Accession Number:

AD1008652

Title:

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

Descriptive Note:

Technical Report,01 Jan 2015,31 Dec 2015

Corporate Author:

US Army Research Laboratory Aberdeen Proving Ground United States

Personal Author(s):

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

Report Date:

2016-05-01

Pagination or Media Count:

24.0

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.

Descriptors:

• corrosion
• magnesium alloys
• coatings
• modification

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE