(TAN) Total Acid Number
Total Acid Number is an analytical test to determine the deterioration of lubricants. The more acidic a lubricant is, the further its degradation has proceeded. As oils or hydraulic fluids breakdown, they generally form acidic byproducts that can be corrosive to metal components, accelerate wear, form deposits and increase viscosity. As a fluid degrades, the levels of corrosive acids increase along with the danger of component failure.
Some fluids are already acidic in their formulation; therefore, the most effective means to measure for acidity is in its change compared to a new fluid or to the previous sample.
Applicable Spectro Products: