Aluminum/Concrete Footing Chemical Reaction
Aluminum/Concrete Footing Chemical Reaction
(OP)
I'm installing an aluminum fence in concrete postholes. The aluminum posts will be in direct contact with the concrete. My sixth sense tells me there may be an adverse reaction between the concrete and aluminum. Do I have valid reason for concern.





RE: Aluminum/Concrete Footing Chemical Reaction
http://www.slideruleera.net/PCA-Page.html
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RE: Aluminum/Concrete Footing Chemical Reaction
RE: Aluminum/Concrete Footing Chemical Reaction
One successful method to isolate the aluminum is to dip the posts in clear urethane coating. Allow it to dry, then embed the post in concrete. This will last for many years without problems.
You may also dip or coat the post with asphaltic material; however, the heavy bodied asphalt coating actually creates a space between the aluminum and concrete that can cause the post to loosen with time.