EPI — Electrochemical Products, Inc. EPI has been a leader and innovator in the development and manufacture of chemicals for the metal plating and metal finishing industries. Our headquarters are located in New Berlin, a southwestern suburb of Milwaukee, Wisconsin. We are just 80 miles (130 km) north of Chicago, Illinois. We supply customers worldwide with an extensive line of products in the areas of electroplating, metal blackening, corrosion inhibitors, antiquing and oxidizing, metal clean...