On the Mechanism of Boundary Lubrication. II. Wear Prevention by Addition Agents

摘要: If two metal surfaces slide over each other in the presence of a lubricant and under high load, pressures temperatures prevail t those isolated spots which actually carry leading to wear possibly breakdown. The action preventing agents these conditions has been studied detail it found that such are effective through their chemical polishing action, by load becomes distributed larger surface local decreased. Especially compounds containing phosphorus or elements group V periodic system. These have form phosphide homolog on is able alloy with surface, lowering its melting point markedly, this aiding greatly maintaining polish. experiments were carried out highly sensitive accurate method uses metal-plated steel balls as sliding elements. Under experimental additions 1.5% triphenyl phosphine arsine white oil gave prevention factors 7.2 12.2 respectively (relative pure oil). A further addition 1% long chain polar compound double factor obtained 17.6 observed. specifically physical long-chain discussed preceding paper.