FRICTION AND WEAR PROPERTIES OF FILM FORMED IN THE IMMERSION TEST OF OIL CONTAINING THE COMPLEX OF LANTHANIDE DIETHYLDITHIOCARBAMATE AND PHENANTHROLINE

Oil immersion tests of steel blocks in liquid paraffin containing a co mplex of lanthanide diethyldithiocarbamate and phenanthroline were car ried out ata various temperatures for two test durations. The friction tester. The chemical composition and chemical state of the protective films forme during this immersion were investigated using Xray photoe lectron spectroscopy (XPS) and Auger electron spectroscopy (AES). The results of the friction and wear tests indicated that the protective f ilms exhibited good antiwear and reduction friction properties. It was also found that the higher immersion temperature and longer immersion duration correspond to the longer the antiwear lifetime of the protec tive film. The results of the XPS and AES analyses indicate that the f ilm formed during the oil immersion tests might contain lanthanum oxid e, sulfide and organic nitrogen compounds. (C) 1998 Elsevier Science S .A. All rights reserved.