Attaching stainless staunchions to alloy deck

colin wrote:
> Any new ideas on preventing corrosion when stainless steel rails are
> attached to aluminium? A recent trend has been to insert, and pin, nylon
> rods between a short alloy base tube and the ss staunchion. This keeps the
> two metals separated. Any comments? Better methods? The job is a new 14
> metre powercat

1. Polished clear anodized aluminum rails?

2. Is the alloy tube on the inside or outside? If outside,
I'd expect more corrosion because of trapped water in the
socket.

3. Welded s.s. stanchion bases. Bolt to deck, isolating
the s.s. base with a suitable thin plastic and tef-gel on
the bolts.

But I don't think any of these are really better.

Evan Gatehouse