Regularly maintain the mini centrifuge rotor to prevent corrosion.
Release time:
2015-09-11
Overview:
As a crucial component of mini centrifuges, the quality of the rotor directly determines the centrifuge’s rotational speed and is also highly significant for the subsequent operation of the centrifuge. Therefore, selecting the right centrifuge rotor is of great importance.
As a Mini centrifuge A crucial component—the quality of the rotor directly determines the centrifuge’s rotational speed and is also highly significant for the centrifuge’s subsequent operation. Therefore, selecting the right centrifuge rotor is of great importance. Typically, most centrifuges can accommodate centrifuge tubes of various sizes, provided that you either change the rotor or use a rotor equipped with a different adapter or compatible accessory. The three most common types of rotors used in mini-centrifuges are angular rotors, vertical-tube rotors, and horizontal rotors.
1. Angle Rotor: For the installation of mini centrifuges, angle rotors are more efficient than horizontal rotors when separating particles, as the centrifuge’s sedimentation path is shorter, allowing for faster particle settling.
2. Horizontal rotor: The centrifuge tubes containing the samples are placed inside a bucket that rotates at the rotor’s acceleration rate. Horizontal rotors are used in low-speed centrifuges, and their main drawback is that they lengthen the path of sedimentation. Meanwhile, convection currents generated during deceleration can cause the settled particles to resuspend themselves.
3. Vertical rotor: Used in high-speed and ultrahigh-speed centrifuges for density-gradient centrifugation. This type of rotor cannot be used to collect particles from the suspension until a pellet has formed.
For Mini centrifuge In addition to understanding the different types of rotors and how to select the right one, we also need to be familiar with some common rotor failures. Among these, the most frequent is corrosion of centrifuge rotors. During operation, we often observe instances of rotor corrosion, which is primarily caused by chemical corrosion on the rotor’s surface.
As we all know, under normal circumstances, the surface of a mini-centrifuge rotor is coated with an anodized oxide protective film that can easily be scratched by sharp or hard objects. Moreover, substances with acidic or alkaline properties, as well as high-concentration salt solutions, can also corrode this film; the film remains stable only in nearly neutral media. In contrast, titanium rotors exhibit excellent resistance to chemical corrosion—ordinary acids, bases, and heavy-metal salt solutions have little corrosive effect on them. However, if the rotor surface is exposed to prolonged moisture, certain substances such as chloroform, toluene, cesium chloride, and aluminum oxide can still cause corrosion.
Mini centrifuge The service life of the rotor is primarily determined through mechanical fatigue strength tests conducted under non-corrosive conditions. However, in actual operation, chemical corrosion can lead to localized corrosion spots on the rotor surface, reducing the material’s mechanical properties and causing stress concentrations that result in stress corrosion. Stress corrosion is the primary reason for the scrapping of aluminum alloy rotors. Therefore, after using the centrifuge, we must move the rotor and clean it promptly. Moreover, after the rotor has been in use for a certain period, regular inspections are essential to prevent corrosion.
1. Angle Rotor: For the installation of mini centrifuges, angle rotors are more efficient than horizontal rotors when separating particles, as the centrifuge’s sedimentation path is shorter, allowing for faster particle settling.
2. Horizontal rotor: The centrifuge tubes containing the samples are placed inside a bucket that rotates at the rotor’s acceleration rate. Horizontal rotors are used in low-speed centrifuges, and their main drawback is that they lengthen the path of sedimentation. Meanwhile, convection currents generated during deceleration can cause the settled particles to resuspend themselves.
3. Vertical rotor: Used in high-speed and ultrahigh-speed centrifuges for density-gradient centrifugation. This type of rotor cannot be used to collect particles from the suspension until a pellet has formed.
For Mini centrifuge In addition to understanding the different types of rotors and how to select the right one, we also need to be familiar with some common rotor failures. Among these, the most frequent is corrosion of centrifuge rotors. During operation, we often observe instances of rotor corrosion, which is primarily caused by chemical corrosion on the rotor’s surface.
As we all know, under normal circumstances, the surface of a mini-centrifuge rotor is coated with an anodized oxide protective film that can easily be scratched by sharp or hard objects. Moreover, substances with acidic or alkaline properties, as well as high-concentration salt solutions, can also corrode this film; the film remains stable only in nearly neutral media. In contrast, titanium rotors exhibit excellent resistance to chemical corrosion—ordinary acids, bases, and heavy-metal salt solutions have little corrosive effect on them. However, if the rotor surface is exposed to prolonged moisture, certain substances such as chloroform, toluene, cesium chloride, and aluminum oxide can still cause corrosion.
Mini centrifuge The service life of the rotor is primarily determined through mechanical fatigue strength tests conducted under non-corrosive conditions. However, in actual operation, chemical corrosion can lead to localized corrosion spots on the rotor surface, reducing the material’s mechanical properties and causing stress concentrations that result in stress corrosion. Stress corrosion is the primary reason for the scrapping of aluminum alloy rotors. Therefore, after using the centrifuge, we must move the rotor and clean it promptly. Moreover, after the rotor has been in use for a certain period, regular inspections are essential to prevent corrosion.
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