Nickel plating solution
Technical field
The present invention relates to a kind of nickel plating solution.
Background technology
Present Zinc alloy electroplating nickel typically all first carries out cyanide copper plating bottoming, then re-plating nickel and other coating.
There is shortcoming in cyanide copper plating bottoming;
1. hypertoxic (cyanide belongs to the raw material that country prohibits the use of).
2. 50-60 DEG C of operating temperature during copper facing, works smell greatly, bad environments.
3., because two kinds of metal current potentials of zinc and nickel differ greatly, nickel plating solution is very sensitive always to zinc pollution, somewhat there is one
Point zinc ion is present, and just easily causes nickel plating to black.Zn content increases up to more than 0.02g/L coating stress, and fragility simultaneously black occurs
Striped, or even coating blacks comprehensively.The enough thickness of nickel plating requirement cyanide electroplating layer, densification are so that product is subsequently arrived after kirsite copper facing
Nickel cylinder does not black.Neutral nickel is strict not as sour nickel is plated to bottoming cyanide electroplating consistency and thickness requirement.But, electroplate boundary
Current cyanide electroplating level limitation, cyanide electroplating layers of copper brightness is not fine, and degree of filling and leading up and brightness all hardly possiblies reach in the short time
To the effect of minute surface, typically 50-90 minutes are wanted, or even longer.And electroplating time is oversize, because copper unit price is high, cost is again
It is too high.Often brightness does not reach requirement to cause subsequently to electroplate neutral nickel, and the plating general color of neutral nickel is partially dark yellow, form and aspect
Unsightly.
And because cyanide has preferable activity, have good adhesion, particularly zinc alloy product with body, at present,
Plating circle still using it as bottoming coating first-selection, although neutral nickel does not have to bottoming cyanide electroplating consistency and thickness requirement
The sour nickel of plating is so strict, but can not be too careless, and not so neutral nickel can also black.
Zinc has preferable corrosion resisting property as a kind of cheap electrodeposition of metals, and zinc-plated electroplating technology compares into
It is ripe, it is easier to obtain and preferably walks and fill and lead up performance, than more serious, zinc plating can throw completely for current China's environmental pollution
Abandon the cyanide of severe toxicity.If zinc electrodeposited coating bottoming can be utilized, the bright property and the property filled and led up, Yi Jixin of zinc electrodeposited coating are made full use of
Coating so both may be used to the various material pre-treatments relatively simple feature of requirement, then one layer of nickel dam of Direct Electroplating in zinc layers
So that cost is greatly reduced, the quality of product is can guarantee that again.However, zinc differs greatly with nickel current potential, direct nickel plating is always on zinc
The problem that plating worker dream is solved.
The content of the invention
In view of this, the technical problems to be solved by the invention are:There is provided it is a kind of can on zinc the nickel plating of direct nickel plating it is molten
Liquid.
In order to achieve the above object, the present invention adopts the following technical scheme that to realize:
A kind of nickel plating solution, wherein, including nickel sulfate 90-150g/L;Sodium chloride 45-65g/L;Cobalt chloride 5-12g/L;Lemon
Lemon acid sodium 80-130g/L, neutral nickel brightener 0.5ml/L;Neutral nickel open cylinder agent 35ml/L, its preparation method is:To prepare one
As a example by liter plating solution;Add water 500ml, is heated up to 70 DEG C, adds sodium citrate 80-130g, is subsequently adding nickel sulfate 90-150g, chlorine
Change cobalt 5-12g, stir, be dissolved to clear, addition sodium chloride 45-65g, be dissolved to clearly, be subsequently adding the open cylinder agent 35ml,
Brightener 0.5ml, adds water to 1000ml, adjustment pH value to 6.5-7.0.
Preferably, also including adjuvant 0.5-1ml/L in the nickel plating solution.
Preferably, the open cylinder agent includes pps10g/L, lactic acid (CH3-CH (OH)-COOH) 150g/L, BSI45g/L,
Its preparation method is:First add water 500ml, adds each composition, after stirring and dissolving, add water to 1000ml according to quantity.
Preferably, the brightener comprising cobalt chloride 100g/L, lactic acid (CH3-CH (OH)-COOH) 20g/L,
Pps90g/L, BSI60g/L, butine ethanol 40g/L, its preparation method is:First added water 500ml, and each composition is added according to quantity, stirring
After dissolving, 1000ml is added water to.
Preferably, the adjuvant includes pps10g/L, BSI45g/L, ATP6g/L, its preparation method is:First add water
500ml, adds each composition, after stirring and dissolving, add water to 1000ml according to quantity.
Preferably, the nickel plating solution includes nickel sulfate 90g/L;Sodium chloride 50g/L;Cobalt chloride 10g/L;Citric acid
Sodium 80g/L, neutral nickel brightener 0.5ml/L;Neutral nickel open cylinder agent 35ml/L, its preparation method is:It is to prepare one liter of plating solution
Example;Add water 500ml, is heated up to 70 DEG C, adds sodium citrate 80g, is subsequently adding nickel sulfate 90g, cobalt chloride 10g, stirs,
Clear, addition sodium chloride 50g is dissolved to, is dissolved to clearly, be subsequently adding the open cylinder agent 35ml, brightener 0.5ml, added water to
1000ml, adjustment pH value to 6.5-7.0.
As shown from the above technical solution, the beneficial effects of the invention are as follows:
Compared to existing technology, nickel plating solution of the invention has the benefit that:
1. can Direct Electroplating on zinc, extension, barrel plating can, coating it is white it is bright, be adapted to P H6.5-7.0 plating solutions, additive is used
Amount is saved.
2. apparently very full low potentials are good as high potential light for coating.It is easily controlled, the anti-polygamy of plating solution can be good, plating
Liquid is limpid, unlike former neutral nickel solution is easily muddy.Stabilization, long processing period, or even at the scene, plating solution work one section when
Between after plating one layer of cadmia of bottom land all do not influence normal plating.Coating has been difficult spot.Coating is pure white, light.
3., for the problem that electroless nickel layer color is partially dark yellow, we have introduced another metallic cobalt, increased the cause of coating
Close property is good, and etch resistant properties are good, makes coating color pure whiter.After ironware electroplated product plating one hour of Potassium Chloride Zinc Plating, nickel plating
Salt mist experiment went out the white rust time more than 60 hours within 20 minutes.If rack plating hardware, its follow-up set chromium excellent performance.
4. Direct Electroplating nickel after bright galvanization coating, coating is pale, light, and particularly low area's performance is well now normal
Acidic nickel plating.
5. normal temperature plating, smell is few, and working environment is substantially improved.
6. cyanide-free, sewage disposal is simple, it is cost-effective substantially.
Specific embodiment
In order that those skilled in the art can be further understood that feature of the invention and technology contents, referring to following has
Close detailed description of the invention.
The invention provides a kind of nickel plating solution, wherein, including nickel sulfate 90-150g/L;Sodium chloride 45-65g/L;Chlorination
Cobalt 5-12g/L;Sodium citrate 80-130g/L, neutral nickel brightener 0.5ml/L;Neutral nickel open cylinder agent 35ml/L, its preparation method
For:As a example by preparing one liter of plating solution;Add water 500ml, is heated up to 70 DEG C, adds sodium citrate 80-130g, is subsequently adding nickel sulfate
90-150g, cobalt chloride 5-12g, stirs, and is dissolved to clear, addition sodium chloride 45-65g, is dissolved to clearly, is subsequently adding described
Open cylinder agent 35ml, brightener 0.5ml, add water to 1000ml, adjustment pH value to 6.5-7.0.Certainly, may be used also in the nickel plating solution
With comprising adjuvant 0.5-1ml/L.Each brightener can use following formula and preparation method, but without limitation, existing skill
Other common prescriptions and preparation method in art can also.The open cylinder agent comprising pps10g/L, lactic acid (CH3-CH (OH)-
COOH) 150g/L, BSI45g/L, its preparation method is:First add water 500ml, adds each composition, after stirring and dissolving, add water according to quantity
To 1000ml.The brightener includes cobalt chloride 100g/L, lactic acid (CH3-CH (OH)-COOH) 20g/L, pps90g/L,
BSI60g/L, butine ethanol 40g/L, its preparation method is:First added water 500ml, and each composition is added according to quantity, after stirring and dissolving, plus
Water is to 1000ml.The adjuvant includes pps10g/L, BSI45g/L, ATP6g/L, and its preparation method is:First add water
500ml, adds each composition, after stirring and dissolving, add water to 1000ml according to quantity.
1st embodiment:
The nickel plating solution includes nickel sulfate 90g/L;Sodium chloride 50g/L;Cobalt chloride 10g/L;Sodium citrate 80g/L,
Neutral nickel brightener 0.5ml/L;Neutral nickel open cylinder agent 35ml/L, its preparation method is:As a example by preparing one liter of plating solution;Add water
500ml, is heated up to 70 DEG C, adds sodium citrate 80g, is subsequently adding nickel sulfate 90g, cobalt chloride 10g, stirs, and is dissolved to
Clearly, sodium chloride 50g is added, is dissolved to clearly, be subsequently adding the open cylinder agent 35ml, brightener 0.5ml, add water to 1000ml, adjusted
Whole pH value is to 6.5-7.0.
2nd embodiment:
The nickel plating solution includes nickel sulfate 95g/L;Sodium chloride 46g/L;Cobalt chloride 6g/L;Sodium citrate 90g/L, in
Property nickel brightener 0.5ml/L;Neutral nickel open cylinder agent 35ml/L, its preparation method is:As a example by preparing one liter of plating solution;Add water
500ml, is heated up to 70 DEG C, adds sodium citrate 90g, is subsequently adding nickel sulfate 95g, cobalt chloride 6g, stirs, and is dissolved to
Clearly, sodium chloride 46g is added, is dissolved to clearly, be subsequently adding the open cylinder agent 35ml, brightener 0.5ml, add water to 1000ml, adjusted
Whole pH value is to 6.5-7.0.
3rd embodiment:
The nickel plating solution includes nickel sulfate 100g/L;Sodium chloride 48g/L;Cobalt chloride 8g/L;Sodium citrate 100g/L,
Neutral nickel brightener 0.5ml/L;Neutral nickel open cylinder agent 35ml/L, its preparation method is:As a example by preparing one liter of plating solution;Add water
500ml, is heated up to 70 DEG C, adds sodium citrate 100g, is subsequently adding nickel sulfate 100g, cobalt chloride 8g, stirs, and is dissolved to
Clearly, sodium chloride 48g is added, is dissolved to clearly, be subsequently adding the open cylinder agent 35ml, brightener 0.5ml, add water to 1000ml, adjusted
Whole pH value is to 6.5-7.0.
4th embodiment:
The nickel plating solution includes nickel sulfate 120g/L;Sodium chloride 55g/L;Cobalt chloride 11g/L;Sodium citrate 110g/
L, neutral nickel brightener 0.5ml/L;Neutral nickel open cylinder agent 35ml/L, its preparation method is:As a example by preparing one liter of plating solution;Add water
500ml, is heated up to 70 DEG C, adds sodium citrate 110g, is subsequently adding nickel sulfate 120g, cobalt chloride 11g, stirs, and dissolves
To clear, sodium chloride 55g is added, is dissolved to clearly, be subsequently adding the open cylinder agent 35ml, brightener 0.5ml, add water to 1000ml,
Adjust pH value to 6.5-7.0.
5th embodiment:
The nickel plating solution includes nickel sulfate 150g/L;Sodium chloride 60g/L;Cobalt chloride 12g/L;Sodium citrate 120g/
L, neutral nickel brightener 0.5ml/L;Neutral nickel open cylinder agent 35ml/L, its preparation method is:As a example by preparing one liter of plating solution;Add water
500ml, is heated up to 70 DEG C, adds sodium citrate 120g, is subsequently adding nickel sulfate 150g, cobalt chloride 12g, stirs, and dissolves
To clear, sodium chloride 60g is added, is dissolved to clearly, be subsequently adding the open cylinder agent 35ml, brightener 0.5ml, add water to 1000ml,
Adjust pH value to 6.5-7.0.
If the above-mentioned material purity for using not enough, will add activated carbon 2g, stir 1 hour, precipitate 12 hours so
After filter, adjustment pH value tries plating to 6.5 or so, then after being electrolysed.
Technological process;Iron material;Pre-treatment-zinc-plated-nitric acid light extraction-nickel plating-other operations.
Zinc alloy material;Pre-treatment-zinc-plated-nitric acid light extraction-other operations.
Aluminium alloy;Pre-treatment (secondary heavy zinc)-zinc-plated-nitric acid light extraction-nickel plating-other operations.
Plating solution control suggestion during production;
1. notice that nickel sulfate wants sodium citrate to be complexed addition when matching somebody with somebody groove.And it is properly added open cylinder agent.Plating solution control is advised;
Coating has mist when sodium citrate is too many, does not work.Complexing agent is on the high side or coating is partially black during PH too high.
2. Baume degrees should not adjust 13-15 too high.Too high cost increases, and stability and walks all bad.
3. when 15-25 DEG C of temperature of temperature is too high, easily there is stain to occur.The too low easy crystallization of temperature, makes composition unbalance.It is anti-
Only zinc pollution, it is proposed that nickel plating solution temperature control is at 20 DEG C or so.Refrigerator should be equipped with during plating production.
As long as 4. open cylinder agent is when cylinder and supply nickel sulfate is opened or the when of plating has stain situation or plating solution is muddy
When add, can usually add.Usually supplement brightener maintains coating light.Coating has certain light.Adjuvant has
Beneficial to walking and removal of impurities.
5. suggestion nickel sulfate content is slightly above sodium citrate.Notice that nickel sulfate wants sodium citrate to be complexed addition during with groove,
Usually addition matches somebody with somebody 1 bag sodium citrate by 1 bag nickel sulfate.1-2kg cobalt chlorides.And it is properly added open cylinder agent.Temperature should when relatively low
Kept for 20 DEG C or so, in case solution composition crystallization makes solution composition unbalance.
6. neutral nickel brightener consumption;150-250ml/kAh. neutral nickels open cylinder agent consumes 50-100ml/kAh adjuvants
50-100ml/kAh.
The technique has used some months in Ji Jia great factories production line, in practice it has proved that the process stabilizing, coating color
There is no much differences with Direct Electroplating nickel, corrosion resistance coating considerably beyond direct nickel plating, coating and plating solution is leaded, amine, cyanogen
The harmful substances such as compound, substantially, easily, electroplating work procedure is simple for sewage disposal, reduces cost of labor for plating work enhancement of environment.Often
Temperature is electroplated, significantly save energy.Material to being plated product is not strict with, and copper, iron, kirsite etc. can be directly electric
Plating.Al-alloy parts will could then be electroplated after secondary heavy zinc.Working of plastics wants electroless copper plating or heavy nickel, then zinc-plated.Before all
Treatment is easily controlled all according to zinc-plated conventional electroplating processes.Social benefit, environmental benefit, economic benefit are all quite obvious.
But preferable possible embodiments of the invention are the foregoing is only, and is not used to limit to the scope of the claims of the invention, therefore
The equivalent structure change that all utilization present specifications are made, similarly within the scope of the present invention.