Dow 19 Chromic Acid Coating
Chromic acid, also known as Dow 19, is a treatment that is used on magnesium parts that need a spot touch-up to repair minor damage or a temporary coating to prevent corrosion between production processes. Parts can be coated with Dow 19 by manual application or by immersion in a tank of Chromic Acid. After Dow 19 coating, parts appear to be a brassy brown color but can vary slightly depending of the alloy. There is no appreciable dimensional change to the component from the Chromic Acid process.