Show i rare metal gives bearings lon longer loner er life new york indium a few years ago a chemical curiosity extracted with great difficulty from rare minerals is now a full fledged indus trial arial metal with an ever expanding use as an alloying agent tor for bearing metals motor bearings resisting millions of revolutions during the life of a car are now being made even tougher C F smart general motors engineer reported to the american institute of mining and metallurgical lurg ical engineers here by plating the bearing surface with indium this surface coating makes the bearing metal resistant to corrosion by the acid oils now in common use injo in cars Ui r recently babbitt metal an alloy of tin antimony and copper was used tor for most high speed bear aings today bearings are lined with silver copper cadmium cadmium f nickel and cadmium zinc alloys which are later electroplated electro plated with T indium increasing their resistance to oil corrosion |