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Electrochemical studies with Tin Electrode in Arabian Gulf sea water
Author(s) -
AlSuhybani A. A.,
AlMayouf A. M.
Publication year - 1996
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.19960270608
Subject(s) - tin , horizontal scan rate , electrochemistry , anode , electrode , scanning electron microscope , analytical chemistry (journal) , chemistry , polarization (electrochemistry) , chloride , diffusion , materials science , mineralogy , inorganic chemistry , chemical engineering , metallurgy , cyclic voltammetry , composite material , thermodynamics , environmental chemistry , physics , engineering
The electrochemical behaviour of commercial tin anodes in sea water at different scan rates, pHs, temperatures and in the presence of some additives has been investigatesd. Open circut potentials (OCP), linear polarization (R p ) and potentiodynamic measurements revealed that the behaviour is dependent on the above mentioned conditions. The plot of critical current density (Cd) vs. the square root of the scan rate (SR) gave a straight line with positive slope and passing through the origin indicating diffusion kinetics for the anode film formation. The analysis of data in neutral sea water and Cl − solutions leads to the conclusion that the film is formed from tin oxides and/or hydroxides. The morphology of the electrode surface was found to be dependent on the operating conditions as the scanning electron microscopy studies suggested. On the other hand EDX analysis showed different amounts of chloride on the surface layer depending on pH. The O 2 evolution was not observed upto 3.5 V (SCE).