Originally Posted by Stumble
It doesn't look like a defect to me. The damage I am seeing looks like pretty standard corrosion
on stainless steel exposed to salt water
. Unless the parts
are less than a year old I don't see anything that lewmar is responsible for. This is just a good example of why stainless steel is being replaced by titanium.
I gotta agree with Greg here: that looks like a classic case of crevice corrosion to me. Brown stains, other propagating cracks, no sign of wear.
I do not know what alloy they use (or claim to use) but many mfg's use the more machinable s/s alloys in such applications, and these don't have very good corrosion resistance.
I'm always leery when I see brown stains around such s/s fittings. It always means something bad is going on chemically.
As it happens, I have a similar fiddle block in my backstay tensioner
. I'm about to step out into the cockpit
and have a look at mine. Thanks for the heads up!