Anodizing is a process during which the surface of metal is transformed into a protective coating. However, there are several synonyms for anodizing that describe this process differently. For example, electroplating is a synonym for anodizing that describes the process of coating metal with a thin layer of another metal using a powered electric current. Passivation is another synonym for anodizing that refers to the process of treating metal with acid in order to form a protective oxide layer. Metal oxide coating and surface treatment are also synonyms for anodizing that describe the process of transforming the surface of metal in order to protect it from corrosion. Regardless of the terminology, anodizing and its synonyms remain important techniques for protecting metal surfaces from damage.