Marine biofouling of titanium alloys in the coral reef environment

T. Greenberg, D. Itzhak

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Early stage biofouling phenomena on titanium alloys, electrochemical passive metals, were tested in the coral reef environment off the shores of Eilat in the Gulf of Aqaba in the Red Sea. Titanium alloys - UNSR50400, UNSR 52400 and UNSR53400 - were exposed to the reef environment at a depth of 6 m for the month of December 2000. Settlements of various marine organisms were observed on all the exposed samples. Potentiodynamic polarization measurements show that after exposure to the environment samples exhibit improved passivation characteristics. The passivation current density decreased by about two orders of magnitude in all the samples tested. UNSR52400 exhibits an effective cathodic depolarization after exposure to the coral reef environment that results in a higher corrosion potential. Microscopic observations revealed 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 skeletons, such as diatoms.

Original languageEnglish
Pages (from-to)405-413
Number of pages9
JournalCorrosion Reviews
Volume23
Issue number4-6
DOIs
StatePublished - 1 Jan 2005

Fingerprint

Dive into the research topics of 'Marine biofouling of titanium alloys in the coral reef environment'. Together they form a unique fingerprint.

Cite this