APPLICATIONS OF RADIOISOTOPES TO MEASUREMENTS OF PISTON RING WEAR AND EVALUATIONS OF ENGINE OILS I. EXPERIMENTS WITH COBALT-60 II. LITERATURE SURVEY

摘要

Tracer measurements of the rate of wear of piston rings were made with pile-activated iron rings, with iron rings inlaid with an electrolytically deposited alloy of nickel and radiocobalt, and with pile-activated nickel-inlaid rings. The tests were conducted with three types of engine oil in a single cylinder engine. The concentration of radio¬active debris transferred to the lubricant was monitored continuously with a scintillation detector. It was found that the three rings ranked the three oils similarly with respect to ring wear. The applicability of such rate of wear measurements to the evaluation of engine oils is discussed critically, with the conclusion that piston ring wear reduction is but one of many important aspects of engine lubrication. The subject of friction, wear, and lubrication is reviewed, with exhaustive coverage of the pub¬lished literature.