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Merit Partnership Case Studies: Chapter 03: Cooling System for Hard Chrome Electroplating

Chapter Abstract: This is clip 3 of 5 for this video. Regulations mandated that uncontrolled Chrome air emissions be reduced by 95% to 99.8%. Prior to this regulation, most facilities used air bubblers to provide agitation and circulation to the bath. To follow the regulations, most facilities removed the air bubblers and floated foam balls on the surface of the bath. This generated a heating and circulation problem resulting in rejected parts. Then facilities installed cooling coils, which still left a circulation problem. Microplate Company, Inc. of Englewood, California designed and installed an external cooling unit that also provides circulation in tanks that must use foam. The bath is continually pumped through a heat exchanger where it is cooled and pumped back into the tank. The cooling water is circulated into a cooling tower on the roof of the facility.
Author: US EPA Region IX / MFASC / CMTC
Publication Date: 1997

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