Effectiveness of Selected CHO Compounds as Antiwear Additives to White Mineral Oils

• Published in: Tribology transactions Vol. 48; no. 1; pp. 93 - 99
• Main Authors: Kajdas, C., Majzner, M.
• Format: Journal Article
• Language: English
• Published: Colchester Taylor & Francis Group 01.01.2005; Taylor & Francis; Taylor & Francis Inc
• Subjects: Antiwear Additives; Applied sciences; Chemical compounds; Effectiveness studies; Environmentally Friendly Lubricants; Exact sciences and technology; Friction, wear, lubrication; Lubricants & lubrication; Machine components; Mechanical engineering. Machine design; Mineral oils; Viscosity; White Oils; White oil; Lubricating oil; Viscosity; Environmentally Friendly Lubricants; Adhesive wear; Scuffing; Wear test; Mineral oil; White Oils; Boundary condition; Experimental study; Antiwear Additives; Synergism; High pressure; Lubricant; Ester; Antiwear additive; Lubricant additive; Four ball machine; Boundary lubrication; Ball on disk testing; Tribology
• ISSN: 1040-2004; 1547-397X
• DOI: 10.1080/05698190590901260

The objective of this article is to verify the effectiveness of CHO products (mixtures of esters) and their compositions with a lactam-type CHNO compound applied at the concentration ≤1 wt% as antiwear additives to white oils. The research was performed using a ball-on-disk tester and a special four-ball apparatus. The tested CHO and CHNO additives show very good antiwear properties under boundary lubrication conditions. They provide the highest wear reduction when they are introduced at 0.1 wt%. The wear reduction synergism for mixtures comprising 20 wt% of the CHNO compound and 80 wt% of the selected esters is not observed. Additionally, the limiting pressure of seizure, p s , was determined. It was found that p s is not improved by esters and the CHNO additive if they are added at 0.1 wt%; the positive influence of some mixtures comprising 20 wt% of the CHNO compound and 80 wt% of the chosen esters is revealed. It was also proved that the oil viscosity influences the tribological properties of applied additives under boundary lubrication and extreme pressure conditions.