Electrochemical prevention of marine biofouling on a novel titanium- nitride-coated plate formed by radio-frequency arc spraying

T. Nakayama, H. Wake, K. Ozawa, N. Nakamura, Tadashi Matsunaga

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Abstract

We have developed a new method for forming titanium-nitride(TiN)-coated plates using radio-frequency arc spraying (RFAS). A TiN coating formed by RFAS has been used for electrochemical prevention of marine biofouling. X- ray diffraction and X-ray photoelectron spectroscopy indicate that a TiN composite film containing Ti was formed on a polyethylene terephthalate plate surface when Ti was sprayed by RFAS under atmospheric pressure. A cyclic voltammogram (scan rate 20 mV/s) of the TiN formed by RFAS revealed no oxidative and reductive peak currents in the range -0.6 V to 1.2 V against a saturated silver/silver chloride (Ag/AgCl) electrode. When a potential of 1.0 V against Ag/AgCl was applied to the electrode in seawater, no dissolved Ti was detected. Changes in pH and the chlorine concentration were not observed in this range. In all, only 4.5% of the Vibrio alginolyticus cells attached to the electrode survived when a potential of 0.8 V against Ag/AgCl was applied in seawater for 30 min. In field experiments, attachment of the organisms to the TiN electrode was inhibited by applying an alternating potential of 1.0 V and -0.6 V against Ag/AgCl. The TiN film can be formed by RFAS on large and intricately shaped surfaces, and it is a practical electrode for the electrochemical prevention of fouling of various marine structures.

Original languageEnglish
Pages (from-to)502-508
Number of pages7
JournalApplied Microbiology and Biotechnology
Volume50
Issue number4
DOIs
Publication statusPublished - 1998
Externally publishedYes

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ASJC Scopus subject areas

  • Biotechnology
  • Applied Microbiology and Biotechnology

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