EFFECTS OF SYNTHETIC ADDITIVES ON THE FRICTION AND WEAR PROPERTIES OFA CR2O3 COATING

The effects of some new synthesized additives on the friction and wear properties of a Cr2O3 coating were studied using a block-on-ring test er under ambient conditions. The results indicate that, compared with base oil, BMDDP, BMDOC and BMDT have friction-reducing action, BMDDP i s effective in reducing wear but the others increase it. Test paramete rs such as load and sliding time have a great influence on the wear pr operties of the Cr2O3 coating but little influence on the friction pro perties. Scanning electron microscopy and X-ray photoelectron spectros copy analyses show that the wear-reducing action of BMDDP is a result of the adsorption of its decomposed products and the formation of trib ochemical reaction films on the rubbing surfaces, the wear-increasing actions of BMDOC and BMDT mainly result from their decomposed product H2SO4, leading to corrosive wear.