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Three kind of water-soluble additives, 3-(N, N- dialkyl dithiocarbamate-y1) propionicacid, were synthesized. Their tribological performances when added to water were evaluated on afour-ball tester and a ring-on-block machine. Results indicate that the hydrocarbon chain length ofthese compounds has significant influence on their tribological properties. When the number ofcarbon atom in alkyl group is equal to (or more than) 4, the compounds exhibit excellentload-carrying capacity, antiwear property and weld load. The antiwear action mechanisms of thepropionic acid compounds can be ascribed to the formation of adsorption film and chemical reac-tion film. The cooperation action of these films plays an important role in the prevention of tri-bological failure.
Three tribological properties of water-soluble additives, 3- (N, N-dialkyl dithiocarbamate-y1) propionic acid, were synthesized. Their tribological performances when added to water were evaluated on afour-ball tester and a ring-on-block machine. that the hydrocarbon chain length of these compounds have significant influence on their tribological properties. When the number ofcarbon atoms in alkyl group is equal to (or more than) 4, the compounds exhibit excellentload-carrying capacity, antiwear property and weld load. The antiwear action mechanisms of thepropionic acid compounds can be ascribed to the formation of adsorption film and chemical reac- tion film. The cooperation action of these films plays an important role in the prevention of tri-bological failure.