And steel compared to the high thermal conductivity of aluminum, aluminum welding supply manufacturers, you need high heat input. When welding large cross section needs to be preheated. When using resistance welding aluminum, and welded steel compared, because aluminum has a high electrical conductivity, so they need a larger current and short welding time to accurately control the welding parameters. Because aluminum is not magnetic, when welding with direct current arc will not blown migraine. Therefore, it can be used as welding apron and fixtures. The presence of the oxide film on aluminum and aluminum side also has a protective effect. Because of its relatively dense tissue, strong adhesion to aluminum, can prevent oxidation of aluminum metal to continue to protect the metal from damage. And higher purity aluminum, against the more favorable corrosion. Because the presence of impurities, in addition to affecting the oxide film and the metal adhesion, but also may cause other forms of corrosion. According to this feature of the aluminum oxide film price, for an oxide film can promote the generation, it does not work with media, such as nitric acid, cerotic acid, etc., often aluminum as a storage container, while the film does damage medium, such as hydrochloric acid, alkali and salt, etc., because it can quickly destroy the oxide film, the aluminum corrosion, aluminum is highly corrosive, and therefore the storage medium such as a container can not be aluminum. Supply aluminum manufacturers, aluminum, aluminum rolls provided by the Aluminum Co., Ltd. Jinan rolls. Jinan Heshun Aluminum Co. (www.jnhsly.com) strong, credible, in Jinan, Shandong aluminum products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead rolls in aluminum and you hand into the brilliant, for a better future!