corrosion in aluminum mast - options
I have recently un-stepped my mast in order to make a repair. Upon further inspection i have noticed a small area of galvanic corrosion above the cabin, on the forward side of the mast, where a stainless fitting was mounted. The corrosion has eaten a small hole, less than 1/4" in diameter through the mast The mast is keel stepped. The rest of the mast is in very good condition, with a minimal amount of corrosion.
My plan is to make a 4"x4" aluminum "band-aid" and rivet it on for reinforcement. I also plan on applying something to stop the existing corrosion as well as re-bedding all current fittings with tef-gel.
Any feedback/advice on process and or products would be greatly appreciated.