[Public-list] Rudder shaft

[Chris Blain]

Just for reference - Bronze is not a soft metal. If it has been subjected to
Galvanic corrosion, it can be greatly weakened, but then it still usually
fails in a brittle mode rather than a ductile (twisting) one.

Bronze rudderstocks have long been used in this application. Stainless is
now widely used, but is fairly poor choice for this application, as,
ironically, it can be very succeptiable to corrosion if not correctly
passivated, bonded and protected. Some Stainless alloys are better than
others, so make sure that you use an established marine fabricator if you do
decide to go that route.

Cheers,
Chris


On 8/8/06, George White <salty at ns.sympatico.ca> wrote:
>
> Our rudder shaft has a twist in it (probably caused by a strong hit
> against a sunken cement pillar or being towed out from a grounding!) and
> will have to be replaced.  It appears to be a soft metal - possibly bronze.
>
> Are their any suggestions or experience as to whether it should be
> replaced with a hard metal such as stainless steel or a soft metal.
>
> Thanks,
>
> George & Kathy White
> Close Harmony # 637
> _______________________________________________
> These businesses support your Association:
> http://www.alberg30.org/store/A30supporters.html
> Please support them.
> _______________________________________________
> Public-list mailing list
> Public-list at alberg30.org
> http://alberg30.org/mailman/listinfo/public-list
>

 1155055430.0