TURI » TURI Publications » Case Studies » Metal Finishing and Plating  

Metal Finishing and Plating

River Street Metal Finishing filters acid to reduce chemical use

  River Street Metal Finishing, Inc., located in Braintree, Massachusetts, has been anodizing aluminum parts for the electronics, medical, military and defense, automotive and marine, firearms, and aerospace industries since 1991. By installing an acid filtration system on their three anodizing tanks, River Street Metal Finishing has been able to maintain a more consistent quality of its acid bath, reduce its use of sulfuric acid by 300 to 450 gallons per year, reduce its waste generation by 1,000 to 1,500 gallons per year, save an average of $4,555 per year on material and disposal costs, and improve worker safety. Download PDF file (758.80 kB)

Independent Plating - Trivalent Chromium Plating Conversion. 2012.

  Traditionally, metal finishing relies on the use of a number of toxic chemicals to achieve the performance requirements of its customers. Independent Plating recently converted a nickel plating line to accommodate a new technology that substitutes trivalent chromium for hexavalent chromium, a Higher Hazard Substance. This case study documents the company's decision-making process and the business case for making the change. Download PDF file (543.71 kB)

Columbia Manufacturing, Inc. - Plating Operation Achieves Zero Wastewater Discharge. OTA 2005.

  Columbia Manufacturing Inc. in Westfield, Massachusetts eliminated the use of 150,000 gallons of water per day in their plating operations. Columbia saved $80,000 in sewer fees, among other cost savings, by upgrading the plating equipment and integrating a zero discharge wastewater treatment system. The new, efficient plating line enables the company to recover and reuse 98% of the plating chemistry resulting in a drastic reduction of hazardous waste generation. Download PDF file (21.95 kB)

V.H. Blackinton & Co. - Halogen Solvent Elimination, Chemical Reduction and Zero Discharge. OTA 2003.

  In the early 1990's V.H. Blackinton began a continuous improvement program to reduce chemical use and eliminate certain hazardous chemicals. By engaging company employees and working with vendors, along with the help of the Office of Technical Assistance (OTA), V.H. Blackinton eliminated the use of ozone depleting Freon, trichloroethylene (TCE), ammonia, and volatile organic compounds (VOC). The company made substantial investments to modernize their plating and finishing operations, leading to significant reductions in water use and in the use of acids and bases in waste treatment and plating operations. As a result, V.H. Blackinton is no longer required to report under the Toxic Use Reduction Act (TURA) and have closed the loop on their wastewater discharge. Download PDF file (25.88 kB)