Toxicity of hydrogen peroxide produced by electroplated coatings to pathogenic bacteria

Zhi Hong Zhao, Yoshikazu Sakagami, Tetsuya Osaka

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The ability of various electroplated coatings (cobalt, zinc, copper, and cobalt-containing alloys of nickel, zinc, chromium, etc.) to inhibit the growth of pathogenic bacteria (Gram-positive bacteria Enterococcus faecalis and methicillin-resistant Staphylococcus aureus and Gram-negative bacteria Escherichia coli, Pseudomonas aeruginosa, and Klebsiella pneumoniae) was determined by a drop-method antibacterial experiment. The amounts of H2O2 produced and metal ions dissolved from the surfaces of various electroplated coatings were measured and it was found that the inhibitory ability of coatings corresponded to the amounts of H2O2 produced. The more significant the inhibition of the coating to bacterial growth, the greater the amount of H2O2 production. In addition, the bacterial survival rates on the surfaces of coatings were almost zero when H2O2 was produced in amounts greater than 10-6 mmol/cm2. However, the dominant concentrations of metal ions dissolved from coatings were outside of the bacterial lethal range.

Original languageEnglish
Pages (from-to)441-447
Number of pages7
JournalCanadian Journal of Microbiology
Volume44
Issue number5
DOIs
Publication statusPublished - 1998 Jan 1

Keywords

  • Electroplated coatings
  • Hydrogen peroxide
  • Inhibitory ability
  • Pathogenic bacteria

ASJC Scopus subject areas

  • Microbiology
  • Immunology
  • Applied Microbiology and Biotechnology
  • Molecular Biology
  • Genetics

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