Some kinetic aspects of extreme pressure lubrication
1986; Elsevier BV; Volume: 108; Issue: 2 Linguagem: Inglês
10.1016/0043-1648(86)90096-7
ISSN1873-2577
AutoresAndrew W. Batchelor, Gwidon Stachowiak,
Tópico(s)Lubricants and Their Additives
ResumoA theory explaining extreme pressure (EP) lubrication in terms of a short-lifetime surface film was studied. Models to explain the lubricating ability of oxygen, sulphur and sulphur compounds were devised. In the case of oxygen, diffusion within the oil is thought to be a limiting factor. However, for sulphur, its solubility is very high in oil so that diffusion within the oil is not thought to be a problem. From recent experimental results described elsewhere, the superiority of elemental sulphur over oxygen in EP lubrication can be explained by its faster reaction rates with steel. With sulphur compounds it was found by experiment that the sulphide film growth rate is slow and a different model is needed. It is also concluded that EP lubrication films are much thinner than is commonly supposed.
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