I am on kidney dialysis, am I more likely to hepatitis c?

No. In theory no - however - and there is forever a however - there is blood stuff happening - and some centers resuse your filter (cleaned of course) - so if you have a hep c positive tech playing with your needles or they mix up your filter with your hep c neibhor - then there is trouble!
Yes. Hepatitis c is common in dialysis patients due to previous risk factors, but dialysis itself rarely can lead to hepatitis c infection if universal infection precautions are followed.