1. Corrosion of Centrifuge Rotor In the use of centrifuges, the corrosion problem of centrifuge rotors has always been an important factor affecting the life of rotors and affecting the safety of centrifuges. The manufacture of the rotor is generally made of alloy aluminum with high strength and light weight. Alloy aluminum is widely used in the manufacture of ultra-speed centrifuges and high-speed centrifuge rotors because of its low price, convenient source and easy processing. Especially used in high speed centrifuges with relatively low speeds. However, aluminum in alloy aluminum is a chemically active metal element. Copper, magnesium, zinc, etc. are alloying elements that can strengthen aluminum. Therefore, alloy aluminum materials often contain copper, zinc, magnesium, etc., among which copper is strengthened. The effect is the greatest, and the corrosion resistance is also the most severe. The electrochemical properties and equilibrium potential of aluminum are very low, and hydrogen evolution corrosion may occur in a wide range of pH. In the environment of oxygen and other harmful gases and corrosive chemical vapors in the air, elements such as copper and zinc in the alloy material may cause a series of redox, charge change, and atomic precipitation to cause alloy lattice corrosion damage. Crystal lattice changes in alloy metal materials cause a decrease in stress intensity. This is a kind of corrosion of alloy metal under natural conditions in the air. The influence of this corrosion will increase with time and increase with time, thus affecting the service life of the rotor.
2. Use and protection of rotors A wide variety of centrifuges are now being used more and more widely as a laboratory instrument. However, in many places, due to conditions, harmful gases are often present in the environment or in a humid environment. These conditions will accelerate the occurrence and expansion of the corrosion phenomenon of the centrifuge rotor, affecting the service life of the rotor. When the rotor is damaged during use, it will leak due to damage to the centrifuge tube. If the filling is too full or the seal is not tight, liquid leakage may occur. The liquid in the centrifuge tube often contains various corrosive media such as strong acids, strong bases, and harmful metal salts. If a leak occurs, the rotor hole is often corroded due to contamination. In fact, the lower part of the inner wall of the rotor hole is also the area most prone to corrosion. This is because the rotor is more susceptible to damage, pitting, and cracking of the metal structure under the action of centrifugal force in a strong centrifugal force field. When the corrosion is serious, the bottom of the hole will have dark spots, pitting, falling off, cracks, etc., which are hidden dangers of the accident and will affect the service life of the rotor. Some users do not follow the operation requirements, do not clean the rotor after use, do not even remove the rotor from the shaft, and place it on the shaft for a long time. The contact surface between the rotor and the shaft is intensified under the stress. This may cause a "catch" phenomenon.
In order to prevent the occurrence of hidden troubles of the corrosion machine, the use of the sample of the centrifuge tube and the tightness of the seal should be paid attention to during the use of the rotor, and it is often checked whether the seal ring is intact. If aging or damage occurs, it should be replaced in time to avoid leakage and prevent the corrosive solvent from coming into direct contact with the rotor. After using the rotor, rinse, wipe and spray the protective agent in time to protect the grease. Mechanical damage is also a cause of corrosion caused by rotor damage. Therefore, the use and storage of the rotor should prevent the rotor from being bruised, scratched or scratched to prevent mechanical damage. The environment in which the rotor is stored should be kept dry, placed on a special shelf, placed in a cabinet or placed in a desiccator containing hygroscopic silica gel. To avoid corrosion of the bricks caused by bad environment and reduce the service life of the rotor.
2. Use and protection of rotors A wide variety of centrifuges are now being used more and more widely as a laboratory instrument. However, in many places, due to conditions, harmful gases are often present in the environment or in a humid environment. These conditions will accelerate the occurrence and expansion of the corrosion phenomenon of the centrifuge rotor, affecting the service life of the rotor. When the rotor is damaged during use, it will leak due to damage to the centrifuge tube. If the filling is too full or the seal is not tight, liquid leakage may occur. The liquid in the centrifuge tube often contains various corrosive media such as strong acids, strong bases, and harmful metal salts. If a leak occurs, the rotor hole is often corroded due to contamination. In fact, the lower part of the inner wall of the rotor hole is also the area most prone to corrosion. This is because the rotor is more susceptible to damage, pitting, and cracking of the metal structure under the action of centrifugal force in a strong centrifugal force field. When the corrosion is serious, the bottom of the hole will have dark spots, pitting, falling off, cracks, etc., which are hidden dangers of the accident and will affect the service life of the rotor. Some users do not follow the operation requirements, do not clean the rotor after use, do not even remove the rotor from the shaft, and place it on the shaft for a long time. The contact surface between the rotor and the shaft is intensified under the stress. This may cause a "catch" phenomenon.
In order to prevent the occurrence of hidden troubles of the corrosion machine, the use of the sample of the centrifuge tube and the tightness of the seal should be paid attention to during the use of the rotor, and it is often checked whether the seal ring is intact. If aging or damage occurs, it should be replaced in time to avoid leakage and prevent the corrosive solvent from coming into direct contact with the rotor. After using the rotor, rinse, wipe and spray the protective agent in time to protect the grease. Mechanical damage is also a cause of corrosion caused by rotor damage. Therefore, the use and storage of the rotor should prevent the rotor from being bruised, scratched or scratched to prevent mechanical damage. The environment in which the rotor is stored should be kept dry, placed on a special shelf, placed in a cabinet or placed in a desiccator containing hygroscopic silica gel. To avoid corrosion of the bricks caused by bad environment and reduce the service life of the rotor.
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