TECHNICAL OVERVIEW
FT-IR
1, 10, 20, 30 : number of friction tests
The coating durability is excellent because there is little change in the FT-IR graph during 1 to 30 times of the friction test for products coated with HA Coatings .
There is little change in FT-IR graph during 1 to 20 times of friction test for products coated with PVP coatings, so the coating durability is good.
1, 10, 20, 30 : number of friction tests