Concrete, Metal and Salt Interaction
Concrete, Metal and Salt Interaction
(OP)
What is the best refernce for finding out the effects of concrete and salt including calcium chloride on steel?
I have looked at some stairs that the thin metal was used as risers and as formwork for the slate steps (thread). This metal appeared to be galvanized steel or tin. It was silvery color, at least the little areas that weren't heavily rusted. Anyway, looking from under the stairs and almost all the risers, there were severe rusting. In fact, I was told that the rusting started almost a year after the construction.
Any idea what could have caused it. Would limestone cause excessive rusting of the metal as well?
I have looked at some stairs that the thin metal was used as risers and as formwork for the slate steps (thread). This metal appeared to be galvanized steel or tin. It was silvery color, at least the little areas that weren't heavily rusted. Anyway, looking from under the stairs and almost all the risers, there were severe rusting. In fact, I was told that the rusting started almost a year after the construction.
Any idea what could have caused it. Would limestone cause excessive rusting of the metal as well?





RE: Concrete, Metal and Salt Interaction
RE: Concrete, Metal and Salt Interaction
If these stairs are in a place that will see salt you need to take two precautions.
You need to make extra sure that they will drain well.
And you need to use a lot heavier steel than you normally would. You can't really prevent the corrosion. If you are concerned about the apperance you might look at using coated steel. Epoxy over galvanizing will at least stand up for a while.
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Rust never sleeps
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RE: Concrete, Metal and Salt Interaction