|Type of plating||Features (characteristic value)|
|Indium plating||- Excels in lubricity because it is softer than lead plating.
- Has good alkali resistance though it is sensitive to inorganic acids.
- Improves glass-metal bonding force due to high conformability to glass.
|Indium alloy plating||- The melting point of 52 indium-48 tin alloy is 117°C, while that of tin is 232°C.
- Indium-tin alloy plating or indium-lead alloy plating is obtained by heat treatment after indium plating on tin or lead by using the low melting point.