Powder coating, painting, chromate conversion and anodizing are common ways to finish die cast parts to improve their performance or appearance. In some die casting applications, components must also be made pressure tight to hold pressurized fluid or gases. Companies use vacuum impregnation to meet these requirements. This is a process that seals any internal leak paths, which are created during the casting process, without impacting any other features of the casting. A common question asked about vacuum impregnation is: Should vacuum impregnation be done before or after finishing?
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