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Topic: electroless nickel plating  (Read 25131 times)

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Offline dionl

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electroless nickel plating
« on: March 27, 2008, 07:52:28 AM »
Hi, Can you help me about formula of electroless nickel plating, I am a student and also working in a company about plating chemicals. I am so new and I trying to search to learn...
thanks for now  ::)

Offline Arkcon

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Re: electroless nickel plating
« Reply #1 on: March 27, 2008, 08:48:54 AM »
The general concept is here:  http://en.wikipedia.org/wiki/Plated#Electroless_plating  You probably want more specific information than that, but you are not likely to get it.  Such information is proprietary, and the companies will not release it.  Yes, maybe if you browse the patent, you'll find more info, but even that is just as muddled as the article above.  Yes, the MSDS or the side of the bottle will list the chemicals used, and you might be able to piece it together.  But no one's going to spell it all out for you online.

Here's a game you can try, you say you work for a plating company, ask your boss and supervisors, how a plating bath works, tell them you want to know the specifics of your company's procedure, so that you can post it online to help others understand.  And tell us what they say.  I'm sure it'll be real interesting.
« Last Edit: March 27, 2008, 05:16:44 PM by Arkcon »
Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline kevins

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Re: electroless nickel plating
« Reply #2 on: March 31, 2008, 10:50:38 AM »
The composition of the bath:
Nickel sulphate, sodium hypo-phosphite and NH4OH.
Sorry I have no idea of the concentration. :(

Offline dionl

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Re: electroless nickel plating
« Reply #3 on: April 03, 2008, 03:15:43 AM »
The composition of the bath:
Nickel sulphate, sodium hypo-phosphite and NH4OH.
Sorry I have no idea of the concentration. :(
thank you, i will try and if it is successful i will give information here ;)

Offline dionl

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Re: electroless nickel plating
« Reply #4 on: April 15, 2008, 10:18:14 AM »
The composition of the bath:
Nickel sulphate, sodium hypo-phosphite and NH4OH.
Sorry I have no idea of the concentration. :(
I tried it but I think there is some missings, as stabiliser and conditioner in which a formula includes.
The formula is 2-4 gr /lt stabiliser
                    2-4 gr /lt conditioner
                    30-50 mg wetter and as you mentioned the three chemicals above there.
But the problem is that what is the stabiliser and conditioner and wetter. :-\

Offline dionl

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Re: electroless nickel plating
« Reply #5 on: April 15, 2008, 10:19:46 AM »
The composition of the bath:
Nickel sulphate, sodium hypo-phosphite and NH4OH.
Sorry I have no idea of the concentration. :(
I tried it but I think there is some missings, as stabiliser and conditioner in which a formula includes.
The formula is 2-4 gr /lt stabiliser
                    2-4 gr /lt conditioner
                    30-50 mg wetter and as you mentioned the three chemicals above there.
But the problem is that what is the stabiliser and conditioner and wetter. :-\
conditioner is like an accelerator. ;)

Offline eprigge

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Re: electroless nickel plating
« Reply #6 on: April 15, 2008, 06:23:51 PM »
Attached is a document with a few electroless nickel bath recipes.  See pages 2-3.  There are actually a wide variety of bath compositions as you can see.   You might also search Google patents for more info, #3148072 for example. 

The only additive that you may need is the stabilizer which keeps the nickel from spontaneously reducing.  Some baths need it, some you can get by without.

Offline dionl

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Re: electroless nickel plating
« Reply #7 on: April 17, 2008, 03:46:55 AM »
Attached is a document with a few electroless nickel bath recipes.  See pages 2-3.  There are actually a wide variety of bath compositions as you can see.   You might also search Google patents for more info, #3148072 for example. 

The only additive that you may need is the stabilizer which keeps the nickel from spontaneously reducing.  Some baths need it, some you can get by without.

Hi Eprigge, ::) I read the document which was very good. but I am confused about stabilizer, which of can I use Pb or thiourea? I am not sure because I will use abs ( plastic ) to plate with electroless nickel.

Offline dionl

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Re: electroless nickel plating
« Reply #8 on: April 29, 2008, 06:23:18 AM »
Attached is a document with a few electroless nickel bath recipes.  See pages 2-3.  There are actually a wide variety of bath compositions as you can see.   You might also search Google patents for more info, #3148072 for example. 

The only additive that you may need is the stabilizer which keeps the nickel from spontaneously reducing.  Some baths need it, some you can get by without.

can cadmium be used in a electroless nickel bath?

Offline reidsmith

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Re: electroless nickel plating
« Reply #9 on: January 25, 2009, 09:42:16 PM »
Does anyone have the file NickelCurrentsFall1999.pdf ?  please post it again if you do. The link here does not work.

Offline pil

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Re: electroless nickel plating
« Reply #10 on: February 25, 2009, 07:13:01 PM »
Hi,

My name is marius and I am looking from a long time for a nickel plating solution. I am making some fishing lures from copper and I realy need to to plate them with nickel and silver. I got a nickel plating solution from a friend, but it is not for electroplating , it applies with friction. Here is the solution.

30 parts nickel sulfate
10 parts ammonium sulfate
20 parts choline (not 100% sure , in romanian it is called "caolina" but it must be )
5 parts talc

And the recipe sais: that all the substances are mixed with some small amount of water until they become something like a pasta and then we ad some boric acid and you put the pasta with friction on the copper lure . Mabe you can try this recipe dionl and give us some results.

There is a guy on youtube who is plating nickel on some coins and he is using "distilled vinegar, pinch of salt, and electrically dissolved nickel" . Here is the link : http://www.youtube.com/watch?v=A0xFlIQ9MhQ&feature=related

I found in a patent some more recipes :

WORKING EXAMPLE 1
A nickel plating bath is prepared by combining the following components in the amounts listed.

 
 nickel sulfate hexahydrate  91  g/L 
 aminotrimethylene phosphonic acid  100  g/L 
 ascorbic acid  50  g/L 
 pH (buffered by NaOH)  5.0 
 


WORKING EXAMPLE 2
A nickel plating bath is prepared by combining the following components in the amounts listed.

 
 nickel sulfaminate tetrahydrate  140  g/L 
 aminotrimethylene phosphonic acid  50  g/L 
 ascorbic acid  50  g/L 
 pH (buffered by NaOH)  5.0 
 


WORKING EXAMPLE 3
A nickel plating bath is prepared by combining the following components in the amounts listed.

 
 nickel sulfate hexahydrate  91  g/L 
 aminodiacetic acid  50  g/L 
 ascorbic acid  20  g/L 
 pH (buffered by NaOH)  5.0 
 


WORKING EXAMPLE 4
A nickel plating bath is prepared by combining the following components in the amounts listed.

 
 nickel sulfate hexahydrate  91  g/L 
 aminotrimethylene phosphonic acid  100  g/L 
 ascorbic acid  50  g/L 
 pH (buffered by NaOH)  7.0 
 


WORKING EXAMPLE 5
A nickel plating bath is prepared by combining the following components in the amounts listed.

 
 nickel sulfate hexahydrate  91  g/L 
 aminotrimethylene phosphonic acid  100  g/L 
 ascorbic acid  50  g/L 
 boric acid  50  g/L 
 pH (buffered by NaOH)  7.0 
 


COMPARATIVE EXAMPLE 1
A nickel plating bath is prepared by combining the following components in the amounts listed.

 
 nickel sulfate hexahydrate  350  g/L 
 nickel chloride hexahydrate  45  g/L 
 boric acid  50  g/L 
 pH  4.2 
 


COMPARATIVE EXAMPLE 2
A nickel plating bath is prepared by combining the following components in the amounts listed.

 
 nickel sulfate hexahydrate  350  g/L 
 ascorbic acid  100  g/L 
 pH  9.0 
 


COMPARATIVE EXAMPLE 3
A nickel plating bath is prepared by combining the following components in the amounts listed.

 
 nickel sulfate hexahydrate  91  g/L 
 ascorbic acid  100  g/L 
 pH  5.0 
 


COMPARATIVE EXAMPLE 4
A nickel plating bath is prepared by combining the following components in the amounts listed.

 
 nickel sulfate hexahydrate  91  g/L 
 aminotrimethylene phosphonic acid  100  g/L 
 pH  5.0 
 


COMPARATIVE EXAMPLE 5
A nickel plating bath is prepared by combining the following components in the amounts listed.

 
 nickel sulfate hexahydrate  91  g/L 
 aminodiacetic acid  100  g/L 
 pH  5.0 
 


COMPARATIVE EXAMPLE 6
A nickel plating bath is prepared by combining the following components in the amounts listed.

 
 nickel sulfate hexahydrate  350  g/L 
 nickel chloride hexahydrate  45  g/L 
 boric acid  50  g/L 
 pH  6.0 

http://www.freepatentsonline.com/6852211.html  here is the patent

If you try this please replay with solutins. Thank you.

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