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Corrosion behavior of Al2024‐T3, Al5052‐H32, and Al6061‐T6 aluminum alloys coated with DLC films in aviation fuel medium, Jet A‐1 and AVGAS 100LL
Author(s) -
Macário Paulo F.,
Vieira Angela,
Manfroi Lucas,
da Silva Michely G. P.,
Leite Priscila,
Vieira Lucia
Publication year - 2019
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201911035
Subject(s) - corrosion , materials science , aluminium , immersion (mathematics) , metallurgy , surface finish , surface roughness , diamond like carbon , aviation fuel , composite material , thin film , nanotechnology , mathematics , pure mathematics , aerospace engineering , engineering
In aircraft and storage fuel tanks, many environmental corrosion factors can be present, which can cause breakdown to the passive film of aluminum causing severe localized corrosion. Aiming to a solution to this problem, diamond‐like carbon (DLC) films were deposited on substrates Al 2024‐T3, Al 5052‐H32, and Al 6061‐T6. The substrates with and without DLC films were submitted to a corrosive immersion test with aviation fuel Jet‐A1 and AVGAS 100LL. The surface morphology from aluminum substrates with and without DLC films was analyzed before and after 7 and 30 days of corrosive immersion tests by SEM. The adhesion of the DLC films was evaluated according to the ASTM‐C1624 scratching test standard, and the optical profilometry was used to measure the thickness and roughness. Silver nanoparticles were also added in DLC films samples due to its antibacterial properties to check the stability and resistance against corrosive fuel medium. The results indicated an improvement of corrosion resistance just with DLC films. The silver nanoparticles did not present any advantages in this corrosion protection, and the aluminum alloys suffered more corrosion than when protected by DLC films.