This may help the discussion:
http://corrosion-doctors.org/Forms-g...-corrosion.htm
Note that galvanic corrosion and stray current corrosion are two different beasts, the latter being supercharged.
The stray current variety is the bane of marinas regardless of what type of water.
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Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
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