Evaluation of Oxidation Stability for Diesel Engine Oil by Hot-Tube Oxidation Test

Hot-Tube Oxidation Test에 의한 디젤엔진오일의 산화안정성 평가

  • 정근우 (한국화학연구소 응용화학사업단) ;
  • 조원오 (한국화학연구소 응용화학사업단) ;
  • 김영운 (한국화학연구소 응용화학사업단) ;
  • 서인옥 (한국화학연구소 응용화학사업단) ;
  • 임수진 (한국화학연구소 응용화학사업단)
  • Published : 1998.10.01


This paper describes evaluation of oxidation stability for diesel engine oils by Hot-tube oxidation tester at high temperature. Evaluation was rated by visual inspection of lacquer in capillary glass tube and TAN determination of used oil. Air, NO$_2$-air and SO$_2$-air mixed gases were used as oxidizing gas. One oil which has low oxidation stability is selected and reformulated by addition of some additives such as antioxidant, detergent and disperant to improve oxidation stability. As a results of reformulation, antioxidant and detergent was effective for improvement of high temperture oxidation stability on diesel engine oil.