CORROSION DIAGNOSIS OF A GAS EVACUATION VENTILATOR IN A FERTILIZER PLANT

摘要

This work concerns a corrosion diagnosis of a ventilator used for the extraction of gases formed during the neutralization of phosphoric acid by ammonia; a step in the MAP and DAP production process. The ventilator, made by AISI316 austenitic stainless steel, was subject to severe corrosion, especially on its rotating parts (the impeller).