ceramic coating on impller
ceramic coating on impller
(OP)
Gents,
any body has an experince on ceramic coating on duble suction pump impeller? this is to avoid the errosion wear we are having in the service. if so, do i need to coat the impeller and the wearing rings? if yes, then i need to work out the new running clearances as the thermal expansion is different, am i correct???how can i calculate the new required clearances??
SS-316 impeller and SS-410 wearing rings can be an option for an errosion wear???
regards
any body has an experince on ceramic coating on duble suction pump impeller? this is to avoid the errosion wear we are having in the service. if so, do i need to coat the impeller and the wearing rings? if yes, then i need to work out the new running clearances as the thermal expansion is different, am i correct???how can i calculate the new required clearances??
SS-316 impeller and SS-410 wearing rings can be an option for an errosion wear???
regards





RE: ceramic coating on impller
Please give more info on service medium.
RE: ceramic coating on impller
RE: ceramic coating on impller
RE: ceramic coating on impller
in oil well pumps, we have had success with both a teflon coating and also tungsten carbide coating of stages.
The teflon stage imparts some protection against solids and an added benefit has been some increase in efficiency.
The TC coating was done for a customer who wanted a slightly harder coating on a ni-resist stage
all the best
dadfap
RE: ceramic coating on impller
Thanks for the info.
the other problem is the process tempereture which is from the range of 130 to 150 deg C and i doubt teflon or neoprene will fit such temperature range.
how can i work out the new weraing rings clerances? do impeller and wearing rings to be coated to the same hardness?
upm
RE: ceramic coating on impller
what we did was spray and then remachine the areas necessary.
also, we use tungsten carbide inserts where we need to improve radial stability.
All the is on submersible multi stage centrifugals.
all the best
dadfap
RE: ceramic coating on impller
was looking through some old files this morning and came across another coating that may interest you.
It is called Fluidglide developed by a company called Corrocoat. There was an article in World Pumps Nov 1991 that went into quite a bit of detail on this.
It added corrision resistance and also some efficiency points were gained. I was looking at them in Australia at
www.corrocoat.com.au and they have an enquiry address enquiries@corrocoat.com
It is a while since I looked at their products but they may help.
All the best
dadfap
RE: ceramic coating on impller
i will give them a call
upm