Current and potential distributions on a stainless steel propeller shaft protected by galvanic anodes were investigated by means of Finite Element Method (FEM) modelling. The effect of seawater flow and shaft rotation was evaluated. The results of simulations are compared with experimental measurements performed on steady shaft in natural seawater. Modest polarization can be noticed in all operating conditions, not sufficient for preventing biofilm action on localized corrosion initiation. Only in stagnant conditions, without any water renewal, the consumption of oxygen leads to an appreciable potential decreasing to match the limits of normal protection indicated in the European standards.
Cathodic protection modelling of a propeller shaft / Lorenzi, Sergio; Pastore, Tommaso; Bellezze, Tiziano; Fratesi, Romeo. - In: CORROSION SCIENCE. - ISSN 0010-938X. - ELETTRONICO. - 108:7(2016), pp. 36-46. [10.1016/j.corsci.2016.02.035]
Cathodic protection modelling of a propeller shaft
BELLEZZE, Tiziano
Writing – Review & Editing
;FRATESI, Romeo
2016-01-01
Abstract
Current and potential distributions on a stainless steel propeller shaft protected by galvanic anodes were investigated by means of Finite Element Method (FEM) modelling. The effect of seawater flow and shaft rotation was evaluated. The results of simulations are compared with experimental measurements performed on steady shaft in natural seawater. Modest polarization can be noticed in all operating conditions, not sufficient for preventing biofilm action on localized corrosion initiation. Only in stagnant conditions, without any water renewal, the consumption of oxygen leads to an appreciable potential decreasing to match the limits of normal protection indicated in the European standards.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
