Limestone/Steel Interaction
Limestone/Steel Interaction
(OP)
Would limestone or even slate cause premature rusting of the steel or even galvanized steel?
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Limestone/Steel Interaction
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RE: Limestone/Steel Interaction
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Cory
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RE: Limestone/Steel Interaction
RE: Limestone/Steel Interaction
LewTam Inc.
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RE: Limestone/Steel Interaction
Thanks,
RE: Limestone/Steel Interaction
Also, are you cementing or mortaring the stone into place. Ordinary cement or concrete won't last as long as a good "flexible" polymerized thinset mortar.
Good luck.
RE: Limestone/Steel Interaction
Limestone is porous so always contains water due to humidity & rain, absorbs salts used for melting ice and also has its own ions to act as electrolyte. So, you often see rust streaks from steel in limestone.
I recall the equilibrium pH of air + water + limestone being about 8, which is not sufficiently alkaline for maximum stability [minimum solubility] of ferric hydroxide (solid). Best is a higher pH, e.g., about 10-11 as in most cured concretes.
RE: Limestone/Steel Interaction
For long-term applications of this nature (50+ years), we use 304 or 316 stainless hardware.