Page 35 - CFCM Nov-Dec-2020 Final_Neat

plating and anodizing: PRECIOUS METALS PLATING

Plating of

Precious Metals

BY PAUL FREDERICKS AND JEFF LOGAN

PRECIOUS METALS have been used for centuries now for GOLD
their corrosion-resistant properties and aesthetic. They have Gold is considered malleable, practically indestructible, and
become essential for the production of engineered systems completely recyclable, while also being virtually immune
and high-tech devices, especially in the communication to the effects of water, air and oxygen. This unique combi-
and electronic industry sectors. nation of properties makes it an essential component in
Precious metals also have widespread applications in many industrial, medical and electrical applications. Gold
the automotive and aerospace industries. These metals are is one of the most electrically conductive metals and is
rare and expensive but irreplaceable because of their prop- also an excellent conductor of heat or thermal energy.
erties, such as high positive electrode potentials, meaning Gold plating is useful for parts that need wear or corro-
they are relatively resistant to most aggressive environments. sion resistance while still maintaining their flexibility. It has
Due to their high cost, it is necessary to closely control the a high electrical conductivity, and it is non-reactive with
chemical processes in which they are used, such as chem- other elements. Although it is the most expensive option
ical surface treatment technology, to make the processes for electroplating, it’s by far the best method for securing
efficient and economically viable. the value and quality of your product.
The two most common types of precious metal plating Gold plating is often used in electronics in order to add
are gold and silver. a corrosion-resistant electrically conductive layer to copper,
usually in printed circuit boards and electrical connectors.

www.cfcm.ca CAnADIAn FInISHInG & COATInGS MAnuFACTuRInG 35