The electro-chemical deposition of a thin layer of metal on the surface of another material is known as galvanizing. This process plays an important role in improving the corrosion resistance of iron and steel components, but it can also be used to improve the hardness or surface slip properties significantly (as chrome coatings do). The physical principles are fairly simple: electrical current is applied to an electrolytic solvent bath. The metal used for the coating is located at the positive pole (anode); the casting to be coated is located at the negative pole (cathode). The current dissolves metal ions from the “sacrificial” electrode, which are deposited on the surface of the casting via reduction. The longer the casting spends in the bath and the higher the current is, the thicker the metal layer becomes. The process is differentiated according to the material used for coating (the substrate): Bronzing, chrome-plating, chromate conversion coating, phosphate coating, and zinc-plating. In principle, all cast iron materials are suitable for galvanizing processes; in some cases, however, it may be more cost-effective depending on the end goal to consider switching materials – for example, exchanging SG cast iron for ADI in order to obtain better surface hardness values.