"Scott Downey" wrote in message
...
Would this be worth spraying on the shafts, props and rudders?
I saw this at HD, Zinc galvanizing coating in a spray paint can.
It is $5 per can.

Since it is zinc and cheap It could not hurt right?



Galvatic corosion is still a bit a mystery to me, but wouldn't zinc
galvanizing or zinc rich paints erode away along with your anodes ?

Standard zinc paint has limitations as a sacrificial anode. There's
less than one volt electrical potential between Zinc and stainless or
bronze. And the organic binder in paint makes great electrical
insulation; so only a small fraction of the paint's zinc pigment will
contact and/or interact with the base metal. Sacrificial anodes have to
be placed on paint-free metal surfaces for this very reason.
As to the wearability of zinc/aluminum paint...and I havn't tried the HD
product you describe. It looks good the day of application.
Regards, Boatdreams.