German company Decker has introduced the compact manually operated Lynx anodising system that will enable aluminium component manufacturers to become independent of surface finishing subcontractors.
Following mechanical machining of the parts, the Lynx system is capable of performing all the steps in the anodising process. First the workpieces, attached to aluminium or titanium holders to ensure they are exposed to the flow in the various baths as evenly as possible, are suspended in a cleaning bath at a temperature of 50 to 60ºC for de-greasing. This is followed by pickling in a sodium hydroxide solution to remove the natural oxide layer from the aluminium surfaces and to prepare the material for subsequent anodising.
The actual anodising process is performed using the GS method in a sulphuric acid solution. Then the workpieces can be rinsed to remove acid residue and dyed. Finally, remaining open pores in the workpieces are closed and sealed in a bath at a temperature of over 96ºC.