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bolt corrosion pics?
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Oct 6, 2012
Does anyone have any pics of bolt corrosion from two different types of metals being in contact with each other. I could also use a concise explanation on why using two different metals for bolts/hangers is incorrect. The area I'm climbing in has galvanized expansion bolts with stainless steel hangers and some plated hangers. I will post pics of anchors and bolts I feel need to be replaced.

I don't have permission from the locals on replacing the anchors/bolts and I figured this may be the safest way to approach the subject without hurting thier feelings.

Peace Eric
Joined Apr 30, 2012
30 points
Oct 6, 2012 FrankPS
From Atascadero, CA
Joined Nov 19, 2009
278 points
Oct 6, 2012
The simple dirty answer is that different types of metal have a greater attraction for electrons than other types. As a result some metals steal electrons from other metals. The loss and gain of electrons results on the corrosion and loss of strength. Truck13
Joined Nov 11, 2011
0 points
Oct 6, 2012
It's a little thing known as 'dissimilar metals'. Exact same reason iron and aluminum don't mix well. Dan Felix
Joined Aug 24, 2012
46 points
Oct 6, 2012
From Fort Collins, CO
Joined Aug 5, 2006
487 points

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