Industrial processes and environmental protection
Galvanized steels; a surface treatment against corrosion

The industrial process uses surface preparation and rinsing baths which are controlled by quality plans. Controlling the baths involves measuring and adjusting their composition, in order to maintain optimum operation.

When the baths have reached a level of saturation with elements that are incompatible with the bath's function, they are recovered by external companies who ensure the complete recycling of these used baths.

Some industrial sites have in-line liquid effluent reprocessing plants. They operate in closed loops with surface treatment baths, adjusting their composition while eliminating pollutants. They operate by precipitating sludge, which is then recovered and recycled.

Zinc bath waste, ash and matte, are compounds with a high zinc content. They are recovered via a process that reuses the zinc in its...