Bench test method for rating the corrosion inhibiting ability of an oleaginous fluid

摘要

A bench-test method which correlates well with other more costly engine test methods, and which can be used to screen oleaginous formulation prior to performing expensive engine tests. The method comprises a) contacting ball bearing(s) having a smooth surface area with an oleaginous fluid to be screened; b) treating the oleaginous fluid during contacting with corrosive vapor for a period of time and at a temperature sufficient to form a metal oxide coating on the ball bearing(s) surface; and c) visually rating the metal oxide coating on the ball bearings.