Plating hardness with Cobalt is to add strength to the skin work piece to wear resistance and resistance to Dynamic Stresses by removing the steels resistant to intensive use of the skin of steel strength increases.
Surface hardness with Cobalt Is to increase the surface hardness. For durability against wear and withstands Dynamic Stresses led by steel resistant to heavy use. The surface hardness of steel has increased.
Surface hardening with Cobalt. The strengthening to the surface. For resistance to wear and durable Dynamic Stresses the steel features durable, easy to use hard. To make the surface of steel hardness increase.