CN110029379A - Ultra-wide stainless steel materials nickel plating appearance optimization technique - Google Patents
Ultra-wide stainless steel materials nickel plating appearance optimization technique Download PDFInfo
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- CN110029379A CN110029379A CN201910366079.2A CN201910366079A CN110029379A CN 110029379 A CN110029379 A CN 110029379A CN 201910366079 A CN201910366079 A CN 201910366079A CN 110029379 A CN110029379 A CN 110029379A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/562—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of iron or nickel or cobalt
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/10—Electroplating with more than one layer of the same or of different metals
- C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
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Abstract
The invention discloses ultra-wide stainless steel materials nickel plating appearance optimization techniques, belong to nickel-plating technology field, ultra-wide stainless steel materials nickel plating appearance optimization technique, comprising the following steps: step 1, degreasing；Step 2, hot water embathe；Step 3, sulfuric acid are washed；Step 4, pure water hydro-peening；Step 5, pre- nickel；Step 6 corrects nickel；Step 7: general nickel；Step 8, cleaning are embathed；Step 9, post-processing；Step 10, ultrasonic cleaning；Step 11, drying；Step 12, drying；Step 13, assist rewinding, it may be implemented to increase nickel-phosphorus alloy technique between preplating and the general nickel coating of plating, the deposition velocity that coating can not only be increased, can also significantly improve nickel coating lattice, refine close structure lattice, reduce the porosity of coating, to guarantee the homogeneity and glossiness of general nickel layer appearance, plated layer compact degree, uniformity and binding force are improved, corrosion resistance improves.
Description
Technical field
The present invention relates to nickel-plating technology fields, more specifically to ultra-wide stainless steel materials nickel plating appearance optimization technique.
Background technique
The density of nickel is 8.907g/cm3, 1450 DEG C of fusing point, the intensity of nickel is high, plasticity is good, hardness is high, wearability is good, can
Forging property is strong, and easy to process, corrosion resistance is good, and especially alkali resistant corrosion is good, high temperature resistant, and contact resistance is small, in electroplating industry production,
The output of nickel coating is only second to zinc coat and is located at second.
Stainless steel bright nickel plating --- nickel layer is the silvery white non-ferrous metal of micro-strip yellow light, with improve the hardness on surface, wearability and
Surface flat, and the corrosion that contact electromotive force is generated with stainless steel is avoided, its hardness is thans copper, zinc, tin, cadmium, gold, silver etc.
Height, but it is lower than chromium and rhodium metal, there is very high chemical stability in air, have preferable stability to alkali；Stainless steel is general
Logical nickel plating (dark plating), Common platings are also known as dark nickel technique, and according to the performance and purposes of plating solution, common nickel plating can be divided into low concentration
Pre-plating solution, common plating solution, Watts bath and barrel plating liquid etc.；High-sulfur nickel coating is mainly used for steel, the anti-guarantor of kirsite matrix, decoration
The middle layer of property combined plating, principle is that upper layer bright nickel is higher than the bright nickel sulfur content of lower layer half, thus makes the current potential of two interlayers
Difference arrives 100-140mV, so that double layer nickel is changed into lateral encroaching by longitudinal corrosion of single layer nickel in this way, constitutes the electricity to steel substrate
Chemoproection effect；Nickel envelope is that insoluble solid particle of the diameter between 0.01~~1um is being added in general bright nickel liquid
(Sio2 etc.) makes these particles and nickel be co-deposited and form composite nickel coating in the case where coprecipitated accumulation promoting appropriate helps；Satin face
Nickel is called satin shape nickel, satin face nickel and the not essential difference of nickel envelope technique, it has the appearance of silks and satins shape, will not be as light after plating network
Nickel coating chromium plating has a flash of light like that, thus human eye watch attentively after will not feel fatigue, can be used as the anti-dazzle plating for avoiding light from reflecting
Layer；Suitable additive is added in specific nickel-plating liquid, the biggish easy nickel layer being cracked into micro-crack of stress can be obtained, this
Kind nickel layer, is called high stress nickel；Multi-layer nickel-plating is to select different plating solution composition and process conditions on same matrix, is obtained
Two layers or three layers of nickel coating, it is therefore an objective on the basis of not increasing nickel layer thickness or lowering nickel layer, increase the anti-corrosion energy of nickel layer
Power.
But above-mentioned several nickel plating technologies, it is easy to appear problem of appearance when facing the stainless steel plate of supper wide type, it is stainless
Steel plate width is wider, and size is bigger, and the homogeneity and stability of the nickel coating appearance of traditional nickel plating technology are more difficult to reach, plating
Layer consistency and uniformity are poor, and binding force is lower, and lustrous surface is not uniform enough.
Summary of the invention
1. technical problems to be solved
Aiming at the problems existing in the prior art, the purpose of the present invention is to provide ultra-wide stainless steel materials nickel plating appearance is excellent
Chemical industry skill, it may be implemented to increase nickel-phosphorus alloy technique between preplating and the general nickel coating of plating, while by mild in plating solution
Uniform addition catalyst, surfactant, organic acid promotor and rare earth addition can not only increase the deposition speed of coating
Degree, can also significantly improve nickel coating lattice, refine close structure lattice, the porosity of coating is reduced, to guarantee general nickel layer
The homogeneity and glossiness of appearance, improve plated layer compact degree, uniformity and binding force, and corrosion resistance improves.
2. technical solution
To solve the above problems, the present invention adopts the following technical scheme that.
Ultra-wide stainless steel materials nickel plating appearance optimization technique, comprising the following steps:
Degreasing: step 1 carries out pre-cathode degreasing and cathode ungrease treatment to ultra-wide stainless steel materials；
Step 2, hot water embathe: carrying out embathing processing to the ultra-wide stainless steel materials after degreasing using 50 DEG C of tap water；
Step 3, sulfuric acid are washed: carrying out sun to ultra-wide stainless steel materials using the sulfuric acid solution of 5-10 Baume degrees at room temperature
Pole activation；
Step 4, pure water hydro-peening；
Pre- nickel: step 5 under conditions of temperature 50 C, current density 3-5ASD, utilizes the pre-plating solution of 25-35 Baume degrees
Ultra-wide stainless steel materials are electroplated；
Step 6 corrects nickel: under conditions of 65-75 DEG C of temperature, current density 2-5ASD, utilizing 25-35 Baume degrees
Ultra-wide stainless steel materials are electroplated in nickel-phosphorus alloy amendment plating solution；
Step 7: general nickel: under conditions of 50-60 DEG C of temperature, current density 2-5ASD, the general of 25-35 Baume degrees is utilized
Ultra-wide stainless steel materials are electroplated in logical plating solution；
Step 8, cleaning are embathed: after the completion of the plating of ultra-wide stainless steel materials, utilizing the pure water of 10 grams per liters at room temperature
Ultra-wide stainless steel materials are embathed；
Post-processing: step 9 utilizes 50 DEG C, the pure water ultra-wide stainless steel materials of 60 grams per liters after passivation；
Ultrasonic cleaning: step 10 carries out ultrasound to ultra-wide stainless steel materials using pure water under conditions of temperature 50 C
Wave vibration washing；
Drying: step 11 carries out ultra-wide stainless steel materials using the oil-free air blower of Lu Shi air-dried；
Step 12, drying: 100-150 DEG C of drying temperature, drying time 10s or more；
Step 13 assists rewinding, may be implemented to increase nickel-phosphorus alloy technique between preplating and the general nickel coating of plating, simultaneously
It, not only can be with by uniform addition catalyst mild in plating solution, surfactant, organic acid promotor and rare earth addition
The deposition velocity for increasing coating, can also significantly improve nickel coating lattice, refine close structure lattice, reduce the hole of coating
Rate improves plated layer compact degree, uniformity and binding force, corrosion resistance to guarantee the homogeneity and glossiness of general nickel layer appearance
It can improve.
Further, the nickel-phosphorus alloy amendment plating solution includes nickel sulfate, nickel chloride, sodium hypophosphite, boric acid and fluorination
Sodium, and the pH value of nickel-phosphorus alloy amendment plating solution is 2.0-2.8, traditional plating solution uses phosphorous acid nickel salt system, and phosphorous acid is phosphorus
Main source, the characteristics of system is that phosphorous acid solubility under higher pH value is very low, can only to guarantee phosphorus content in coating
It being electroplated (pH value 0.5-1.0) under low pH value, thus causes a large amount of liberations of hydrogen of cathode, coating generates air-flow trace phenomenon, and
Cathode efficiency is reduced, it is uneven to make cathode and anode current efficiency, so that nickel ion in plating solution be made to increase, nickel ion is caused to contain
Measure excessively high, phosphorus content reduces, and influences the deposition of coating, declines the bright property of coating, or even have the phenomenon that do not plate, and nickel phosphorus
The phosphorus of alloy amendment plating solution mostlys come from sodium hypophosphite, and pH value 2.0-2.8 is high compared with the pH value of phosphorous acid system, can
To avoid disadvantage mentioned above, sodium fluoride can promote the buffering effect of boric acid in formula, cathode limit current density be improved, because of fluorine
Ion and borate act on forming fluoboric acid root, but can make brittle coating when too high levels.
Further, the concentration of nickel sulfate is 240g/L, and the chlorination nickel concentration is 45g/L, the sodium hypophosphite
Concentration is 60g/L, and the boric acid concentration is 35g/L, and the concentration of sodium fluoride is 30g/L, and ortho phosphorous acid salt form plating solution is compared with phosphorous
The nickel phosphorus electroplated layer of acid type plating solution has better brightness, faster plating speed and higher coating hardness.
Further, described Step 5: in six, seven ultra-wide stainless steel materials plating before utilize mild adding set
Appropriate amount of addition agent is added in order into pre-plating solution, nickel-phosphorus alloy amendment plating solution and common plating solution respectively.
Further, the auxiliary agent includes catalyst, surfactant, organic acid promotor and rare earth addition, catalysis
The effect of agent is that ultra-wide stainless steel materials play catalytic action in the displacement reaction of Surface Creation coating in the plating process；Surface
The effect of activating agent is to reduce the porosity of coating；The effect of organic acid promotor is temperature needed for reducing reaction, increases plating
Layer deposition velocity；The effect of rare earth addition is to increase the active site number of catalytic surface, reduces plating layer porosity, rare earth and plating
Specific complexing agent in liquid forms bridge ligand, accelerates the transmission speed of electronics during redox reaction, and it is heavy to increase coating
Product speed.
Further, the mild adding set includes electroplating bath and premix case, and the electroplating bath left and right ends are fixed
It is connected with extension platform, protection board is equipped on the upside of the premix case, is fixedly connected between the protection board and a pair of of extension platform
Column, the premix case upper end is communicated with adding tube, and adding tube through protection board and extends on the upside of protection board, the premix
Case lower end is fixedly connected with more equally distributed shunting injecting pipes, is equipped with solenoid valve, Yi Duisuo on the shunting injecting pipe
It states column one end close to each other and is fixedly installed with electronic slide unit, it is solid between the sliding end and premix case side wall of the electronic slide unit
Fixed to connect, digging on the shunting injecting pipe has multiple equally distributed superfine liquid drain holes, and activity is equipped on the downside of the premix case
Charcoal filter screen, and be fixedly connected between activated charcoal strainer and more shunting injecting pipes, it can be mildly equably to electroplating bath
Interior plating solution adds auxiliary agent, especially rare earth addition, and the solubility of rare earth addition is smaller, the rare earth that part is not completely dissolved
Additive is added to the coating formed in plating solution it is possible that burr, reduces the homogeneity of coating surface, activated charcoal strainer
Effect rare earth undissolved in plating solution and contaminant filter can be gone out and collected away before plating.
Further, a pair of of heating wire is installed in the premix case, and a pair of of heating wire with the same external power supply
It is electrically connected, is also equipped with ultrasonic wave stirring rod in the premix case, the auxiliary agent in premix case can be preheated and be stirred
Mixing.
Further, in the step 1 pre-cathode degreasing and cathode degreasing in 50-60 DEG C of temperature, current density 5-
It uses weight percent for the metal degreasing agent of 5-10% under conditions of 10ASD, improves the degreasing rate of ultra-wide stainless steel materials.
Further, it is passivated under conditions of 40 DEG C of temperature, pH value 8-9 in the step 9, the solution composition of passivation is
Potassium bichromate 12-15g/L, sodium hydroxide 2.5-3.0g/L, sodium carbonate 1.5-2.5g/L, and passivation time are 3-10min.
Further, it is washed after being passivated in the step 9 using multi-stage countercurrent, vibration of ultrasonic wave in the step 10
Mode is side vibration, improves water washing effect.
3. beneficial effect
Compared with the prior art, the present invention has the advantages that
(1) this programme may be implemented to increase nickel-phosphorus alloy technique between preplating and the general nickel coating of plating, while by plating
Mild uniform addition catalyst, surfactant, organic acid promotor and rare earth addition, can not only increase coating in liquid
Deposition velocity, can also significantly improve nickel coating lattice, make close structure lattice refine, the porosity of coating is reduced, to protect
The homogeneity and glossiness of general nickel layer appearance are demonstrate,proved, plated layer compact degree, uniformity and binding force are improved, corrosion resistance improves.
(2) nickel-phosphorus alloy amendment plating solution includes nickel sulfate, nickel chloride, sodium hypophosphite, boric acid and sodium fluoride, and nickel phosphorus closes
The pH value of gold amendment plating solution is 2.0-2.8, and traditional plating solution uses phosphorous acid nickel salt system, and phosphorous acid is the main source of phosphorus,
The characteristics of system is that phosphorous acid solubility under higher pH value is very low, can only be under low pH value to guarantee phosphorus content in coating
It is electroplated (pH value 0.5-1.0), thus causes a large amount of liberations of hydrogen of cathode, coating generates air-flow trace phenomenon, and reduces cathode electricity
Efficiency is flowed, it is uneven to make cathode and anode current efficiency, so that nickel ion in plating solution be made to increase, leads to nickel ion too high levels, phosphorus contains
Amount reduces, and influences the deposition of coating, declines the bright property of coating, or even have the phenomenon that do not plate, and nickel-phosphorus alloy amendment plating
The phosphorus of liquid mostlys come from sodium hypophosphite, and pH value 2.0-2.8 is high compared with the pH value of phosphorous acid system, can be to avoid above
Disadvantage, sodium fluoride can promote the buffering effect of boric acid in formula, cathode limit current density be improved, because of fluorine ion and boric acid
Root acts on forming fluoboric acid root, but can make brittle coating when too high levels.
(3) concentration of nickel sulfate is 240g/L, and chlorination nickel concentration is 45g/L, and ortho phosphorous acid na concn is 60g/L, and boric acid is dense
Spending is 35g/L, concentration of sodium fluoride 30g/L, and ortho phosphorous acid salt form plating solution has more preferably compared with the nickel phosphorus electroplated layer of phosphite-type plating solution
Brightness, plating speed and higher coating hardness faster.
(4) Step 5: using mild adding set respectively to preplating before the plating of ultra-wide stainless steel materials in six, seven
Add appropriate amount of addition agent in order in liquid, nickel-phosphorus alloy amendment plating solution and common plating solution, auxiliary agent include catalyst, surfactant,
Organic acid promotor and rare earth addition, the effect of catalyst are that ultra-wide stainless steel materials are plated in Surface Creation in the plating process
Catalytic action is played in the displacement reaction of layer；The effect of surfactant is to reduce the porosity of coating；The work of organic acid promotor
With being temperature needed for reducing reaction, increase coating deposition rate；The effect of rare earth addition is to increase the activity of catalytic surface
Point number, reduces plating layer porosity, and the specific complexing agent in rare earth and plating solution forms bridge ligand, accelerates redox reaction mistake
The transmission speed of electronics in journey increases coating deposition rate.
It (5) can mildly equably plating solution into electroplating bath adds auxiliary agent, especially rare earth addition, rare earth addition
Solubility it is smaller, the rare earth addition that is not completely dissolved of part is added to the coating formed in plating solution it is possible that burr,
Reduce the homogeneity of coating surface, the effect of activated charcoal strainer can be before plating to rare earth undissolved in plating solution and miscellaneous
Matter is filtered out and is collected away.
(6) it premixes and a pair of of heating wire is installed in case, and a pair of of heating wire is electrically connected with the same external power supply, in advance
It is also equipped with ultrasonic wave stirring rod in mixed case, the auxiliary agent in premix case can be preheated and is stirred.
(7) in step 1 pre-cathode degreasing and cathode degreasing in 50-60 DEG C of temperature, the condition of current density 5-10ASD
It is lower to use weight percent for the metal degreasing agent of 5-10%, improve the degreasing rate of ultra-wide stainless steel materials.
(8) it is washed after being passivated in step 9 using multi-stage countercurrent, the mode of vibration of ultrasonic wave is side vibration in step 10, is improved
Water washing effect.
Detailed description of the invention
Fig. 1 is process flow chart of the invention；
Fig. 2 is the component table that nickel-phosphorus alloy of the present invention corrects bath portion；
Fig. 3 is the structural schematic diagram of the mild adding set part of the present invention；
Fig. 4 is the relational graph in plating solution of the present invention between rare earth addition content and plating layer porosity.
Figure label explanation:
1 electroplating bath, 2 extension platforms, 3 columns, 4 protection boards, 5 premix casees, 6 adding tubes, 7 heating wire, 8 ultrasonic wave stirring rod, 9
Electronic slide unit, 10 shunt injecting pipe, 11 solenoid valves, 12 activated charcoal strainers.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description；Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments, is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the instruction such as term " on ", "lower", "inner", "outside", " top/bottom end "
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention and simplification retouch
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.In addition, term " first ", " second " are used for description purposes only, and cannot understand
For indication or suggestion relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation " " is set
Be equipped with ", " be arranged/connect ", " connection " etc., shall be understood in a broad sense, such as " connection ", may be a fixed connection, be also possible to removable
Connection is unloaded, or is integrally connected, can be mechanical connection, is also possible to be electrically connected, can be directly connected, it can also be in
Between medium be indirectly connected, can be the connection inside two elements, for the ordinary skill in the art, can be specific
Situation understands the concrete meaning of above-mentioned term in the present invention.
Embodiment 1:
Referring to Fig. 1, ultra-wide stainless steel materials nickel plating appearance optimization technique, comprising the following steps:
Step 1, degreasing: carrying out pre-cathode degreasing and cathode ungrease treatment to ultra-wide stainless steel materials, pre-cathode degreasing and
Cathode degreasing uses weight percent de- for the metal of 5-10% under conditions of 50-60 DEG C of temperature, current density 5-10ASD
Rouge agent improves the degreasing rate of ultra-wide stainless steel materials, removes ultra-wide stainless steel materials surface fat class grease stain and other Organics
Dirt to obtain good electroplating effect, and prevents the pollution to finishing operations；
Step 2, hot water embathe: carrying out embathing processing to the ultra-wide stainless steel materials after degreasing using 50 DEG C of tap water；
Step 3, sulfuric acid are washed: carrying out anode to ultra-wide stainless steel materials using the sulfuric acid solution of 10 Baume degrees at room temperature
The oxidation film layer for thoroughly removing ultra-wide stainless steel materials is played in activation, increases conductivity, increases the effect of binding force of cladding material etc.；
Step 4, pure water hydro-peening；
Step 5, pre- nickel: under conditions of temperature 50 C, current density 5ASD, using the pre-plating solution of 35 Baume degrees to super
Wide stainless steel materials are electroplated, and when plating, coating material is easy to be deposited on ultra-wide stainless steel materials surface, and coating is caused to dredge
Pine, binding force is poor, and the purpose of pre- nickel is exactly to plate the good transition zone of binding force in advance on ultra-wide stainless steel materials surface, plating later
Layer could be good with ultra-wide stainless steel materials binding force；
Step 6 corrects nickel: under conditions of 75 DEG C of temperature, current density 5ASD, utilizing the nickel-phosphorus alloy of 35 Baume degrees
Ultra-wide stainless steel materials are electroplated in amendment plating solution, for improving nickel coating lattice, reduce the porosity of nickel coating, improve plating
Layer binding force, to guarantee the homogeneity and glossiness of subsequent general nickel layer appearance；
Step 7: general nickel: under conditions of temperature 60 C, current density 5ASD, the common plating solution pair of 35 Baume degrees is utilized
Ultra-wide stainless steel materials are electroplated；
Step 8, cleaning are embathed: after the completion of the plating of ultra-wide stainless steel materials, utilizing the pure water of 10 grams per liters at room temperature
Ultra-wide stainless steel materials are embathed；
Step 9, post-processing: using 50 DEG C, the pure water ultra-wide stainless steel materials of 60 grams per liters after passivation, in temperature 40
DEG C, be passivated under conditions of pH value 8, the solution composition of passivation is potassium bichromate 15g/L, sodium hydroxide 3.0g/L, sodium carbonate 2.5g/
L, and passivation time is 10min, is washed after passivation using multi-stage countercurrent；
Ultrasonic cleaning: step 10 carries out ultrasound to ultra-wide stainless steel materials using pure water under conditions of temperature 50 C
Wave vibration washing, and vibration mode is side vibration；
Step 11, drying: carrying out ultra-wide stainless steel materials using the oil-free air blower of Lu Shi air-dried, and air needs to carry out
Filtration, purification；
Step 12, drying: 100 DEG C of drying temperature, drying time 20s；
Step 13 assists rewinding.
Referring to Fig. 2, nickel-phosphorus alloy amendment plating solution includes nickel sulfate, nickel chloride, sodium hypophosphite, boric acid and sodium fluoride,
And the pH value of nickel-phosphorus alloy amendment plating solution is 2.5, traditional plating solution uses phosphorous acid nickel salt system, and phosphorous acid is the main next of phosphorus
The characteristics of source, the system is that phosphorous acid solubility under higher pH value is very low, can only be in low pH value to guarantee phosphorus content in coating
Under be electroplated, thus cause a large amount of liberations of hydrogen of cathode, coating generates air-flow trace phenomenon, and reduces cathode efficiency, makes yin, yang
Electrode current efficiency is uneven, so that nickel ion in plating solution be made to increase, leads to nickel ion too high levels, phosphorus content reduces, influences to plate
Layer deposition, decline the bright property of coating, or even have the phenomenon that do not plate, and nickel-phosphorus alloy correct plating solution phosphorus mainly from
In sodium hypophosphite, pH value 2.5 is high compared with the pH value of phosphorous acid system, can be to avoid disadvantage mentioned above, and sodium fluoride can in formula
To promote the buffering effect of boric acid, cathode limit current density is improved, because fluorine ion and borate act on forming fluoboric acid root,
But brittle coating can be made when too high levels, concentration of nickel sulfate 240g/L, chlorination nickel concentration is 45g/L, ortho phosphorous acid na concn
For 60g/L, boric acid concentration 35g/L, concentration of sodium fluoride 30g/L, nickel of the ortho phosphorous acid salt form plating solution compared with phosphite-type plating solution
Phosphorus electroplated layer has better brightness, faster plating speed and higher coating hardness.
Step 5: in six, seven ultra-wide stainless steel materials plating before using mild adding set respectively to pre-plating solution,
Appropriate amount of addition agent is added in order in nickel-phosphorus alloy amendment plating solution and common plating solution, and auxiliary agent includes catalyst, surfactant, organic
Sour promotor and rare earth addition, the effect of catalyst are ultra-wide stainless steel materials in the plating process in Surface Creation coating
Catalytic action is played in displacement reaction；The effect of surfactant is to reduce the porosity of coating；The effect of organic acid promotor is
Temperature needed for reducing reaction, increases coating deposition rate；The effect of rare earth addition is the number of active sites for increasing catalytic surface
Mesh reduces plating layer porosity, the specific complexing agent formation bridge ligand in rare earth and plating solution, during quickening redox reaction
The transmission speed of electronics increases coating deposition rate.
Referring to Fig. 3, mild adding set includes electroplating bath 1 and premix case 5,1 left and right ends of electroplating bath are fixedly connected with
There is extension platform 2, premix and be equipped with protection board 4 on the upside of case 5, is fixedly connected to column 3 between protection board 4 and a pair of of extension platform 2, in advance
Mixed 5 upper end of case is communicated with adding tube 6, and adding tube 6 through protection board 4 and extends to 4 upside of protection board, and premix 5 lower end of case is solid
Surely more equally distributed shunting injecting pipes 10 are connected with, shunts and solenoid valve 11 is installed on injecting pipe 10, a column 3 is mutually
It is fixedly installed with electronic slide unit 9 close to one end, is fixedly connected between the sliding end and premix 5 side wall of case of electronic slide unit 9, it is electronic
Slide unit 9 provides the premix driving force that case 5 is gone up and down, and shunting to dig on injecting pipe 10 has multiple equally distributed superfine liquid drain holes, pole
On the one hand the effect of thin liquid drain hole is uniform divided flows auxiliary agent, on the other hand can be in primary filtration auxiliary agent especially rare earth addition
Undissolved rare earth premixes and is equipped with activated charcoal strainer 12 on the downside of case 5, and activated charcoal strainer 12 and more shunting injecting pipes 10
Between be fixedly connected with, activated charcoal strainer 12 auxiliary agent addition complete and mixed stability after, under the driving of electronic slide unit 9 on
Rise while concede plating space, filter and take away undissolved rare earth and impurity in plating solution by the way, can mildly equably to
Plating solution in electroplating bath 1 adds auxiliary agent, especially rare earth addition, and the solubility of rare earth addition is smaller, and part is not completely molten
The rare earth addition of solution is added to the coating formed in plating solution it is possible that burr, reduces the homogeneity of coating surface, activity
The effect of charcoal filter screen 12 can go out and collect away to rare earth undissolved in plating solution and contaminant filter before plating, premix case
A pair of of heating wire 7 is installed, and a pair of of heating wire 7 is electrically connected with the same external power supply, is premixed and is also installed in case 5 in 5
There is ultrasonic wave stirring rod 8, the auxiliary agent in premix case 5 can be preheated and is stirred.
Traditional auxiliary agent addition manner compares " violence ", manually launches mostly into electroplating bath, and auxiliary agent especially rare earth adds
Adding agent, on the one hand dissolution is not enough in launch process, and on the other hand mixing is not uniform enough, and there are undissolved dilute in plating solution
Soil and impurity are easy to appear the poor problem of burr, homogeneity at the coating surface of model, mild adding set when in use,
By launching auxiliary agent into adding tube 6, under the heating of heating wire 7 and the ultrasonic agitation effect of ultrasonic wave stirring rod 8, promote to help
The uniform mixing of agent stands and stablizes for a period of time to auxiliary agent to not after solid is precipitated, and a pair of electronic driving of slide unit 9 of starting premixes
Case 5 drops to activated charcoal strainer 12 and reaches plating solution bottom side, and it is superfine on injecting pipe 10 via shunting to open 11 auxiliary agent of solenoid valve
In fluid apertures after primary filtration, start a pair of electronic slide unit 9 after same standing a period of time is mildly equably mixed with plating solution
Driving premix case 5 rises, and activated charcoal strainer 12 carries out primary filtering eventually to plating solution during leaving plating solution, including a small amount of
The minute quantity rare earth and original a small amount of impurity being precipitated in mixed process improve filter effect, keep the pure property of plating solution, please join
Fig. 4 is read, when the content of rare earth addition is 4mg/L, the porosity of coating is minimum.
The present invention may be implemented to increase nickel-phosphorus alloy technique between preplating and the general nickel coating of plating, while by plating solution
Mild uniform addition catalyst, surfactant, organic acid promotor and rare earth addition, can not only increase the heavy of coating
Product speed, can also significantly improve nickel coating lattice, refine close structure lattice, the porosity of coating is reduced, to guarantee general
The homogeneity and glossiness of nickel layer appearance, improve plated layer compact degree, uniformity and binding force, and corrosion resistance improves.
The foregoing is intended to be a preferred embodiment of the present invention；But scope of protection of the present invention is not limited thereto.
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
It improves design and is subject to equivalent substitution or change, should be covered by the scope of protection of the present invention.
Claims (10)
1. ultra-wide stainless steel materials nickel plating appearance optimization technique, it is characterised in that: the following steps are included:
Degreasing: step 1 carries out pre-cathode degreasing and cathode ungrease treatment to ultra-wide stainless steel materials；
Step 2, hot water embathe: carrying out embathing processing to the ultra-wide stainless steel materials after degreasing using 50 DEG C of tap water；
Step 3, sulfuric acid are washed: it is living to carry out anode to ultra-wide stainless steel materials using the sulfuric acid solution of 5-10 Baume degrees at room temperature
Change；
Step 4, pure water hydro-peening；
Step 5, pre- nickel: under conditions of temperature 50 C, current density 3-5ASD, using the pre-plating solution of 25-35 Baume degrees to super
Wide stainless steel materials are electroplated；
Step 6 corrects nickel: under conditions of 65-75 DEG C of temperature, current density 2-5ASD, utilizing the nickel phosphorus of 25-35 Baume degrees
Ultra-wide stainless steel materials are electroplated in alloy amendment plating solution；
Step 7: general nickel: under conditions of 50-60 DEG C of temperature, current density 2-5ASD, the common plating of 25-35 Baume degrees is utilized
Ultra-wide stainless steel materials are electroplated in liquid；
Step 8, cleaning are embathed: after the completion of the plating of ultra-wide stainless steel materials, at room temperature using the pure water of 10 grams per liters to super
Wide stainless steel materials are embathed；
Post-processing: step 9 utilizes 50 DEG C, the pure water ultra-wide stainless steel materials of 60 grams per liters after passivation；
Ultrasonic cleaning: step 10 carries out ultrasonic wave shake to ultra-wide stainless steel materials using pure water under conditions of temperature 50 C
Dynamic washing；
Drying: step 11 carries out ultra-wide stainless steel materials using the oil-free air blower of Lu Shi air-dried；
Step 12, drying: 100-150 DEG C of drying temperature, drying time 10s or more；
Step 13 assists rewinding.
2. ultra-wide stainless steel materials nickel plating appearance optimization technique according to claim 1, it is characterised in that: the nickel phosphorus closes
Gold amendment plating solution includes nickel sulfate, nickel chloride, sodium hypophosphite, boric acid and sodium fluoride, and nickel-phosphorus alloy corrects the pH value of plating solution
For 2.0-2.8.
3. ultra-wide stainless steel materials nickel plating appearance optimization technique according to claim 2, it is characterised in that: the nickel sulfate
Concentration is 240g/L, and the chlorination nickel concentration is 45g/L, and the ortho phosphorous acid na concn is 60g/L, and the boric acid concentration is
35g/L, the concentration of sodium fluoride are 30g/L.
4. ultra-wide stainless steel materials nickel plating appearance optimization technique according to claim 1, it is characterised in that: the step
Five, it is corrected respectively to pre-plating solution, nickel-phosphorus alloy using mild adding set before the plating of ultra-wide stainless steel materials in six, seven
Appropriate amount of addition agent is added in order in plating solution and common plating solution.
5. ultra-wide stainless steel materials nickel plating appearance optimization technique according to claim 4, it is characterised in that: the auxiliary agent packet
Include catalyst, surfactant, organic acid promotor and rare earth addition.
6. ultra-wide stainless steel materials nickel plating appearance optimization technique according to claim 4, it is characterised in that: described mildly to add
Feeder apparatus includes electroplating bath (1) and premix case (5), and electroplating bath (1) left and right ends are fixedly connected to extension platform (2), institute
It states and is equipped with protection board (4) on the upside of premix case (5), be fixedly connected to column between the protection board (4) and a pair of of extension platform (2)
(3), premix case (5) upper end is communicated with adding tube (6), and adding tube (6) through protection board (4) and extends to protection board
(4) upside, premix case (5) lower end is fixedly connected with more equally distributed shunting injecting pipes (10), the shunting injecting
It being equipped with solenoid valve (11) on pipe (10), a pair of column (3) one end close to each other is fixedly installed with electronic slide unit (9),
It is fixedly connected between the sliding end of the electronic slide unit (9) and premix case (5) side wall, digging on the shunting injecting pipe (10) has
Multiple equally distributed superfine liquid drain holes, premix case (5) downside is equipped with activated charcoal strainer (12), and activated charcoal strainer
(12) it is fixedly connected between more shunting injecting pipes (10).
7. ultra-wide stainless steel materials nickel plating appearance optimization technique according to claim 6, it is characterised in that: the premix case
(5) it is equipped with a pair of of heating wire (7) in, and a pair of of heating wire (7) is electrically connected with the same external power supply, the premix case
(5) ultrasonic wave stirring rod (8) are also equipped in.
8. ultra-wide stainless steel materials nickel plating appearance optimization technique according to claim 1, it is characterised in that: the step 1
Middle pre-cathode degreasing and cathode degreasing used under conditions of 50-60 DEG C of temperature, current density 5-10ASD weight percent for
The metal degreasing agent of 5-10%.
9. ultra-wide stainless steel materials nickel plating appearance optimization technique according to claim 1, it is characterised in that: the step 9
In be passivated under conditions of 40 DEG C of temperature, pH value 8-9, the solution composition of passivation is potassium bichromate 12-15g/L, sodium hydroxide
2.5-3.0g/L, sodium carbonate 1.5-2.5g/L, and passivation time is 3-10min.
10. ultra-wide stainless steel materials nickel plating appearance optimization technique according to claim 1, it is characterised in that: the step
It is washed after being passivated in nine using multi-stage countercurrent, the mode of vibration of ultrasonic wave is side vibration in the step 10.
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| CN111945161A (en) * | 2020-07-31 | 2020-11-17 | 深圳市润安科技发展有限公司 | Method for enhancing nickel coating binding force of anti-tension and anti-folding component in wrist strap |
| CN112176367A (en) * | 2020-09-03 | 2021-01-05 | 常熟市谢桥台板有限责任公司 | Anticorrosion electroplating process for constructional engineering machinery |
| CN112760686A (en) * | 2020-12-24 | 2021-05-07 | 江门市瑞期精细化学工程有限公司 | Cathode electrolysis activating solution, preparation method and application thereof |
| CN113186573A (en) * | 2021-04-30 | 2021-07-30 | 东莞市环侨金属制品有限公司 | Manufacturing process of electroplated communication terminal |
| CN113279032A (en) * | 2021-04-30 | 2021-08-20 | 东莞市环侨金属制品有限公司 | Continuous electroplating process for metal product |
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