Laserfiche WebLink
anodizing Aluminum <br />First of all, in the last 33 years Professional Welding Inc has never used this <br />type of application. We consider anodizing extremely hazardous, toxic and <br />against our ideas of keeping a safe environment It involves combinations of <br />sulfuric, phosphoric and chromic acids. Moreover; aluminum metal is highly <br />reactive to oxygen, but in the presence of air it spontaneously and rapidly <br />forms a tough resistant film of aluminum oxide, which protects the bulk of <br />the metal from corrosion. The oxide film can be enhanced, and its properties <br />changed, by anodization. Anodization is a process in which the aluminum is <br />made the anode of an electrolysis cell using an aqueous acid electrolyte for a <br />few minutes at low current densities. In other words, when the acid or acids <br />are placed in the aluminum it artificially grows its own oxide to an even <br />controlled thickness. This anodic thickness is not a surface coating, but it is <br />integral with the metal so a cut through it will not allow corrosion to creep <br />between the metal and oxide. <br />