mast corrosion - how serious? pic attached
I recently bought a 1977 Tartan 34C in decent shape. But I just discovered some corrosion on the keel-stepped aluminum mast (see photo). It appears that the metal fitting of the pictured connector for the mast antenna had been touching the mast and together with some spray dripping down the mast resulted in galvanic corrosion.
How serious is this? Does it need to be fixed immediately? I am a bit worried that the corrosion is close to the mast step and that mechanical pressure in this region is higher than elsewhere on the mast.
What repair can be done, and how?
New York City