Free Water

Water in oil is an almost invisible contaminant with dramatic effects on system efficiency. Water can be seen in some oil samples since it collates at the bottom of the sample glass or reduces the oil’s translucency. Small volumes of water can only be detected by analysis.

Water reduces oil’s ability to lubricate, which leads to higher operating temperatures, more oxidation and the generation of oxidation by-products such as resin and varnish. Together with particles, oxidation by-products are responsible for micro-pitting on component surfaces.

Another well-known effect of water in oil is corrosion. If water in oil is not removed effectively, equipment lifetime is quickly reduced.