Surface micro-structuring of type 304 stainless steel by femtosecond pulsed laser: effect on surface wettability and corrosion resistance
- 84 Downloads
This paper presents results on femtosecond (fs) pulsed laser-based surface micro-structuring of type 304 stainless steel (304 SS). Post laser treatment surface wettability and corrosion resistance investigation are reported. SS sample surfaces have been micro-structured using a typical laser fluence of ~ 0.9 J/cm2 for varying sample scanning speed in the range 25–1000 µm/s. Dense array of micro-protrusions have been generated without formation of a crater for an optimized target scan speed exceeding 200 µm/s. Static water contact angle (WCA) measurement indicated super-hydrophilic behavior immediately after laser treatment. However, hydrophilicity (wettability) was found to decrease with storage time with sample becoming highly hydrophobic (WCA: 144° ± 5°) within 50 days after laser treatment. Corrosion resistance of the laser-treated samples was measured by potentio-dynamic polarization technique. Fs laser micro-structured SS has shown poorer corrosion resistance in comparison to pristine surface. Observed poorer corrosion resistance of laser-treated surface has been explained on the basis of surface chemical composition and surface roughness. The results demonstrated that corrosion resistance increased with increasing hydrophobicity of the SS surface.
The authors are thankful to Dr B. Viswanath, MSD, BARC for his help in SEM characterization.
- 13.S. Krishnan, J. Dumbre, S. Bhatt, E.T. Akinlabi, R. Ramalingam, Effect of crystallographic orientation on the pitting corrosion resistance of laser surface melted AISI 304L austenitic stainless steel. Int. J. Mech. Mechatronics Eng. 7(4), 650–653 (2013)Google Scholar
- 19.Q.Z. Zhao, F. Ciobanu, L.J. Wang, Self-organized regular array of carbon nano-cones induced by ultra short laser pulses and their field emission properties. J. Appl. Phys. 105, 083103, 1–4 (2008)Google Scholar
- 21.V.I. Emelyanov, Mechanism of laser induced self organization of nano and microstructures of surface relief in air and in liquid environment, in Laser ablation in liquids, ed. by G. Yang (Published by Panstanford Publishing Pte, Ltd., Singapore, 2012)Google Scholar
- 25.S.R.M. Mollabshi, K. Madanipour, Nanosecond laser surface patterning of bio grade 316L stainless steel for controlling its wettability characteristics. Int. J. Opt. Photon. 09(01), 43–52 (2015)Google Scholar
- 28.L.B. Boinovich, A.M. Emelyanenko, K.A. Emelyanenko, A.G. Domantovsky, A.A. Shiryaev, V. Ta, A. Dunn, T.J. Wasley, R.W. Kay, J. Stringer, P.J. Smith, C. Connaughton, J.D. Shephard, Comment on “Nanosecond laser textured superhydrophobic metallic surfaces and their chemical sensing applications” by Duong. Appl. Surf. Sci. 357, 248–254 (2015)CrossRefGoogle Scholar
- 29.O. Monnereau et al., Chromium oxides mixtures in PLD fils investigated by Raman spectroscopy, J. Optoelctron. Adv. Mater. 12(8), 1752–1758 (2010)Google Scholar
- 33.J. Jehlicka, H.G.M. Edwards, A. Oren, Raman Spectrosc. Microbial Pigments 80(11), 3286–3295 (2014)Google Scholar
- 36.Y.Z.F. Liu, J. Chen, Y. Yuan, Effects of surface quality on corrosion resistance of 316L stainless steel parts manufactured via SLM. J. Laser Appl. 29(2), 1–2 (2017)Google Scholar