The deposit of calcium carbonate in the boiler is a bad conductor of heat.These deposits of calcium carbonate is stone like and is called ___ .

Most industries need super heated steam for different processes carried out by them. To produce this super heated steam, water is boiled in huge boilers and passed through pipes. If hard water containing calcium bicarbonate is used for this purpose, the calcium bicarbonate decomposes to insoluble calcium carbonate.The deposit of calcium carbonate in the boiler is a bad conductor of heat.This deposit is stone like and is called scaling.