WHAT
Method of applying a stainless steel coating to carbon steel or lower-alloy steel (i.e., steel with alloying element content below 5%).
WHY
To increase corrosion resistance at lower initial cost than exclusive use of stainless steel.
HOW
By (1) welding stainless steel onto carbon steel, (2) pouring melted stainless steel around a solid carbon steel slab in a mold, or (3) placing a slab of carbon steel between two plates of stainless steel and bonding them by rolling at high temperature on a plate mill.