Galvanic Corrosion w/ Stainless Steel

Apr 30, 2002

I'm looking at replacing some stainless steel cables that will be immersed in water (fresh water). I will need to install eyelets on the cables and therefore need to crimp them to terminate the loop. I've be given differing opinions on the type of crimps to us. Should they be Aluminum or Copper?? (to limit galvanic corrosion)

I'm also replacing some bolts that fasten aluminum tubing together. I was thinking SS since the aluminum is also in water. Will the combination of material induce significant corrosion?? If so, what bolting material should I use??

Thanks for your help!!

CoryPad · Apr 30, 2002

I will leave your first question to others.

Regarding your second question, there is a strong possibility of galvanic corrosion if you couple stainless steel fasteners with aluminium components and have an electrolyte (which your application seems to have). I would recommend aluminium fasteners - they are available from several sources.

boo1 · May 1, 2002

For the crimps I recommed zinc coated copper. You could weave the thimble in place. Recommend not using 303 stainless cable though.

For the fastener use 302 or 316 stainless steel and install dielectric washers or wet install with proseal to provide the galvanic seperation.

Cheers

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Galvanic Corrosion w/ Stainless Steel

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CoryPad

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boo1

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