Corrosion of Aluminium fittings in Seawater
Corrosion of Aluminium fittings in Seawater
(OP)
Has anyone got any experience of corrosion of Aluminium fittings in Seawater?
I know that Aluminium is used in anodes, so would expect a sacrificial "reduction" over a period of time.
The specific case is with Aluminium "ferrules" which terminate the end of wire ropes. The wire rope will be "touching" carbon steel pipe, although full electrical continuity may not be achieved. The internals will be filled with seawater.
We have seen cases of Aluminium "fizzing" away after days and other cases where the period is "months". This will obviously depend on the alloy used.
Any guidance on typical "life" and/or experience of this type of fitting would be appreciated.
Thanks
Steve
I know that Aluminium is used in anodes, so would expect a sacrificial "reduction" over a period of time.
The specific case is with Aluminium "ferrules" which terminate the end of wire ropes. The wire rope will be "touching" carbon steel pipe, although full electrical continuity may not be achieved. The internals will be filled with seawater.
We have seen cases of Aluminium "fizzing" away after days and other cases where the period is "months". This will obviously depend on the alloy used.
Any guidance on typical "life" and/or experience of this type of fitting would be appreciated.
Thanks
Steve





RE: Corrosion of Aluminium fittings in Seawater
Another alternative to zinc is magnesium but if you are in seawater go for zinc.
RE: Corrosion of Aluminium fittings in Seawater
Come back with a little more information on physical location and surroundings.
RE: Corrosion of Aluminium fittings in Seawater