The presence of water in lubricatnt oil will destroy the oil film formed by the lubricating oil, making the lubrication effect worse. At the same time, it will accelerate the corrosion of organic acids on metals, rust equipment, and accelerate the oxidation failure of additives and the saponification reaction of oil products, making oil products prone to sediment. Here we introduce three ways for water to mix into oil:
First, it is leakage, that is, the equipment is not tightly sealed, or the condenser corrodes and leaks water into the oil. This is easy to understand and is also a common thing in daily life.
Second, it is brought in by the working medium, such as the water content in engine oil and compressor oil. Some of it is in its work, such as the combustion of oil products will produce carbon dioxide and some water. If the piston is not tightly sealed, some water will be brought into the oil.
Third, condensed water, this is also the phenomenon that is least noticed and hard to understand. For example, the temperature of the oil in the oil tank is 40 degrees. At this time, the water absorption saturation of the oil is 50PPM, but the temperature of the working part often needs to be 60 degrees or 70 degrees. At 70 degrees, the water absorption saturation of the oil is 300PPM. Then when returning from the working part to the oil tank, there will be a saturation difference. 300PM minus 50PPM equals 250PM of water. This water will precipitate from the oil when returning from the high temperature point to the low temperature point. Over time, it will accumulate on the wall or the bottom of the oil tank, and slowly emulsify the oil and cause some harm.
As long as there is contact with the air, the oil will absorb water. As long as there is a temperature difference, there will be precipitation of water. Therefore, it is not surprising to see water droplets on the relatively closed oil tank wall or water at the bottom of the oil tank. This should attract the attention of our maintenance personnel. Usually, it should be discovered and handled early to avoid equipment failure and accidents.
