LYCOS RETRIEVER 
Hydrochloric Acid: Metals
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Hydrochloric acid is one of the most corrosive of the non-oxidising acids in contact with copper alloys, and is handled in dilute solutions. Contact with metals produces hydrogen gas, which creates the chance of an explosion. It produces poisonous gas, including chlorine, in a fire. It is soluble in benzene, alcohol, and ether; it is insoluble in hydrocarbons, and incompatible or reactive with metals, hydroxides, amines, and alkalis. Hydrochloric acid's fumes have an acid, penetrating odour. Aqueous solutions of hydrochloric acid attack and corrode nearly all metals, except mercury, silver, gold, platinum, tantalum, and certain alloys.
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Concentrated hydrochloric acid is a colourless or slightly yellow, fuming liquid with pungent, choking odour. Dilute hydrochloric acid is a colourless liquid with a pungent odour. Will not burn. Decomposes under intense fire conditions to form extremely flammable and potentially explosive hydrogen gas and very toxic and corrosive chlorine gas. Closed containers may develop pressure on prolonged exposure to heat and rupture violently. Contact with common metals produces extremely flammable hydrogen gas.
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Unlike sodium chloride, hydrochloric acid is not easy to handle and safety precautions are a MUST! This acid has a sharp, irritating odor and is highly corrosive, meaning, it damages most things it touches. You may be wondering how such a reactive liquid can be stored without ruining its container. Metal containers are out for this acid, but plastic containers, such as those made of PVC (polyvinyl chloride) stand up very well.
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In this interactive activity adapted from Iowa State University, observe the chemical reaction that occurs when different metals are dipped in a solution of hydrochloric acid. Hydrochloric acid dissolves some metals to form oxidized metal chlorides and hydrogen gas, the latter of which is visible in the animation as bubbles floating to the surface. Depending on their atomic structure and how readily they give up electrons when exposed to hydrogen ions in an acidic solution, certain metals, including zinc and magnesium, corrode more easily than others.
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The call came after a 55-gallon drum of hydrochloric acid fell off of a truck and ruptured, said police. The spill happened at Minnesota Metal Finishing, located at 909 Winter St. N.E.
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A strong mineral acid, concentrated hydrochloric acid is highly reactive with strong bases, metals, metal oxides, hydroxides, amines, carbonates and other alkaline materials. Incompatible with materials such as cyanides, sulfides, sulfites, and formaldehyde.
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