It is a fact of life that all metals corrode under the presence of common environmental conditions. The only exception to the rule is precious metals, such as silver and gold. The high-value of metal largely defines characteristics, but precious metals also are known for their stability. Metals are often placed on scales, where one end is noble metals, and the other side is active metals. An active metal will interact more with its environment than a noble metal because they are more stable. For instance, metals placed on the noble side of the scale are more resistant to interactions with other chemicals, making them corrosion-resistant.
To prevent corrosion of active metals, engineers and designers use plated wires with noble metals. Although several methods of preventing and slowing corrosion exist, metal plating is one of your best options for stopping corrosion. It is important to recognize that different noble metals behave differently when plated, so you must choose the right coating material.
GOLD – this material is electrically and thermally conductive, and it is also highly stable when used as a corrosion-resistant coating.
SILVER – this metal offers superior electrothermal conductivity, and so it is often found in automotive applications and generating electricity.
PLATINUM – this material has a high melting point while also being thermally stable. Use platinum in high-temperature applications. For instance, platinum-plated wires are found in the aerospace industry.
Other Common Coating Materials Include:
It would help if you considered all your options when approaching a new project. Using the right precious metal can save time and money for important projects.