The effect of laser shock peening with and without protective coating on intergranular corrosion of sensitized AA5083

0553424 - FZÚ 2023 RIV GB eng J - Journal Article
Kaufman, Jan - Racek, Jan - Cieslar, M. - Minárik, P. - Steiner, M.A. - Mannava, S.R. - Vasudevan, V.K. - Sharma, A. - Böhm, Marek - Brajer, Jan - Pilař, Jan - Pína, L. - Mocek, Tomáš
The effect of laser shock peening with and without protective coating on intergranular corrosion of sensitized AA5083.
Corrosion Science. Roč. 194, Jan. (2022), č. článku 109925. ISSN 0010-938X. E-ISSN 1879-0496
R&D Projects: GA MŠMT EF15_006/0000674
EU Projects: European Commission(XE) 739573 - HiLASE CoE
Grant - others:OP VVV - HiLASE-CoE(XE) CZ.02.1.01/0.0/0.0/15_006/0000674
Institutional support: RVO:68378271
Keywords : aluminum * magnesium * cyclic voltammetry * polarization * intergranular corrosion * passivity
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 8.3, year: 2022
Method of publishing: Open access

Laser Shock Peening with (LSP) and without protective coating (LPwC) was applied to sensitized AA5083 followed by electrochemical analysis. Potentiodynamic tests indicated a region of increased passivity for the LPwC samples with lower corrosion current. Similarly, significantly reduced intergranular corrosion rate was observed during potentiostatic polarization after LPwC treatment while LSP samples showed only a negligible improvement. The results are attributed to the unique recast surface layer composed of a modified oxide film followed by an embedded oxygen-rich aluminum nanoparticles sub-surface layer without grain boundary β-phase created during laser pulse interaction with the surface when no coating was applied.

Permanent Link: https://hdl.handle.net/11104/0339438