Posted by Gordon England (62.252.0.12) on 14:42:47 07/02/05
In Reply to:Internal Coating of a Stack posted by Raghav
:pDear Gordon,
: What kind of arc spray coating would you suggest for internal coating of an exhaust stack, the temperature for which is between 100 deg C to 200 deg C.
: S02 and NOX are both present in the environment.
: SO2 - 2.98 P.P.M
: NOZ - 3.59 P.P.PM
: 140 deg C is tried to be maintained constantly. But when that does not happen and the temperature drops, the moisture mixes with the gases forming diluted H2SO4 AND HNO3.
: What kind of an arc spray coating would you suggest and is sealant required ? If yes What is the kind of sealant that is recommended.
: What is the life that can be expected of the coating ?
: Thanx,
: Regards,
: Raghav
I would consider aluminium as a sacrificial coating. Inconel 625 should be a good noble type coating, but needs to exclude environment 100% to be effective. A silicone based sealer for both coating types. Very difficult to give any prediction on service life.
Regards Gordon
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