Crevice Corrosion

[benz]

Thanks all! Phasing out all SS where something else will do is a constant process for me, but I like to keep informed

[Jim Fulton]

If I knew more metallurgy, I might understand all the ramifications of this:

As for reducing crevice corrosion for your SS gate closure terminals, I have found marrying SS and Silicon Bronze a successful way to reduce the corrosion on SS . Ie: bronze bolt thru a SS plate,,, a SS clevis pin in a bronze toggle, ect., or using bronze link plates instead of SS ones.

I don't know the relative galvanic potential of SS and silicon bronze, but wouldn't this combination hasten corrosion?

Jim Fulton

[Douglas]

Ahoy Jim , Yes , of course there is galvanic diferential between SS and Bronze .

Personally , in above water applications,I would rather have my structural bronze parts turn green than to have the connecting SS part rust, pit , and crevice corrode. The bronze turning green with corrosion is a bit like zincs on the prop shaft, sacraficial .

The slowness of the silicon or aluminum nickle bronze to degrade to a non-structural approval is one of it's great assets .

Like Brion has said many times before,,,, " Always try to build in a reserve of neglect ", when fabricating and assembling structural rigging and other boat hardware . He is "Spot On" with this advice.