Galvanic corrosion
True North wrote:
Went to a local maker of boat covers within walking distance of home and wasn't surprised to hear that they do come across the problem regularly....especially with older boats in for a new cover.
Guh gave me a few tips of how he frees up corroded screws etc.
Then went to the local marine supply store where I talked to an ex coast guard guy who used to install aluminum towers and stainless fittings on our salty coast.
He told me they used nylon washers and gaskets to separate the metals and recommend dedicated a product called Lanocote to apply to the screw shafts.
They didn't carry PB Blaster but he advised that a local hardware store did, so that was my next stop.
Took a peek at their manual impact screw driver, but at $43. I'll see if I really need it.
If I can't find the proper washers locally I may go over time Princess Auto and buy the property sized punch to make my own washers out of ice cream plastic containers.
Now *that's* funny!
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