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Mathematic relationships in electroplating?

Q. I need some mathematical formulas about electroplating, such as the relationship between mass of plating material and the coating on the object to be plated. ASAP!

Thanks,

Pamela Krajewski
- Rhode Island
2001

A. Hi Pamela,

The relationship you gave as an example is the density of a metal, Pamela, its weight divided by its volume. Gold and lead are very dense; magnesium and aluminum are much less dense.

Something more unique to electroplating and much more interesting is expressed by Faraday's Law of Electrolysis: one Faraday of electricity (96,485 coulombs or Amp-seconds) will deposit one gram equivalent weight of metal. You didn't say what grade you were in, so I don't know if you know what a gram equivalent weight is yet though. But study it; it's the most important mathematical relationship in electroplating, and maybe in all of chemistry.

Good luck.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

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