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topic 10259

Some basic questions about electroplating


 

Q. HELLO,

PLEASE REPLY ME THE FOLLOWING ANSWERS AS SOON AS POSSIBLE WITH DESCRIPTIVE EXPLANATIONS.

1. WHAT SHOULD BE THE MATERIAL OF THE ELECTROPLATING / ELECTRODEPOSITION TANK ?

2. WHAT SHOULD BE THE CAPACITY OF TRANSFORMER IN AMPERES AND VOLTS?

3. WHAT SHOULD BE THE TEMPERATURE OF ELECTROLYTE SOLUTION IN DEGREE FAHRENHEIT AS PER MATERIAL (CHROME, COPPER, STAINLESS STEEL)?

THANKS,

ZUBAIR SHAFIQUE
- PAKISTAN


 

A. To get better answers please can you give more information as to the processes being used.

Also the size of parts will affect the number of amps:

Example: gold plating in our lab uses 1-2V and 2-3 A for tiny electrical pins;

Hard anodising uses up about 70V and 900A for a large casting from a boat engine.

Martin Trigg-Hogarth
Martin Trigg-Hogarth
surface treatment shop - Stroud, Glos, England


 

A. Zubair,

Re. the tank: before you can even consider what material to use you HAVE to know WHAT the chemistry is and the max. operating temperature. Then another consideration is the tank size. Unless you do that, no one can advise anything, can they?

You seem to be new at the game. Have you read any books on the subject and gone through some of the finishing. com library data? I suggest you do that first, eh?

freeman newton portrait
Freeman Newton
White Rock, British Columbia, Canada

(It is our sad duty to
advise that Freeman passed away
April 21, 2012. R.I.P. old friend).



 

A. Based on the information you provided, here is the best answer I can give you:
1. That depends upon the bath.
2. That depends upon the bath.
3. That depends upon the bath.

James Totter
James Totter, CEF
- Tallahassee, Florida


 

A. Hi cousin Zubair,

You'll probably have to view some electroplating texts, as you probably can't get enough data on such general issues by posting questions on a website (books tend towards say 300 pages on the subject and internet responses tend towards 1/4 page, so even a very long and protracted back-and-forth won't get you 1% of the way there.

Stainless steel cannot be electrodeposited. Chrome can be (usually from a hexavalent chromic acid bath) and is usually operated at between 110 °F and 140 °F. There are at least 3 major approaches to copper plating: acid copper, cyanide copper, and pyrophosphate copper. They run at different temperatures, voltage, and amperage.

If this is a student exercise, please give us a hypothetical part you'd like to imagine plating, and we can start making some progress with you. Good luck.

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


 

A. Get a hold of some electro-plating material. I recommend Kushner Electro-Plating School for you.

Regards,

Joel Garcia
- McAllen, Texas


 

thumbs up signGuys,

I think all of you are beginning to enjoy your work too much! Spare the poor kid!

Khozem Vahaanwala
Khozem Vahaanwala
Saify Ind supporting advertiser
Bangalore, Karnataka, India

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November 7, 2016

Q. Can one reverse gold plating by just reversing the polarity?

J Terrill
- Anchorage, Alaska USA


November 2016

A. Hi J. Yes.

Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey
Striving to live "Aloha"



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