Corrosion of centrifuge rotor in laboratory

  Some customers will find that the rotor of the laboratory centrifuge is corroded during use, which is due to the chemical corrosion on the rotor surface Under normal circumstances, there is a layer of anodized oxidation protective film on the surface of aluminum rotor, but it is very brittle and can be scratched by sharp hard objects when you are not careful
Acid, alkali and detergent can also erode it
Some high concentration salts also have adverse effects on aluminum rotor
It is stable only in medium close to neutral (pH = 6
5 ~ 7
5)
The titanium rotor has good chemical corrosion resistance
Acid, alkali and heavy metal salt solutions with pH = 3
5 ~ 11
0 have little corrosion effect on it, but the rotor surface is damp for a long time, and some substances such as chloroform, toluene, cesium chloride and alumina also cause corrosion The service life of the centrifuge rotor in the laboratory is determined according to the mechanical fatigue strength test under the condition of no corrosion
However, in practical work, due to chemical corrosion, local corrosion spots will appear on the rotor surface, reduce the mechanical properties of materials, and lead to stress concentration and stress corrosion
Stress corrosion is the main reason for the scrapping of aluminum alloy rotor, Therefore, we should clean the rotor after using the centrifuge
After the rotor has been used for a certain time, we should check it regularly to avoid corrosion Source of information: http://www
xinchengfengji
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