There are similar corrosion marks at the joint between the impeller and the rotor
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The medium is toluene liquid. There are similar corrosion marks at the joint between the impeller and the rotor, but the medium is not corrosive. Therefore, the analysis is that mutual wear produces similar corrosion marks, but I am not sure. I would like to ask you for advice.
Look, this surface is corroded. It should be analyzed whether there is any connection between certain physical and chemical properties of the impeller, shaft and medium, and electrochemical aspects.
The wear is just scratches, which won’t produce such a furry effect. It should be caused by corrosion.
Is there some kind of electrolyte in the methanol solution?