Electrochemical Behavior of Titanium in Saline Media Containing alga Dunaliella Salina and Its Secretions

摘要

The present work shows how to make use of cell biology in corrosion control of technical titanium inhighly saline solutions. Besides, it opens the door towards correlating cell secretions with corrosionparameters when live cells are adsorbed on the surface. Generally, the corrosion current density (jcorr,2 A/cm ) decreases in media containing alga Dunaliella Salina over the density range of 蟻c = 0.1- 51.010 cell/ml and then appears to approach a stabilized value. Results on the effect of glycerol andarotene secreted by the alga revealed that glycerol has no effect on the corrosion performance oftechnical titanium, while arotene can effectively mitigate the dissolution process of the sample. The2 increase in the total resistance (Rt/ cm ) of the film assigns the inhibition extent due to sealing effectof the surface by arotene molecules and hence higher corrosion resistance for titanium. Theinhibition mechanism is likely occurred via physical adsorption on the electrode surface followingTemkin isotherm.