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Corrosion & Chemical Resistance
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 Corrosion
and Chemical Resistance is a bona fide concern. The deteriorating
effects of corrosion and chemical attack on environmentally exposed
metal surfaces are obvious. Aluminum components, for example: an intake
manifold can become useless if its water ports are excessively damaged
by the result of erosion. How many times have you replaced aluminum
thermostat housings? Some high performance coatings, by their mere
composition, are multi-functional. Cradin performance coatings utilized
individually or in combination are significantly advantageous toward
component performance enhancement and operational durability.
Oil shedding is desirable for keeping oil off certain components that
are prone to oil carbonization and the reduction of oil windage. By
applying an oil shedding coating, one can reduce oil pickup of
 rotational
components. Coating valve springs of the double or triple helical type
can reduce frictional losses and breakage attributed to the inner and
outer coils chafing. Frictional heat generation can be responsible for
the de-tempering of springs. Coating valve stems considerably reduces
wear of the rubber oil seals that sit on top of the valve guides;
greatly prolonging their life and reducing oil leakage down the valve
stems into the ports and combustion chambers. An extremely high load
application is camshaft lobes; a coating containing high molybdenum
disulfide content is desirable. During dyno testing, we have see wear of
the coating on the up-side of the lobe ramp upon start up and after a
few hours of run, but no further deterioration after. Although some may
consider the coating "soft" for this application, benefits are gained by
friction reduction and reduced wear. |
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