Effect of Dissolved Oxygen on Corrosion of 20R Steel in Bio-diesel Reactor Raw Mixture

The corrosion characteristics of 20R carbon steel in frying oil and waste water mixture umder the conditions of dissolved and deoxidized oxygen were studied by means of mass loss method,EIS and polarization curve method.The results indicated that the corrosion of 20R carbon steel in flowing frying oil and waste water mixture was controlled by the xathodic oxygen depolarization,flowing type and dissolved oxygen.The corrosion rate increased greatly with the increase of dissolved oxygen.The corrosion rate under the dissolved oxygen condition was about 8 times of that under the deoxidized condition.