Journal
CORROSION SCIENCE
Volume 149, Issue -, Pages 108-122Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2018.10.021
Keywords
Aluminium alloy; EIS; Polarisation; SEM; XPS; Neutral inhibition
Funding
- Slovenian Research Agency [P2-0393, P1-0134]
- Slovenian Research Agency (project Lightweight alloys based on aluminium as materials with increasing potential in transport industry) [J1-6437]
- Friuli Venezia Giulia Autonomous Region through the European Social Fund
- Talents3 fellowship programme
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The synergistic or adverse effects of the addition of NaOAc, NaNO3 and Na2SO4 on the performance of cerium (III) acetate as inhibitor of corrosion of aluminium alloy 7075-T6 in 0.1 M NaCl were investigated. The corrosion properties were evaluated using electrochemical polarisation and impedance methods. The composition and morphology of scribed samples during a 1-month immersion test were characterised using morphological and chemical analyses. The influence of additional salts on cerium precipitation was confirmed by acid-base titration. The most efficient long-lasting corrosion inhibition was achieved by synergism between Ce(OAc)(3) and Na2SO4 and ascribed to low solubility of the product formed.
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