Induction hardening is a heat treatment process in which a ferromagnetic material, such as steel, is heated by induction heating and then rapidly cooled, causing the surface of the material to harden while the core remains relatively soft. A chrome rod that has undergone induction hardening is referred to as an induction chrome rod. 

On the other hand, a standard chrome rod is simply a rod that has been coated with a layer of chromium for decorative or protective purposes. The chromium layer provides a hard and corrosion-resistant surface, but the underlying material has not undergone any heat treatment. 

So, the main difference between induction chrome rods and chrome rods is that induction chrome rods have undergone a heat treatment process to harden the surface, while standard chrome rods are simply coated with chromium.