Aterian Investment Partners, a private-equity investment firm, announced that one of its affiliates completed the carve-out acquisition of 10 heat-treating facilities in the U.S. and Canada from Bluewater Thermal Solutions. The acquired plants will continue to operate under the Bluewater name. Bluewater is a leading provider of heat-treating services and solutions to a number of North American manufacturing industries. The company has locations in Michigan, Illinois, Indiana, Pennsylvania and Canada. Last week, Bluewater sold Carolina Commercial Heat Treating to Bodycote.