CATALYTIC EFFECT OF METALS: on oxidation of lubricating oils

The Aluminium Company of America have recently investigated the catalytic effect of several metals on the oxidation of lubricating oils and have found that aluminium alloys and stainless steel have only a very slight or no effect in contrast with copper and low‐carbon steel which very definitely have an adverse effect. These facts were given by D. W. Sawyer, one of their Research Chemists, in a paper read before the Petroleum Division of the American Society of Mechanical Engineers at Toronto, in June.