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<p>[QUOTE=&quot;Conder101, post: 300236, member: 66&quot;]Often it is not really deliberate.&nbsp; When most people talk about acid they think of so fast acting corrosive solution. In fact in nature most all liquids are either acidic or basic to some extent, and both types are corrosive.&nbsp; Every rain puddle you see onthe ground is usually slightly acidic. (Sometimes strongly so, think acid rain)&nbsp; If the water flows through or over decaying plant or animal matter it will become even more acidic.&nbsp; Water runoff from steets is often very acidic and usually contains salts as well.&nbsp; Salts and water can be very damaging to metals.&nbsp; Soevery coin out side on the ground, in a puddle, a sewer, or even in a pond or streem is usually in an acidic environment and over time the acids will corrode and pit the coins.&nbsp; Sometime just the moisture that condenses out of the air in your jar of coins can do it as the condensat reacts with the skin acids and salts on the surfaces of the coins from them having been handled.&nbsp; You will often see that the coins on the bottom of the jar have rings of corrosion around them for that very reason.&nbsp; The condensate works its way down to the bottom an those coins start to corrode.[/QUOTE]</p><p><br /></p>

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