What Happens When Battery Acid is Spilled on Concrete?

Posted by in Buying/Maintaining a Home, Concrete | January 12, 2015

It doesn’t happen often, but when it does, “What should you expect?”

Concrete is a relatively indestructible material.  When a liquid is accidently spilled on it, wipe it up, and there seems to be no apparent damage.  Often times kitty liter, water, or muriatic acid is enough to clean up the evidence of the spill.

However, what happens when battery acid is spilled on concrete?

Battery acid is a mixture of sulfuric acid and water.  When the mixture comes in contact with concrete it may react with the components in the hardened Portland Cement or in the aggregate.  If this happens, surface deterioration will probably be visible.

To reduce the effects of the acid, immediately neutralize the acid by flushing the area with a solution of baking soda and water.  But, be careful not to get the acid on your skin or your clothing or in your eyes!

The good news is that even though the surface of the concrete may be damaged, the durability and the structural integrity of the entire floor slab will probably not be diminished.  The result is usually just another surface defect or imperfection that may require a surface repair.

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