Chrome, nickel, zinc, copper, silver and gold plating comparison
| Type | Hardness | Corrosion Resistance | Cost | Common Uses |
|---|---|---|---|---|
| Hard Chrome | HRC 65-70 | Good | $$ | Hydraulic rods, molds, shafts |
| Electroless Nickel | HRC 48-55 | Excellent | $$$ | Electronics, chemical equipment |
| Zinc | Soft | Good (with passivation) | $ | Fasteners, hardware, brackets |
| Copper | Soft | Poor | $$ | Underplate, electronics, decorative |
| Silver | Soft | Moderate (tarnishes) | $$$$ | Connectors, RF shielding |
| Gold | Soft | Excellent | $$$$$ | PCB contacts, connectors |