Measurement of Adhesion Properties Between Topcoat Paint and Metallized/Galvanized Steel with 'Surface Energy' Measurement Equipment

For many highway transportation products, a zinc coating is added to the structural steel to act as a sacrificial layer for corrosion protection. Zinc is applied to steel in three ways - by zinc-primer paint, by metallizing (where hot zinc is sprayed onto the steel surface), or by galvanizing (where the steel part is immersed in a molten zinc bath and a zinc layer metallurgically forms on the steel). Paint topcoats are often applied to zinc-coated steel surfaces to provide additional protection and an aesthetic color finish. The adhesion performance of these topcoats appears to vary considerably for coatings applied over galvanizing versus metallizing. The effectiveness of different zinc coatings with topcoat paint applications can be quantified by measuring adhesion properties between the topcoat paint and zinc-coated steel. Measurement of these adhesion properties is the primary objective of this research. The objectives of this study are to: 1. Compare the adhesion properties of NEPCOAT-approved topcoat paint over metallizing to topcoat paint over galvanizing using specialized "surface-energy" measuring lab methods. As a control the adhesion properties of topcoat paint over zinc primer painted steel substrates will also be measured. 2. Investigate various factors affecting the adhesion of topcoat paint over galvanizing. 3. Report and recommend practices which produce the best adhesion of NEPCOAT-approved topcoat paints over metallized and particularly galvanized steel surfaces. Examine Surface cleaning, phosphating vs. wash primer.

Language

  • English

Project

  • Status: Completed
  • Funding: $125000.00
  • Contract Numbers:

    NETC 05-5

  • Sponsor Organizations:

    New England Transportation Consortium (NETC)

    University of Vermont
    Burlington, VT  United States  05405
  • Project Managers:

    Hanaway-Corrente, Amanda

  • Performing Organizations:

    University of Rhode Island, Kingston

    Department of Civil and Environmental Engineering
    Kingston, RI  United States  02881
  • Principal Investigators:

    Lee, Kang-Won

    Yang, Sze

  • Start Date: 20080301
  • Expected Completion Date: 0
  • Actual Completion Date: 20140905
  • Source Data: RiP Project 18329

Subject/Index Terms

Filing Info

  • Accession Number: 01537406
  • Record Type: Research project
  • Source Agency: New England Transportation Consortium (NETC)
  • Contract Numbers: NETC 05-5
  • Files: RiP
  • Created Date: Sep 13 2014 1:01AM