Many hot-dipped galvanising lines (HDGL) tend to over-coat zinc and other coatings because the process control system is unable to compensate for strip oscillation and camber at the air knives, and hence cannot accurately control coating thickness. To ensure the guaranteed minimum thickness is achieved, the average thickness is higher than actually needed, so ‘wasting’ raw materials. EMG has developed EMG eMASS®, an electromagnetic system to stabilise the strip between the air knives after the zinc pot which both reduces coating consumption and improves strip coating quality. The system can be retrofitted or installed as part of a new build. Approximately 50 units are in operation worldwide.