Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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List of electrolyte used for plating
2005
Q. Sir
I would like to know list of electrolytes used for plating below metals.
Gold, silver, Tin, lead, chromium, Nickel, platinum,rhodium
Also I would like to know which are the electrolytes are banned under RoHS compliance,
I request you give the details.
regards
Palani
technology solution lab Pvt Lt - India
A. Multiple electrolytes are used for all those metals, and even within a generic type of electrolyte there are countless variations. It would take a book to answer that question, and N.V. Parthasaradhy's "Practical Electroplating Handbook" is a great one for that purpose.
Electrolytes are not banned, and in most cases the electrolyte does not persist in the final coating. The banned materials are lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE, which probably rules lead off your list. But sometimes a plating material or a topcoat can have offensive amounts of one of those materials and must be reformulated, so you must specify RoHS-compliant processing. There may be exemptions for some of your products.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2005
Q. Dear Sir
I would like to know plating of plastics.
What are the plastics can be plated, what is the process of plating plastics.
Also I would like to know difference between electroplating and electroless plating.
What is the process of electroless plating?
technology solution lab Pvt Lt - Bangalore, India
2005
A. ABS is the most commonly plated plastic, although several other types can be plated. "Standards and Guidelines for Electroplated Plastics" will give you a thorough introduction to plating of plastics. Electroless plating does not require electricity, the plating is autocatalytic; it starts on a seeded layer of catalytic material, then continues plating upon itself. Good luck.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2005
Q. The electrolyte used in silver plating is potassium argentocyanide or silver nitrate or Tollen's reagent or a mixture of NaNO3 and KMnO4?
Maryam Memon- Pune, Maharashtra, India
January 19, 2013
A. Hi, Maryam. At least 90% of all silver electroplating, and maybe 99%, has always been done from potassium argentocyanide and continues to be. Good luck.
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
January 25, 2013
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