Evaluation of Al-Zn-In Alloy for Galvanic Cathodic Protection of Bridge Decks

The objective of this Innovations Deserving Exploratory Analysis (IDEA) project was to develop a galvanic mesh anode for bridge deck application. The concept was to develop an expanded mesh or perforated sheet that would last at least 25 years, be durable for construction, not interfere with concrete overlay bonding and be of a size that is practical for transportation and field installation. The final form consisted of thermally sprayed anode material on an aluminum mesh or a sheet that was subsequently expanded to form a mesh. Laboratory trials showed that the Al-Zn-In alloy was an effective anode in providing cathodic protection to concrete embedded rebar. A limited bridge trial was conducted that further proved the constructability and effectiveness of the anode. However, problems were encountered that caused the project to be halted pending further research that is beyond the intent of the program. These problems included limited availability of a suitable substrate alloy, gas generation and delamination of the overlay at the anode.

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  • Supplemental Notes:
    • This NCHRP-IDEA project was conducted by Corrpro Companies, Incorporated, West Chester, Pennsylvania. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
  • Authors:
    • Young, Walter T
    • Firlotte, Clem
    • Funahashi, Miki
  • Publication Date: 2009-8


  • English

Media Info

  • Media Type: Print
  • Edition: Final Report
  • Features: Figures; Photos; Tables;
  • Pagination: 16p
  • Serial:
  • Publication flags:

    Open Access (libre)

Subject/Index Terms

Filing Info

  • Accession Number: 01141682
  • Record Type: Publication
  • Report/Paper Numbers: Highway IDEA Project 100
  • Files: TRIS, TRB
  • Created Date: Oct 12 2009 8:31AM