Pretreatment is the preparation of a feed, be it metal, before the actual reaction that needs to be carried out for enhancing the effects of the same reaction. For example, pretreatment, before metal stripping is carried out, involves the immersion of the object in an extremely hot aqueous/alkaline cleaner and then proceeding for cathodic activation in am electro cleaner. In electrocoating pretreatment, a metal is cleaned thoroughly removing specks of dust, rust, and oils for better electro-coated painting where a phosphate or other conversion coating could now be applied. Pretreatment for powder coating follows the same procedure for cleaning the metal layer as it is highly susceptible to atmospheric corrosion.