Transition from superhydrophilic to superhydrophobic state of laser textured stainless steel surface and its effect on corrosion resistance

Trdan, Uroš (author), Hočevar, Matej (author), Gregorčič, Peter (author)

This work investigates the evolution from superhydrophilic to superhydrophobic surface state on corrosion behaviour of SS316L produced by Nd:YAG nanosecond direct laser texturing (DLT). Results confirm perfect correlation among wettability and corrosion, hence superhydrophobic surface with a contact angle of 168 +/- 3.0° reflects in enhanced passivity, lower anodic dissolution and corrosion current reduction. Characterization of the corrosion attack by 3D microscopy reveals high sensitivity of superhydrophilic surfaces on corrosion propagation direction in regard to the laser beam passage (90°/0°). However, this trend completely diminishes with superhydrophobic development. Further, DLT also completely prohibits intergranular corrosion detected with the non-processed sample.

• Language: English
• Keywords: stainless steel, polarization, SEM, intergranular corrosion, passivity, 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
• Year: 2017
• Number of pages: Str. 21-26
• Numbering: Vol. 123
• PID: 20.500.12556/RUL-105525
• UDC: 620.178.3:621.7(045)
• ISSN on article: 0010-938X
• DOI: 10.1016/j.corsci.2017.04.005
• COBISS.SI-ID: 15482907
• Publication date in RUL: 04.12.2018

Record is a part of a journal

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

Secondary language

• Language: Slovenian
• Keywords: lasersko teksturiranje, nerjavno jeklo, polarizacija, interkristalna korozija, pasivacija, jamičasta korozija

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0392, P2-0132, P2-0270
• Name: Optodinamika, Fizika in kemija površin kovinskih materialov, Proizvodni sistemi, laserske tehnologije in spajanje materialov