Gas Phase Lubrication (GPL) is used here to lubricate counterparts of a tribological system with a partial pressure of a gas. Because the rheological contribution (Hydrodynamic and EHL) of gas is practically negligible. the role of tribochemical reactions is of prime importance to achieve a good performance. Different sites of the contact zone are subjected to chemical reactions: insi... https://www.parisnaturalfoodes.shop/product-category/maca/