Influence of the moist air humidity (10-70%) on the fretting characteristics of steels under grease lubrication is experimentally investigated. Ball (bearing steel. JIS SUJ2) on disk (carbon steel. JIS S15C) type fretting tests for 0-20 mg of grease supplied before each test at the punctual contact between ball and disk were conducted at 50 μm slip amplitude and 6. https://parisnaturalfoodes.shop/product-category/enhanced-collagen-powder-with-matcha/