POCKET BOOK_Final_Turned - Pall Corporation

Types of ContaminationSilicaHard, translucent particles often associated with atmosphericand environmental contamination, e.g., sand, dust.Bright MetalShiny metallic particles, usually silver or gold in colour,generated within the system. Generated contaminants areproducts of wear and often cause additional component wearand accelerated fluid breakdown.Black MetalOxidized ferrous metal inherent in most hydraulic andlubricating systems; built-in contaminant and genereatedwithin the system by wear.RustDull orange/brown particles often seen in oil from systemswhere water may be present, e.g., oil storage tanks.FibersContaminants most commonly generated from paper andfabrics, e.g., shop rags.Cake of FinesVery large concentrations of ‘silt’-size particles coat the analysismembrane and build-up into a cake. The cake obscures thelarger particles on the membrane making contaminationevaluation impossible.Magnification: 100xScale: 1 Division = 10 µm9