Improvement of corrosion resistance of AA2024-T3 using femtosecond laser peening without protective and confining medium

Trdan, Uroš (author), Tomokazu, Sano (author), Klobčar, Damjan (author), Sano, Yuji (author), Grum, Janez (author), Šturm, Roman (author)

This work reports for the first time the effect of femtosecond laser shock peening (fLSP) without a sacrificial overlay under atmospheric conditions (no confinement) on the corrosion behaviour of AA2024-T3. After fLSP and additional exposure to air a superhydrophobic state (θ=160 ± 4°) is achieved. Moreover, fLSPed corrosion-resistant surface contributes to increased polarization resistance, reduced corrosion current and lower anodic dissolution, with long-term stability in aggressive chloride solution. Furthermore, SEM/EDS characterisation reveals reduction in pitting and complete eradication of intergranular corrosion (IGC) attack due to reduced metal/electrolyte contact area and homogeneous, refined microstructure which prevents chain-link IGC propagation.

• Language: English
• Keywords: aluminium, aluminium alloy 2024-T3, polarization, scanning electron microscope - SEM, intergranular corrosion, pitting corrosion
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Author Accepted Manuscript
• Submitted for review: 17.04.2018
• Article acceptance date: 07.08.2018
• Publication date: 14.08.2018
• Year: 2018
• Number of pages: Str. 46-55
• Numbering: Vol. 143
• PID: 20.500.12556/RUL-127264
• UDC: 620.1(045)
• ISSN on article: 0010-938X
• DOI: 10.1016/j.corsci.2018.08.030
• COBISS.SI-ID: 16218651
• Publication date in RUL: 01.06.2021

Record is a part of a journal

• Title: Corrosion science
• Shortened title: Corros. sci.
• Publisher: Pergamon Press
• ISSN: 0010-938X
• COBISS.SI-ID: 5881607

Licences

• License: CC BY-NC 4.0, Creative Commons Attribution-NonCommercial 4.0 International
• Link: http://creativecommons.org/licenses/by-nc/4.0/
• Description: A creative commons license that bans commercial use, but the users don’t have to license their derivative works on the same terms.
• Licensing start date: 01.10.2018

Secondary language

• Language: Slovenian
• Keywords: aluminij, aluminijeva zlitina 2024-T3, polarizacija, vrstični elektronski mikroskop - SEM, interkristalna korozija, jamičasta korozija

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0270
• Name: Proizvodni sistemi, laserske tehnologije in spajanje materialov