60～80 DEG C, then be room temperature by temperature
Water clean, to remove the degreasing fluid on described part；
Described degreasing fluid is formulated by sodium hydroxide, tertiary sodium phosphate, sodium carbonate and tap water, the concentration of sodium hydroxide be 25～
75g/L, the concentration of tertiary sodium phosphate is 10～30g/L, and the concentration of sodium carbonate is 30～100g/L；
(2) deoxygenation compound
The part containing nickel coating that is coated with after oil removing cleaning is put into immersion 10～15 in the aqueous solution of nitric acid that temperature is room temperature
Second take out, then clean, to remove the nitric acid on described part with water that temperature is room temperature；
In described aqueous solution of nitric acid, the percentage by volume of nitric acid is 40～50%；
(3) weak corrosion
The part containing nickel coating that is coated with after deoxygenation compound cleaning is put into immersion in the aqueous hydrochloric acid solution that temperature is room temperature
Within 0.5～2 minute, take out, then clean, to remove the hydrochloric acid on described part with the water that temperature is room temperature；
In described aqueous hydrochloric acid solution, the concentration of hydrochloric acid is 200～300g/L；
(4) activation
The part containing nickel coating that is coated with after weak corrosion cleaning is put into immersion 1～3 in the aqueous sulfuric acid that temperature is room temperature
Minute take out, then clean, to remove the sulphuric acid on described part with water that temperature is room temperature；
In described aqueous sulfuric acid, the concentration of sulphuric acid is 100～150g/L；
(5) current activation and chromium plating
The part containing nickel coating that is coated with after activation cleaning is put into the coating bath equipped with plating solution, to be coated with zero containing nickel coating
Part is negative electrode, and with lead-antimony alloy plate as anode, the temperature controlling described plating solution is 52～60 DEG C, when the temperature of described part reaches
During to the temperature of plating solution, connecting DC source, the mode using ladder to increase electric current density carries out current activation, works as electric current density
Increase to carry out chromium plating during 40 ampere/square decimeter, chrome-plating process control electric current density and is maintained at 40 amperes/square decimeter,
The chromium plating time should make the described part layers of chrome thickness containing nickel coating overlying lid reach 9～12 μm, and (being coated with the part containing nickel coating is
Described in embodiment during nozzle outer housing, the time reaching 9～12 μm at the layers of chrome thickness containing nickel coating overlying lid is 10～15 minutes)；
The preparation method of described plating solution is: chromic anhydride, sulphuric acid and tap water add coating bath the formation chromic anhydride that stirs-sulphuric acid mixing
Liquid, in described mixed liquor, the concentration of chromic anhydride is 200～250g/L, and the concentration of sulphuric acid is 2～2.5g/L；With lead-antimony alloy plate it is
They, with iron plate as negative electrode, are immersed in chromic anhydride-sulfuric acid mixture liquid that temperature is 52～60 DEG C, control galvanic electricity by anode
Current density is at 10～20 amperes/square decimeter, when in described mixed liquor, the concentration of trivalent chromic ion reaches 3～8g/L and i.e. forms plating
Liquid, after plating solution is formed, blocks DC source and takes out iron plate.
After chromium plating completes, plated part is taken out from coating bath and cleans the plating solution removed on plated part with the water that temperature is room temperature,
Then will clean after plated part put into dehydrogenation equipment (baking oven or stove) normal pressure, 180～200 DEG C carry out dehydrogenation,
The time of dehydrogenation is 3～4 hours.
In the step (5) of said method, ladder increases the operation of electric current density and is: with the speed of 0.5 ampere/square decimeter per second
Electric current density is increased to 15 amperes/square decimeter and keeps this electric current density 30 seconds, then with 0.5 ampere/square decimeter per second
Speed electric current density is increased to 30 amperes/square decimeter and keeps this electric current density 30 seconds, then with per secondAmpere/
Electric current density is increased to 40 amperes/square decimeter by the speed of square decimeter.
In said method, in described lead-antimony alloy plate, the mass fraction of lead is 94%, and the mass fraction of antimony is 6%.
In step (2) in said method, described nitric acid is chemical grade nitric acid；In step (3), described hydrochloric acid is technical grade
Hydrochloric acid；In step (4) and step (5), described sulphuric acid is chemical grade sulphuric acid.
In said method, described room temperature is indoor natural temperature.
The method have the advantages that
1, the invention provides and a kind of be coated with on the part containing nickel coating the new method of chromium plating, use the method chromium plating, nickeliferous
Coating is not destroyed, and binding force of cladding material is good, and the qualification rate of product is up to more than 90%.
2, the method for the invention is carried out before nickeliferous coating surface chromium plating aqueous solution of nitric acid deoxygenation compound, the weak corruption of aqueous hydrochloric acid solution
Erosion, aqueous sulfuric acid activation not only contribute to the activation removing and containing nickel coating completely of oxide layer, are favorably improved nickeliferous
The qualification rate of product during chromium plating on part, and beneficially environmental conservation.
3, employing the method for the invention is after being coated with nickeliferous coating surface chromium plating, due to layers of chrome good stability in an atmosphere also
And there is good corrosion resistance, and the hardness of layers of chrome is high, wearability good, and layers of chrome is glossiness and hardness below 500 DEG C
All without significantly change, there is good thermostability, therefore efficiently solve part at the high temperature of about 400 DEG C and abrasion environment
Under use problem, extend the service life of part.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of part nozzle outer housing being coated with containing nickel coating, in figure, 1 matrix, 2 nickeliferous paintings
Layer.
When Fig. 2 is to use the mode of ladder increase electric current density to carry out current activation, electric current density graph of a relation over time.
Detailed description of the invention
By the following examples the method for the invention is described further.In following each embodiment, described in be coated with nickeliferous painting
The composition containing nickel coating and the content of each component on the nozzle outer housing of layer is: Cr, 1.5～4.0wt%；Al, 18～20wt%；
Co, 0.2～1.2wt%；Mo, 0.2～1.2wt%；Ti, 0.2～1.0wt%；Ni, 72.6～79.9wt%；Described nitric acid is for changing
Classes and grades in school nitric acid, described hydrochloric acid is technical-grade hydrochloric acid, and described sulphuric acid is chemical grade sulphuric acid；The nozzle outer housing of secondary chromium plating is 10.
Embodiment 1
The present embodiment uses the method for the invention chromium plating on the nozzle outer housing 1 being coated with shown in Fig. 1 containing nickel coating, and technique walks
Rapid as follows:
(1) oil removing
To be coated with the nozzle outer housing 1 containing nickel coating as anode, with iron plate as negative electrode, they are immersed in temperature is 70 DEG C of degreasing fluids
In, controlling galvanic electric current density at 5 amperes/square decimeter, the oil removing time is 8 minutes, after the oil removing time arrives, by institute
State nozzle outer housing 1 to take out from degreasing fluid, first clean with the tap water that temperature is 70 DEG C, more clear with the tap water that temperature is room temperature
Wash, to remove the degreasing fluid on described nozzle outer housing 1；
Described degreasing fluid is formulated by sodium hydroxide, tertiary sodium phosphate, sodium carbonate and tap water, and the concentration of sodium hydroxide is 50g/L,
The concentration of tertiary sodium phosphate is 20g/L, and the concentration of sodium carbonate is 65g/L；
(2) deoxygenation compound
By oil removing and after cleaning be coated with the nozzle outer housing 1 containing nickel coating put into temperature be room temperature, percentage by volume be 45%
Aqueous solution of nitric acid soaks 12 seconds and take out, then clean, to remove on described nozzle outer housing 1 with the tap water that temperature is room temperature
Nitric acid；
(3) weak corrosion
By deoxygenation compound the nozzle outer housing 1 containing nickel coating that is coated with after cleaning, to put into temperature be that room temperature, concentration of hydrochloric acid are
The aqueous hydrochloric acid solution of 250g/L soaks 1 minute and take out, then clean, to remove described nozzle with the tap water that temperature is room temperature
Hydrochloric acid on outer housing 1；
(4) activation
By weak corrosion and after cleaning be coated with the nozzle outer housing 1 containing nickel coating put into temperature be room temperature, sulfuric acid concentration be 125g/L
Aqueous sulfuric acid in soak 2 minutes and take out, then clean with tap water that temperature is room temperature, to remove described nozzle outer housing 1
On sulphuric acid；
(5) current activation and chromium plating
Chromic anhydride, sulphuric acid and tap water are added coating bath stir formation chromic anhydride-sulfuric acid mixture liquid, in described mixed liquor, chromic anhydride
Concentration be 225g/L, the concentration of sulphuric acid is 2.3g/L；The temperature of chromic anhydride-sulfuric acid mixture liquid is risen to 56 DEG C, then using as
The lead-antimony alloy plate of anode and the iron plate as negative electrode are immersed in described chromic anhydride-sulfuric acid mixture liquid, then connect DC source and control
Galvanic electric current density is at 15 amperes/square decimeter, when in described mixed liquor, the concentration of trivalent chromic ion reaches 6g/L and i.e. formed
Plating solution, after plating solution is formed, blocks DC source and takes out iron plate；By being coated with outside the nozzle containing nickel coating after activation cleaning
Cover 1 puts into the above-mentioned coating bath equipped with plating solution, with described nozzle outer housing 1 as negative electrode, with lead-antimony alloy plate as anode, controls described
The temperature of plating solution is 56 DEG C, when the temperature of described nozzle outer housing 1 reaches the temperature of plating solution, connects DC source, uses ladder
The mode increasing electric current density carries out current activation, carries out chromium plating when electric current density increases to 40 ampere/square decimeter, in plating
Controlling electric current density during chromium and be maintained at 40 amperes/square decimeter, the chromium plating time is 12 minutes, after the chromium plating time expires, and institute
The thickness containing the layers of chrome covered on nickel coating 2 stating nozzle outer housing 1 reaches 9～12 μm；In described lead-antimony alloy plate, the matter of lead
Amount mark is 94%, the mass fraction of antimony is 6%；
Ladder increases the operation of electric current density: with the speed of 0.5 ampere/square decimeter per second, electric current density is increased to 15 amperes
/ square decimeter also keeps this electric current density 30 seconds, then electric current density increased to the speed of 0.5 ampere/square decimeter per second
30 amperes/square decimeter also keep this electric current density 30 seconds, then with per secondThe speed of ampere/square decimeter is by electric current density
Increase to 40 amperes/square decimeter.
After chromium plating completes, plated part is taken out from coating bath and cleans with the tap water that temperature is room temperature and remove on plated part
Plating solution, the plated part after then cleaning puts into baking oven, normal pressure, 190 DEG C carry out dehydrogenation, the time of dehydrogenation is
3.5 hour.
In the present embodiment, the qualification rate of chromium plating nozzle outer housing 1 reaches 100%.
Embodiment 2
The present embodiment uses the method for the invention chromium plating on the nozzle outer housing 1 being coated with shown in Fig. 1 containing nickel coating, and technique walks
Rapid as follows:
(1) oil removing
To be coated with the nozzle outer housing 1 containing nickel coating as anode, with iron plate as negative electrode, they are immersed in temperature is 80 DEG C of degreasing fluids
In, controlling galvanic electric current density at 7 amperes/square decimeter, the oil removing time is 5 minutes, after the oil removing time arrives, by institute
State nozzle outer housing 1 to take out from degreasing fluid, first clean with the tap water that temperature is 60 DEG C, more clear with the tap water that temperature is room temperature
Wash, to remove the degreasing fluid on described nozzle outer housing 1；
Described degreasing fluid is formulated by sodium hydroxide, tertiary sodium phosphate, sodium carbonate and tap water, and the concentration of sodium hydroxide is 75g/L,
The concentration of tertiary sodium phosphate is 30g/L, and the concentration of sodium carbonate is 100g/L.
(2) deoxygenation compound
By oil removing and after cleaning be coated with the nozzle outer housing 1 containing nickel coating put into temperature be room temperature, percentage by volume be 50%
Aqueous solution of nitric acid soaks 10 seconds and take out, then clean, to remove on described nozzle outer housing 1 with the tap water that temperature is room temperature
Nitric acid.
(3) weak corrosion
By deoxygenation compound the nozzle outer housing 1 containing nickel coating that is coated with after cleaning, to put into temperature be that room temperature, concentration of hydrochloric acid are
The aqueous hydrochloric acid solution of 300g/L soaks 0.5 minute and take out, then clean, to remove described spray with the tap water that temperature is room temperature
Hydrochloric acid on mouth outer housing 1.
(4) activation
By weak corrosion and after cleaning be coated with the nozzle outer housing 1 containing nickel coating put into temperature be room temperature, sulfuric acid concentration be 150g/L
Aqueous sulfuric acid in soak 1 minute and take out, then clean with tap water that temperature is room temperature, to remove described nozzle outer housing 1
On sulphuric acid.
(5) current activation and chromium plating
Chromic anhydride, sulphuric acid and tap water are added coating bath stir formation chromic anhydride-sulfuric acid mixture liquid, in described mixed liquor, chromic anhydride
Concentration be 250g/L, the concentration of sulphuric acid is 2.5g/L；The temperature of chromic anhydride-sulfuric acid mixture liquid is risen to 60 DEG C, then using as
The lead-antimony alloy plate of anode and the iron plate as negative electrode are immersed in described chromic anhydride-sulfuric acid mixture liquid, then connect DC source and control
Galvanic electric current density is at 20 amperes/square decimeter, when in described mixed liquor, the concentration of trivalent chromic ion reaches 8g/L and i.e. formed
Plating solution, after plating solution is formed, blocks DC source and takes out iron plate；By being coated with outside the nozzle containing nickel coating after activation cleaning
Cover 1 puts into the above-mentioned coating bath equipped with plating solution, with described nozzle outer housing 1 as negative electrode, with lead-antimony alloy plate as anode, controls described
The temperature of plating solution is 60 DEG C, when the temperature of described nozzle outer housing 1 reaches the temperature of plating solution, connects DC source, uses ladder
The mode increasing electric current density carries out current activation, carries out chromium plating when electric current density increases to 40 ampere/square decimeter, in plating
Controlling electric current density during chromium and be maintained at 40 amperes/square decimeter, the chromium plating time is 10 minutes, after the chromium plating time expires, and institute
The thickness containing the layers of chrome covered on nickel coating 2 stating nozzle outer housing 1 reaches 9～12 μm；In described lead-antimony alloy plate, the matter of lead
Amount mark is 94%, the mass fraction of antimony is 6%；
Ladder increases the operation of electric current density: with the speed of 0.5 ampere/square decimeter per second, electric current density is increased to 15 amperes
/ square decimeter also keeps this electric current density 30 seconds, then electric current density increased to the speed of 0.5 ampere/square decimeter per second
30 amperes/square decimeter also keep this electric current density 30 seconds, then with per secondThe speed of ampere/square decimeter is by electric current density
Increase to 40 amperes/square decimeter；
After chromium plating completes, plated part is taken out from coating bath and cleans with the tap water that temperature is room temperature and remove on plated part
Plating solution, the plated part after then cleaning puts into baking oven, normal pressure, 180 DEG C carry out dehydrogenation, the time of dehydrogenation is
4 hours.
In the present embodiment, the qualification rate of chromium plating nozzle outer housing 1 reaches 90%.
Embodiment 3
The present embodiment uses the method for the invention chromium plating on the nozzle outer housing 1 being coated with containing nickel coating, and processing step is as follows:
(1) oil removing
To be coated with the nozzle outer housing 1 containing nickel coating as anode, with iron plate as negative electrode, they are immersed in temperature is 60 DEG C of degreasing fluids
In, controlling galvanic electric current density at 3 amperes/square decimeter, the oil removing time is 10 minutes, after the oil removing time arrives, will
Described nozzle outer housing 1 takes out from degreasing fluid, first cleans with the tap water that temperature is 80 DEG C, then is the tap water of room temperature by temperature
Clean, to remove the degreasing fluid on described nozzle outer housing 1；
Described degreasing fluid is formulated by sodium hydroxide, tertiary sodium phosphate, sodium carbonate and tap water, and the concentration of sodium hydroxide is 25g/L,
The concentration of tertiary sodium phosphate is 10g/L, and the concentration of sodium carbonate is 30g/L.
(2) deoxygenation compound
By oil removing and after cleaning be coated with the nozzle outer housing 1 containing nickel coating put into temperature be room temperature, percentage by volume be 40%
Aqueous solution of nitric acid soaks 15 seconds and take out, then clean, to remove on described nozzle outer housing 1 with the tap water that temperature is room temperature
Nitric acid.
(3) weak corrosion
By deoxygenation compound the nozzle outer housing 1 containing nickel coating that is coated with after cleaning, to put into temperature be that room temperature, concentration of hydrochloric acid are
The aqueous hydrochloric acid solution of 200g/L soaks 2 minutes and take out, then clean, to remove described nozzle with the tap water that temperature is room temperature
Hydrochloric acid on outer housing 1.
(4) activation
By weak corrosion and after cleaning be coated with the nozzle outer housing 1 containing nickel coating put into temperature be room temperature, sulfuric acid concentration be 100g/L
Aqueous sulfuric acid in soak 3 minutes and take out, then clean with tap water that temperature is room temperature, to remove described nozzle outer housing 1
On sulphuric acid.
(5) current activation and chromium plating
Chromic anhydride, sulphuric acid and tap water are added coating bath stir formation chromic anhydride-sulfuric acid mixture liquid, in described mixed liquor, chromic anhydride
Concentration be 200g/L, the concentration of sulphuric acid is 2g/L；The temperature of chromic anhydride-sulfuric acid mixture liquid is risen to 52 DEG C, then will be as sun
The lead-antimony alloy plate of pole and the iron plate as negative electrode are immersed in described chromic anhydride-sulfuric acid mixture liquid, then connect DC source and control straight
The electric current density of stream electricity is at 10 amperes/square decimeter, when in described mixed liquor, the concentration of trivalent chromic ion reaches 3g/L and i.e. forms plating
Liquid, after plating solution is formed, blocks DC source and takes out iron plate；By the nozzle outer housing being coated with containing nickel coating after activation cleaning
1 puts into the above-mentioned coating bath equipped with plating solution, with described nozzle outer housing 1 as negative electrode, with lead-antimony alloy plate as anode, controls described plating
The temperature of liquid is 52 DEG C, when the temperature of described nozzle outer housing 1 reaches the temperature of plating solution, connects DC source, uses ladder to increase
The mode adding electric current density carries out current activation, carries out chromium plating when electric current density increases to 40 ampere/square decimeter, in chromium plating
During control electric current density be maintained at 40 amperes/square decimeter, the chromium plating time is 15 minutes, after the chromium plating time expires, described
The thickness containing the layers of chrome covered on nickel coating 2 of nozzle outer housing 1 reaches 9～12 μm；In described lead-antimony alloy plate, the quality of lead
Mark is 94%, the mass fraction of antimony is 6%；
Ladder increases the operation of electric current density: with the speed of 0.5 ampere/square decimeter per second, electric current density is increased to 15 amperes
/ square decimeter also keeps this electric current density 30 seconds, then electric current density increased to the speed of 0.5 ampere/square decimeter per second
30 amperes/square decimeter also keep this electric current density 30 seconds, then with per secondThe speed of ampere/square decimeter is by electric current density
Increase to 40 amperes/square decimeter；
After chromium plating completes, plated part is taken out from coating bath and cleans with the tap water that temperature is room temperature and remove on plated part
Plating solution, the plated part after then cleaning puts into baking oven, normal pressure, 200 DEG C carry out dehydrogenation, the time of dehydrogenation is
3 hours.
In the present embodiment, the qualification rate of chromium plating nozzle outer housing 1 reaches 90%.
Claims (5)
1. in the method being coated with on the part containing nickel coating chromium plating, it is characterised in that processing step is as follows:
(1) oil removing
To be coated with the part containing nickel coating as anode, with iron plate as negative electrode, they are immersed in temperature is in 60～80 DEG C of degreasing fluids,
Controlling galvanic electric current density at 3～7 amperes/square decimeter, the oil removing time is 5～10 minutes, after the oil removing time arrives,
Take out being coated with the part containing nickel coating from degreasing fluid, first clean with the water that temperature is 60～80 DEG C, then be room temperature by temperature
Water clean, to remove the degreasing fluid on described part；
Described degreasing fluid is formulated by sodium hydroxide, tertiary sodium phosphate, sodium carbonate and tap water, the concentration of sodium hydroxide be 25～
75g/L, the concentration of tertiary sodium phosphate is 10～30g/L, and the concentration of sodium carbonate is 30～100g/L；
(2) deoxygenation compound
The part containing nickel coating that is coated with after oil removing cleaning is put into immersion 10～15 in the aqueous solution of nitric acid that temperature is room temperature
Second take out, then clean, to remove the nitric acid on described part with water that temperature is room temperature；
In described aqueous solution of nitric acid, the percentage by volume of nitric acid is 40～50%；
(3) weak corrosion
The part containing nickel coating that is coated with after deoxygenation compound cleaning is put into immersion in the aqueous hydrochloric acid solution that temperature is room temperature
Within 0.5～2 minute, take out, then clean, to remove the hydrochloric acid on described part with the water that temperature is room temperature；
In described aqueous hydrochloric acid solution, the concentration of hydrochloric acid is 200～300g/L；
(4) activation
The part containing nickel coating that is coated with after weak corrosion cleaning is put into immersion 1～3 in the aqueous sulfuric acid that temperature is room temperature
Minute take out, then clean, to remove the sulphuric acid on described part with water that temperature is room temperature；
In described aqueous sulfuric acid, the concentration of sulphuric acid is 100～150g/L；
(5) current activation and chromium plating
The part containing nickel coating that is coated with after activation cleaning is put into the coating bath equipped with plating solution, to be coated with zero containing nickel coating
Part is negative electrode, and with lead-antimony alloy plate as anode, the temperature controlling described plating solution is 52～60 DEG C, when the temperature of described part reaches
During to the temperature of plating solution, connecting DC source, the mode using ladder to increase electric current density carries out current activation, works as electric current density
Increase to carry out chromium plating during 40 ampere/square decimeter, chrome-plating process control electric current density and is maintained at 40 amperes/square decimeter,
The chromium plating time should make the described part layers of chrome thickness containing nickel coating overlying lid reach 9～12 μm；
The preparation method of described plating solution is: chromic anhydride, sulphuric acid and tap water are added coating bath and the formation chromic anhydride-sulphuric acid that stirs mixes
Closing liquid, in described mixed liquor, the concentration of chromic anhydride is 200～250g/L, and the concentration of sulphuric acid is 2～2.5g/L；With lead-antimony alloy plate
For anode, with iron plate as negative electrode, they are immersed in chromic anhydride-sulfuric acid mixture liquid that temperature is 52～60 DEG C, control galvanic
Electric current density is at 10～20 amperes/square decimeter, when in described mixed liquor, the concentration of trivalent chromic ion reaches 3～8g/L and i.e. formed
Plating solution, after plating solution is formed, blocks DC source and takes out iron plate.
The most according to claim 1 in the method being coated with on the part containing nickel coating chromium plating, it is characterised in that step (5)
In, ladder increases the operation of electric current density and is: with the speed of 0.5 ampere/square decimeter per second, electric current density is increased to 15 amperes
/ square decimeter also keeps this electric current density 30 seconds, then electric current density increased to the speed of 0.5 ampere/square decimeter per second
30 amperes/square decimeter also keep this electric current density 30 seconds, then with per secondThe speed of ampere/square decimeter is by electric current density
Increase to 40 amperes/square decimeter.
The most according to claim 1 or claim 2 in the method being coated with on the part containing nickel coating chromium plating, it is characterised in that described lead
In-antimony alloy plate, the mass fraction of lead is 94%, and the mass fraction of antimony is 6%.
The most according to claim 1 or claim 2 in the method being coated with on the part containing nickel coating chromium plating, it is characterised in that step (2)
In, described nitric acid is chemical grade nitric acid；In step (3), described hydrochloric acid is technical-grade hydrochloric acid；Step (4) and step (5)
In, described sulphuric acid is chemical grade sulphuric acid.
The most according to claim 3 in the method being coated with on the part containing nickel coating chromium plating, it is characterised in that step (2)
In, described nitric acid is chemical grade nitric acid；In step (3), described hydrochloric acid is technical-grade hydrochloric acid；Step (4) and step (5)
In, described sulphuric acid is chemical grade sulphuric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310573185.0A CN103628097B (en) | 2013-11-15 | 2013-11-15 | In the method being coated with on the part containing nickel coating chromium plating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310573185.0A CN103628097B (en) | 2013-11-15 | 2013-11-15 | In the method being coated with on the part containing nickel coating chromium plating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103628097A CN103628097A (en) | 2014-03-12 |
| CN103628097B true CN103628097B (en) | 2017-01-04 |
Family
ID=50209538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310573185.0A Active CN103628097B (en) | 2013-11-15 | 2013-11-15 | In the method being coated with on the part containing nickel coating chromium plating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103628097B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106811755A (en) * | 2017-02-28 | 2017-06-09 | 武汉延锋时代检测技术服务有限公司 | A kind of nickel base superalloy chrome-plated process |
| CN111519234B (en) * | 2020-04-30 | 2022-04-29 | 中国航发成都发动机有限公司 | Clamp for chromium plating of aero-engine case and chromium plating method thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS572892A (en) * | 1980-06-07 | 1982-01-08 | Nippon Steel Corp | Chrome plated steel plate of superior corrosion resistance and weldability |
| DE3220723A1 (en) * | 1982-06-02 | 1983-12-08 | Gewerkschaft Eisenhütte Westfalia, 4670 Lünen | METHOD FOR APPLYING A CORROSION-RESISTANT AND WEAR-RESISTANT COATING TO THE PISTON RODS OF WORK CYLINDERS, IN PARTICULAR FOR USE IN UNDERGROUND MINING AND THE LIKE. |
| JPS6040692A (en) * | 1983-08-15 | 1985-03-04 | Nippon Steel Weld Prod & Eng Co Ltd | Production of flux cored wire for welding |
| CN1687486A (en) * | 2005-02-17 | 2005-10-26 | 建设工业(集团)有限责任公司 | Method for plating hard chromium on surface of metallic material |
| CN101498255A (en) * | 2009-03-04 | 2009-08-05 | 仪征双环活塞环有限公司 | Side rapid chrome plating piston ring and processing method |
| CN102703899A (en) * | 2012-06-25 | 2012-10-03 | 郑州煤矿机械集团股份有限公司 | Surface treatment process for hydraulic support intermediate cylinder, plunger and piston rod used under coalmine well |
| CN102839404B (en) * | 2012-09-20 | 2015-04-15 | 贵州红林机械有限公司 | Method for electroplating hard chrome on outer circle of molybdenum material-type workpiece |
| CN103132114B (en) * | 2013-03-21 | 2016-02-10 | 湖南特力液压有限公司 | The manufacture method of wear-resisting workpiece and scuff-resistant coating thereof |
-
2013
- 2013-11-15 CN CN201310573185.0A patent/CN103628097B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103628097A (en) | 2014-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109402699A (en) | A kind of aluminum alloy surface acid resistance corrosion function ceramic membrane preparation process | |
| CN108179418B (en) | Preparation method of zinc-nickel alloy coating structure suitable for strong corrosion environment | |
| EP2370615A1 (en) | Electroplating method and electroplated product | |
| JP5662894B2 (en) | Steel material for the upper deck of crude oil tankers with excellent corrosion resistance or cargo for bulk carriers | |
| US20090211914A1 (en) | Trivalent Chromium Electroplating Solution and an Operational Method Thereof | |
| CN103882492B (en) | Metallic matrix chemical plating pre-treating method | |
| CN101135050B (en) | Metasilicate cleaning inactivating process | |
| CN101831684A (en) | Microarc-oxidation electrophoretic-coating composite processing method of surface of Q 235 steel part | |
| KR20160130299A (en) | Passivation of micro-discontinuous chromium deposited from a trivalent electrolyte | |
| WO2009007208A1 (en) | Methods for reducing hexavalent chromium in trivalent chromate conversion coatings | |
| CN104120462B (en) | Steel cord is without the cuprous brass plating of cyanogen and the passivating method of brass coating | |
| CN104726911A (en) | Stainless steel surface treatment method | |
| CN103628097B (en) | In the method being coated with on the part containing nickel coating chromium plating | |
| CN105714229A (en) | Al-Zn-Si-C hot-dip coating liquid and hot-dip coating process | |
| CN104532316B (en) | Anti-nitridation process for copper-tin composite plating | |
| CN108165958A (en) | A kind of method of red copper surface chemical Ni-P plating-graphene composite deposite | |
| CN106119907A (en) | A kind of chrome-plating method of automobile rustless steel tail gas decoration | |
| CN108642502B (en) | Corrosion-resistant pretreatment method of aluminum alloy | |
| CN104611745B (en) | Stainless steel surfaces high corrosion resistant Pd Co graded alloy electroplating technology | |
| CN109797413A (en) | The electro-plating method of Ni-P-SiC composite deposite electroplate liquid and alloy matrix aluminum | |
| CN102953106A (en) | Protective layer for metal surface and preparation thereof | |
| CN103074649B (en) | Strengthen mine individual hydraulic prop cylinder tube preserving method | |
| CN106086857A (en) | Film forming solution that Optimization-type Chrome-free yellow conversion film is worked in coordination with on a kind of aluminum based material surface and the method preparing conversion film thereof | |
| CN105695991A (en) | Corrosion-resistance and wear-resistance multilayer coating | |
| CN107034464A (en) | A kind of preparation method of multifunctional protection layer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Xindu District of Chengdu city in Sichuan province 610503 Shulong avenue into the industrial park into a technology center Patentee after: China Hangfa aviation Polytron Technologies Inc Address before: Xindu District of Chengdu city in Sichuan province 610503 Shulong avenue into the industrial park into a technology center Patentee before: Sichuan Chengfa Aviation Science & Technology Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder |