1. coating or treating (a surface or object) with platinum or a platinum compound
Usage: British spelling; American equivalent is 'platinizing'; technical/industrial context
2. converting into platinum or a platinum compound through chemical or industrial processes
Usage: chemistry/metallurgy context

Examples

• The jeweler is platinising the ring to give it a lustrous finish.
• Platinising the electrode improves its catalytic properties.
• The industrial process involves platinising steel components for durability.
• They are platinising the dental implant to enhance biocompatibility.
• The laboratory technician began platinising the sample for the experiment.