The Use of Nanoporous Oxide Coatings on Steel Strand for Decreased Corrosion and Improved Adhesion

Quarterly Reports Other Documents Final Report
March 2013

Primary Investigators

Marc Anderson
University of Wisconsin-Madison
Dept. of Civil & Environmental Engineering
nanopor@wisc.edu

Abstract

The effect on corrosion resistance of inorganic nanoparticle coatings on steel strand used in transportation infrastructure is studied by means of electrochemical methods. The strand is coated with ZrO2 and TiO2 sol-gels by dip coating process. Linear Polarization measurements of bare and coated strand are taken and analyzed to obtain an optimum coating process. The steel-concrete bond of coated strand is evaluated through small-scale pull-out tests of sire embedded in mortar cylinders. Lastly, the effect on the mechanical behavior of the strand due to the coating process is assessed by the mechanical properties obtained from tension tests of treated versus untreated wire.

Objectives

Develop and prove that nanoporous oxide coatings will improve the corrosion resistance of steel strand used in transportation structures while improving the chemical adhesion of the steel strand to concrete.

Tasks

  1. Prepare ZrO2 and TiO2 oxide coatings
  2. Pre-treat steel samples for coating process and proceed to coat
  3. Perform Linear Polarization tests on bare and coated strand to obtain the pitting corrosion potential
  4. Carry-out pull-out tests on bare and coated strand using a small-scale custom setup
  5. Obtain the mechanical properties of the steel through tension tests
  6. Using these results market the viability of the product

Project Information

  • Duration: 12 months
  • Dates: September 1, 2012 – August 31, 2013
  • Budget: $60,000
  • Student Involvement: One graduate student
  • Modal Orientation: Highway
  • Project ID: CFIRE 06-07
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