1.   Chemicals, mostly salts, are used to melt it.

2.   The culprit is salt, used to melt snow and ice, and the disease is salt shock.

3.   The furnace Kramer used to melt the gold resembles a large crockpot and is made of cast iron, the police said.

4.   The problem stems from corrosion caused by road salt used to melt snow and ice in the winter, Ford spokesman Mike Vaughn said Tuesday.