TY - JOUR
T1 - Marine biofouling of titanium alloys in the coral reef environment
AU - Greenberg, T.
AU - Itzhak, D.
N1 - Publisher Copyright:
© 2002 by NACE International.
PY - 2002/1/1
Y1 - 2002/1/1
N2 - Early stage biofouling phenomena on titanium alloys - electrochemical passive metals, was tested in the coral reef environment in the Red Sea, Aquaba gulf at the shores of Eilat. Titanium alloys: UNSR50400, UNSR52400 and UNSR53400 were exposed to the reef environment at a depth of 6 m. for a month, during December 2000. Settlements of vireos marine organisms were observed on all the exposed samples. Potentiodynamic polarization measurements show that after exposure to the environment samples exhibit improved passivation characteristic. The passivatiom current density decreased in about two orders of magnitude in all the samples tested. UNSR52400 exhibit an effective cathodic depolarization after exposure to the coral reef environment that results in a higher corrosion potential. Microscopic observations reveal various chromista settlements especially diatoms. It is suggested that during the early stages of exposure pH conditions, on the surface of the Ti alloys encourage settlements of organisms that deposit silica skeleton, such as diatoms.
AB - Early stage biofouling phenomena on titanium alloys - electrochemical passive metals, was tested in the coral reef environment in the Red Sea, Aquaba gulf at the shores of Eilat. Titanium alloys: UNSR50400, UNSR52400 and UNSR53400 were exposed to the reef environment at a depth of 6 m. for a month, during December 2000. Settlements of vireos marine organisms were observed on all the exposed samples. Potentiodynamic polarization measurements show that after exposure to the environment samples exhibit improved passivation characteristic. The passivatiom current density decreased in about two orders of magnitude in all the samples tested. UNSR52400 exhibit an effective cathodic depolarization after exposure to the coral reef environment that results in a higher corrosion potential. Microscopic observations reveal various chromista settlements especially diatoms. It is suggested that during the early stages of exposure pH conditions, on the surface of the Ti alloys encourage settlements of organisms that deposit silica skeleton, such as diatoms.
UR - http://www.scopus.com/inward/record.url?scp=85046796908&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:85046796908
VL - 2002-April
JO - NACE - International Corrosion Conference Series
JF - NACE - International Corrosion Conference Series
SN - 0361-4409
T2 - Corrosion 2002
Y2 - 7 April 2002 through 11 April 2002
ER -