BT-9 Navistar Humidity Corrosion Test
Mechanical and hydraulic systems often contain expensive and sensitive steel components that may corrode in the presence of atmospheric moisture, condensation or water contamination. Lubricants in these systems contain anti-corrosive additives to control this corrosion and protect metal components. This test evaluates the ability of a lubricant to protect steel components from corrosion in humid atmospheres.
Steel rods are prepared as per the method, dipped in the sample, suspended in a humidity saturated environment, removed and visually examined for corrosion. Reported is a pass if less than six corrosion spots per linear inch are observed, otherwise a fail is reported.