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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. |
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