Improving anti-rust property of EP industrial gear oil

When replacing a complex component formulation of the company's premium industrial EP gear oils, a suitable additive pack was selected based on extended EP and other tests, and critical applications were identified. To satisfy the most critical application, a number of laboratory tests were done, using various combinations of additives, followed by a field trial. This paper describes some of these laboratory tests, e.g. rust tests. The final product was tried and accepted by the customer replacing the old well-proven formulation.