|
posted to rec.boats
|
|
external usenet poster
|
|
First recorded activity by BoatBanter: Mar 2008
Posts: 216
|
|
Grady White falls off of boat lift - Pics
On Jul 29, 12:46*pm, "Chuck" wrote:
"John H." wrote in message
...
On Mon, 28 Jul 2008 18:11:25 -0700 (PDT), "
wrote:
It could also be a case of disimular metals causing this accelerated
corrosion.
Marty
On Jul 28, 4:14 pm, "Chuck" wrote:
I know... I only post when I have a problem. This happened two weeks
ago.
The bolt on the front outer piling holding the boat lift cradle pulley
sheared right off and the boat went in the drink. Photos of the boat,
the
bolts, and some telltale corrosion streaks are stored at the links
below.
http://www.thespaceexplorers.com/cor...olts3.jpg(boat in water)
www.thespaceexplorers.com/corrodedbolts1.jpg(3/4 galv. bolts corroded
away
to nothing)
http://www.thespaceexplorers.com/cor...2.jpg(boltrust stains on pulley
housing)
OK. So my question is.......... is there any way to diagnose a
galvanized
bolts integrity before it rusts through like this again? I can't seem to
find my portable X-ray machine. I also can't quite figure out how to do
a
simple swapout on the other three. I don't know anybody who swaps their
lift bolts out every few years!
Chuck
I wondered if there might be a reaction between the zinc coating and the
chromium copper arsenate in the treated lumber. Lo and behold:
http://www.fpl.fs.fed.us/documnts/pdf1987/baker87a.pdf
Look at the comparisons between galvanized, aluminum, and stainless steel
rates of corrosion when in treated wood.
That was a good reference. *To catch everyone up, YES it is in sal****er.
|