Some Aspects on the Discoloration and Antimicrobial Property of a Thermally Passivated Copper Surface in a Highly Humid Environment

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  • Yeh An-Chou
    Metal Processing R&D Department, Metal Industries Research & Development Centre (MIRDC)
  • Huang Chin-Chuan
    Metal Processing R&D Department, Metal Industries Research & Development Centre (MIRDC)
  • Hsiao Chih-Chen
    Metal Processing R&D Department, Metal Industries Research & Development Centre (MIRDC)
  • Chu Te-Wei
    National Taipei University of Technology
  • Yang Yung-Chin
    National Taipei University of Technology
  • Feng Yi-Wei
    National Taipei University of Technology
  • Lin Kun-Yi
    National Taipei University of Technology

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Abstract

Copper is being considered for touch surfaces applications, such as bathroom accessories, because of their antimicrobial property, which can potentially reduce infection transmission. Since thermal passivation method is widely applied on surface of copper to produce color for decorative purpose, bathroom and toilet interior designers are interested in knowing the property of passivated copper surface in high humidity environment. The present study investigates the discoloration and antimicrobial property of a thermally passivated surface of copper against Escherichia coli (E. coli) bacteria. The spectral colorimeter analysis has been conducted to evaluate the degree of surface discoloration, XRD analysis has been conducted to identify the phases on the surface, a method based on JIS Z 2801: 2000 has been utilized to evaluate the colony forming unit (CFU) of E. coli on sample surface.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 52 (2), 265-267, 2011

    The Japan Institute of Metals and Materials

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