Category Archives: Data Interpretation

Sources of Vanadium Vanadium is another wear metal commonly found alloyed with other metals. Vanadium may also be found in the coating of parts like valves, rods, rings, and bearings. Typically, increasing levels of vanadium, and possibly chromium, disproportional with iron, indicate coating wear, whereas proportional increases suggest hard steel alloy wear. One form of…

Sources of Aluminum While lead is commonly thought to be wear metal, that is not always the case. One example would be an oil sample from an aluminum block engine compared to a steel block engine. The block itself may be a source of wear metals when the sleeves for the pistons are machined directly…

Sources of Lead Lead is an expected wear metal in any machine using plain bearings, as lead and tin are the most predominant metals used in Babbitt overlay, with lesser amounts of copper, antimony, and/or arsenic. Typically, increasing levels of lead from this layer are not considered actionable, not until metals like copper or nickel…

Sources of Barium Barium was a detergent additive metal found in natural gas engine oils but is no longer allowed in products manufactured in North America due to toxicity concerns Greases, though, continue to use barium in the form of a thickener system. Machines with greased seals or those having undergone recent maintenance may exhibit…

Introduction to Elemental Spectroscopy Elemental spectroscopy measures in-service fluid samples for wear metals, additives, and contaminants. The method used to perform the measurement is properly termed Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) and the results are commonly referred to as ICP or spec results. The measurement is performed by diluting a sample with solvent…