Editing Health and safety in the shop or garage (section)
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===Don't use acid to clean concrete=== Using acid to clean concrete can crumble and flake your concrete surface. Acid doesn't actually "clean" concrete -- it '''dissolves''' it. The acid soaks into the concrete, and will continue to damage it until it is neutralized. Instead of sulfuric or muriatic (hydrochloric) acid, or any other kind of acid, use a commercial product specifically designed for cleaning concrete. Water will dilute acid to the point of being neutralized if enough water is used. Never add water to acid (remember the old chemistry class saying "do like you oughta, add acid to the water"). Always add acid '''slowly''' to water. In fact, sulfuric acid (and other strong acids) produces heat when it is introduced to water. The resulting exothermic reaction can almost instantly boil the water, blowing acid all over your body, leading to acid burns. ====Don't use battery acid to remove rust==== Besides the fact that battery acid is extremely dangerous to handle, it can cause hydrogen embrittlement, which severely weakens metal. ====Medical and government references on sulfuric acid==== *[http://www.osha.gov/dts/chemicalsampling/data/CH_268700.html OSHA page on sulfuric acid] *[http://www.bu.edu/es/labsafety/ESMSDSs/MSSulfuricAcid.html Sulfuric acid MSDS]
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