EN.pdf

The Good Practice Sheet for Uses of Chromates provides guidance on reducing exposure to chromates during the passivation of tin plated steel (ETP) and electrolytic chromium coated steel (ECCS) processes. Key points include:
- The process involves an aqueous sodium dichromate solution and is fully automated and contained.
- Equipment design features include local exhaust ventilation (LEV) to remove sodium dichromate mist, closed circuits for the sodium dichromate electrolyte and rinsate, and restricted access to the plating cell.
- Risk management measures for workers include electrically interlocked control systems, regular testing of LEV, and regular inspection and rinsing of equipment to remove residual chromates.
- Risk management measures for the environment include air extraction systems with filtration or scrubber units, treatment of wastewater containing hexavalent chromium, and regular maintenance of floors, drains, and equipment.
- Personal protective equipment (PPE) includes protective eye goggles and acid-resistant clothing and footwear.
- Training and supervision are essential for all persons with access to the plating line, and monitoring should be carried out at least annually to ensure exposure and environmental release are maintained at a low level.