Centrifugal separator with anti-fouling properties

A centrifugal separator arranged for continuous separation of a fluid mixture into components, comprising:

• a rotor, said rotor forming within itself a separation chamber, comprising in said separation chamber a set of separation discs defining separation passages between adjacent separation discs;
• an inlet operatively connected to said rotor for continuous supply of a fluid mixture to be separated in the separation chamber;
• a first outlet for a separated lighter first component of the fluid mixture extending from a radially inner portion of the separation space;
• and
• a second outlet for a separated denser second component of the fluid mixture extending from the radially outer portion of the separation space,
• wherein the separation discs are at least partly provided with a coating that:
• has a layer thickness of about 5-60 μm;
• is prepared by sol-gel processing;
• comprises silicon oxide, SiOx, having an atomic ratio of O/Si>1;
• and
• comprises ≧10 atomic % of carbon.