Six testing standards for thermal oil quality indicators
author: Ann
2024-11-18
1. Look at the appearance
From the appearance, there is not much difference between inferior products and standard products, but if you observe carefully, you will find that inferior products will change color even at room temperature. This change will gradually change from light yellow to dark black. Over time, inferior products will be exposed without entering the system.
From the appearance, there is not much difference between inferior products and standard products, but if you observe carefully, you will find that inferior products will change color even at room temperature. This change will gradually change from light yellow to dark black. Over time, inferior products will be exposed without entering the system.
2. Pour point depressant evaporates at high temperature
From the product indicators, there are many indicators of heat transfer oil, and the main ones can be tested first. The pour point test can show whether the oil is fake. Even if it is fake, the inferior product can be exposed by simple high-temperature heating. The pour point depressant of heat transfer oil after high temperature will evaporate completely during the heating process, making the pour point depressant ineffective.
From the product indicators, there are many indicators of heat transfer oil, and the main ones can be tested first. The pour point test can show whether the oil is fake. Even if it is fake, the inferior product can be exposed by simple high-temperature heating. The pour point depressant of heat transfer oil after high temperature will evaporate completely during the heating process, making the pour point depressant ineffective.
3. Look at volatility
From the volatility characteristics, take the same number of samples for comparison to see the degree of volatility. Generally, inferior products will evaporate more and produce thick black smoke due to their low flash point.
From the volatility characteristics, take the same number of samples for comparison to see the degree of volatility. Generally, inferior products will evaporate more and produce thick black smoke due to their low flash point.
4. Look at the flash point
From the flash point characteristics, although the flash point of oil is an indicator, it is related to its degree of refinement to some extent. Therefore, sometimes the characteristics of a product can be determined by the flash point, because the higher the degree of refinement, the relatively stable product quality.
From the flash point characteristics, although the flash point of oil is an indicator, it is related to its degree of refinement to some extent. Therefore, sometimes the characteristics of a product can be determined by the flash point, because the higher the degree of refinement, the relatively stable product quality.
5. Measure oxidation stability
From the oxygen absorption rate, the oxidation stability index of the heat transfer oil is tested by professional equipment. The slower the oxygen absorption rate, the stronger the antioxidant ability, and vice versa.
From the oxygen absorption rate, the oxidation stability index of the heat transfer oil is tested by professional equipment. The slower the oxygen absorption rate, the stronger the antioxidant ability, and vice versa.
6. Crucible heating to see changes
From the perspective of thermal stability, if there is no condition for bench testing, the quality of the oil can be judged simply on the crucible. Generally, inferior heat transfer oil will catch fire when heated at high temperature and will be severely carbonized if it does not reach a certain temperature. Although we cannot use ignition as the only criterion for judging the quality, at least through simple experiments, we can see some things that we could not see before.
From the perspective of thermal stability, if there is no condition for bench testing, the quality of the oil can be judged simply on the crucible. Generally, inferior heat transfer oil will catch fire when heated at high temperature and will be severely carbonized if it does not reach a certain temperature. Although we cannot use ignition as the only criterion for judging the quality, at least through simple experiments, we can see some things that we could not see before.
The road to carbon reduction of lubricants under the background of "dual carbon"(3)
ما هو الفرق بين اللزوجة وصلابة الشحوم ؟
