With the continuous development of the times, low-hydrogen silicone oil is widely used in the field of hydraulic oil, especially aviation hydraulic oil, by taking advantage of its good shear resistance. Not only that, it can also be used to treat rayon spinning heads, which can eliminate static electricity and improve spinning quality. However, in life, we will also encounter some situations where low-hydrogen silicone oil deteriorates. In order to show off and encounter similar situations, its deterioration detection method is:
1. Hand-twisting method
Twist the low-hydrogen silicone oil between the thumb and forefinger and grind it repeatedly. The better oily hand feels lubricating, less wear debris, and no friction. If you feel a large friction feeling such as sand between fingers, it means that there are many impurities in the oil. It can no longer be used and should be replaced;
2. Illumination method
On a sunny day, lift up the low-hydrogen silicone oil with a screwdriver and make an angle of 45 degrees with the horizontal plane. Contrast the sunlight, observe the condition of the oil droplets, under the light, you can clearly see that there is no wear debris in the oil, it is good, and it can continue to work. If there are too many wear debris, it should be replaced.
In addition, we can also take a piece of clean white filter paper and drop a few drops of low-hydrogen silicone oil on the filter paper. After the lubricating oil leaks, if there is black powder on the surface and feels astringent when touched by hand, it means that there are many impurities in the low-hydrogen silicone oil. A good low-hydrogen silicone oil is a liquid that has no powder, is dry and smooth to the touch, and shows yellow traces.

About hydrogen silicone oil, please check the details:
https://www.siliconefoam.net/product-methyl-low-hydrogen-silicone-oil-iota-203-.html