Yep that is what I'm thinking.





No.

But remember that anodising is basically nothing more then artificially creating an extra thick layer of Alu-oxide on the surface of alu. The alu oxide is both hard and very compact, as such it delays or stops further oxidation. Sadly this is not enough to stop galvanic corrosion or to prevent threads to seize up under galvanic corrosion.

Of course stainless is iron based and rust (iron oxide) is neither hard or "compact" and will not delay further corrosion by any significantly amount. It may even accellerate is by retaining water in the pores.

Anyway what I really wanted to say here is that anodising is not a surface treatment to removes or prevents oxidising (rusting); in fact it IS oxidizing where we are lucky enough that Alu-oxide has such properties that further oxidation is much delayed. Steel is very different and the oxidating because of having these two material make contact is therefor also different. This can still be acceptible when riveting; the rivets will only sits more tightly, but for threads that need to be adjusted now and then this is not acceptible.


I feel that the company selling these spreader arms (and I have the same setup) has made an mistake in combining stainless steel threads with alu busses.

Wouter