Ever wonder what happens when you dissolve the aluminum on a soda can with liquid still inside? MEL Science may have answered that question with their latest video. The experiment reveals that there’s actually a plastic coating lining the aluminum can after the metal is dissolved away that acts as a barrier against the corrosive effect of acidic drinks on the reactive metal. This plastic liner also forms a barrier between the product and metal to provide protection against food-borne diseases.
Put simply, the carbon dioxide gas dissolves in liquids, which then forms an acid and gives carbonated drinks, like Coca-Cola a high levels of acidity. If this acid responsible, normally phosphoric acid, comes in direct contact with the metal aluminum it would react with the metal and corrode it, creating an aluminum compound known as aluminum phosphate as well as hydrogen gas.
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