Corrosion-Mitigating, Bondable, Fluorinated Barrier Coating for Anodized Magnesium

Abstract

Enhanced barrier protection of magnesium (Mg) alloy AZ31B was achieved by coating oxidized Mg AZ31B H24 substrates with a perfluorinated silane. Then an atmospheric plasma treatment was used to promote adhesion of an epoxy topcoat to the silanized surface. This multistep process provides enhanced corrosion protection versus the untreated oxide as a result of accelerated corrosion testing via ASTM B117 (not shown) and electrochemical impedance spectroscopy. The adhesion of a top coat to this perfluorinated surface has been achieved and was tested using pull-off adhesion as described in ASTM D4541. Experimental work is ongoing for other anodized surfaces, various self-assembled monolayers, and alternative atmospheric plasma conditions.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2016
Accession Number
AD1008652

Entities

People

  • Joseph P. Labukas
  • Lindsey M. Blohm
  • Noelle F. Landers
  • Thomas Parker
  • Victor Rodriguez-santiago

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Biomedical
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Adhesion
  • Barometric Pressure
  • Barrier Coatings
  • Coatings
  • Corrosion
  • Corrosion Resistance
  • Elements
  • Failure Mode And Effect Analysis
  • Free Energy
  • Hydrophobic Properties
  • Impedance
  • Magnesium
  • Materials
  • Measurement
  • Self Assembled Monolayers
  • Spectroscopy
  • Substrates

Fields of Study

  • Materials science

Readers

  • Electrochemical Surface Science
  • Materials Science and Engineering.
  • Surface Coatings Technology.