Because titanium quickly forms a microscopic layer of titanium
oxide when exposed to air, it is notoriously difficult to bond to.
In can be done, but the tianium has to be prepared properly.
The surface should be mechanically abraided (sand paper or
scotch-brite), then chemically etched. Then the bond has to be
made within an hour or two, or the surface will oxidize. Combine
that with the blind-bond that this likely is because the stay is
inserted
into the titanium, and it's pretty easy to see why a bad bond is
likely.
I've never owned a titanium frame, but I always thought the beauty
of titanium was those nice plush seat stays that gave you the nice
comfortable ride. Why did they replace those with graphite?
Sounds like a marketing gimic.
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[email protected] wrote:
> Qui si parla Campagnolo wrote:
> > campycd wrote:
> > > The carbon seat stay is coming out of the ti frame(unglued). Have you
> > > seen or had this problem. What will Litespeed do for you? Can I still
> > > ride for a few more miles?
> >
> > I wouldn't and I'd send it to ACG(Litespeed maker) asap...if no
> > warranty, at least they will fix it..another reason to not glue carbon
> > and metal together. NOT unusual with lots of frames of this design.
>
> Not unusual at all but sadly by now it should be a thing of the past.
> The cause is normally a phenomenon called Galvanic Corrosion .. the
> same thing that causes aluminum seat posts to bind in Steel frames. Ask
> Kestrel how many of their early Bottom Bracket shells came loose.
> Typically to get around this problem the manufacturer would bond an
> insulating element (in aerospace we often used Mylar) between the CF
> and the metal.
> I hope by this point that problems like this are isolated incidents.