The effect of atmospheric plasma paint stripping on the fatigue crack growth properties of aluminium substrates

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DOIResolve DOI: http://doi.org/10.4236/jmmce.2017.54014
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TypeArticle
Journal titleJournal of Minerals and Materials Characterization and Engineering
ISSN2327-4077
2327-4085
Volume5
Issue4
Article number77165
Pages161173
Subjectatmospheric plasma; paint stripping; fatigue life; topcoat; primer; non-destructive testing (ndt); fatigue cracks; aerospace; aluminium alloys
AbstractPaint removal is a common maintenance requirement for aircraft as well as naval and land vehicles, since external paint gets damaged and loses much of its corrosion protection effectiveness with time. Paint removal is also conducted when metallic aircraft structures are inspected periodically for fatigue cracks and corrosion. The conventional methods of removing paint employed throughout the Canadian Forces mainly include chemical stripping and abrasive media blasting. Chemical stripping involves the use of hazardous chemicals, which are high in Volatile Organic Compounds (VOC) and Hazardous Air Pollutants (HAP). Abrasive media blasting typically results in a substantial quantity of solid waste consisting of paint and blast residues. Such waste is subject to control under increasingly stringent environmental and safety regulations and its disposal is costly. The new Atmospheric Plasma (AP) paint removal process purports to be a high chemical energy, low thermal energy (cold plasma process), that should not damage temperature sensitive substructures, such as heat treated aerospace aluminium alloys. Fatigue strength is one of the key properties in aircraft structures. In order for AP paint stripping to be accepted as an aerospace industry standard paint removal process, it must be thoroughly tested to demonstrate that it does not adversely affect the fatigue properties of the substrate. This paper investigates effect of the paint removal process on fatigue crack growth of 7075-T6 and 2024-T3 aluminium panels.
Publication date
PublisherScientific Research Publishing
LanguageEnglish
AffiliationAerospace; National Research Council Canada
Peer reviewedYes
NPARC number23002251
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Record identifier0814d600-7597-4efd-b7c2-73472062e3fd
Record created2017-09-14
Record modified2017-09-14
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