Australian Coins will not rust since none of them contain any iron, they may develop a patina or become discoloured if left in a moist environment. The money tin may rust though.
It depends on the coin, however most will not as generally most coins do not contain iron (or steel). coins made from copper or tin will not rust ever.
Iron can are electroplated with tin to prevent the cans from rusting. Tin is a metal that resists rust.
A tin used for food packaging is actually tin-plated steel. So if the tin wears off, the steel beneath will rust.
A tin used for food packaging is actually tin-plated steel. So if the tin wears off, the steel beneath will rust.
Tin cans are not made entirely of tin, and the name "tin can" would be more accurate if it were "tinned can". The can is actually made of steel, plated on the outside with tin. The steel gives the can strength, and the tin plating helps to protect the steel from rusting. As your question indicates, there are situations in which the tin is not entirely successful in preventing rust. Aluminum cans are more naturally resistant to corrosion, and are also more easily made, because aluminum is more easily formed into a can than steel is.
Tin cans are actually made of steel that is coated with a thin layer of tin, which provides corrosion resistance. If the tin coating gets damaged or wears off, the underlying steel can rust when exposed to oxygen and moisture, leading to the appearance of rust on the can.
That depends on the difference in size between the pound coin and the 20p piece.
To effectively rust galvanized tin, you can use a vinegar and salt solution to remove the zinc coating, then expose the metal to moisture and oxygen to encourage rust formation.
The chocolate gold money wrapped in gold tin-foil is called Hanukkah-gelt (coins).
Because the probable tin coating is porous or damaged.
Modern coins cannot rust, as they are not made of iron.
Tin actually will corrode. It is not actually all that resistant to corrosion. It is, however, less susceptible to corrosion than iron. That may be where the myth that it doesn't rust comes from.