Laser surface modifications of Fe-14Cr ferritic alloy for improved corrosion performance

Laser processing parameters of an ytterbium fiber laser were explored using a two-stage searching strategy to form an optimum surface layer on Fe-14Cr ferritic alloy samples for improved corrosion performance. With one or two passes of laser surface scanning, corrosion behavior and surface layer uni...

Full description

Saved in:
Bibliographic Details
Published in:Surface & coatings technology 2020-01, Vol.381, p.125194, Article 125194
Main Authors: Hemmasian Ettefagh, Ali, Wen, Hao, Chaichi, Ardalan, Islam, Md Imdadul, Lu, Fengyuan, Gartia, Manas, Guo, Shengmin
Format: Article
Language:English
Subjects:
Corrosion
Corrosion rate
Ferritic alloy
Fiber lasers
Laser
Laser processing
Lasers
Oxidation
Process parameters
Protective coating
Saline water
Scanning
Surface layers
Surface modification
Surface scanning
Ytterbium
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Laser processing parameters of an ytterbium fiber laser were explored using a two-stage searching strategy to form an optimum surface layer on Fe-14Cr ferritic alloy samples for improved corrosion performance. With one or two passes of laser surface scanning, corrosion behavior and surface layer uniformity were investigated for different laser parameters utilizing energy-dispersive X-ray spectroscopy (EDS) and electrochemical tests in saltwater. The optimum laser processing parameters were found to be 175 w of laser power, 200 mm/s of scanning speed, and 0.025 mm of hatching space. Corrosion behavior of laser-treated samples with the optimum laser parameters was found to be 5 and 13 times better respectively than the baseline sample in 3.5 wt% NaCl water solution, in term of corrosion rate. The formation of a uniform thin oxidation layer was the main reason for the improved corrosion performance. [Display omitted] •Optimum laser parameters were obtained for the formation of a uniform surface oxide protective coating on Fe-14Cr.•Laser parameters were manipulated to produce the most uniform protective layer on the alloy surface.•For the optimized set, the formed protective coating decreased the corrosion rate by almost 90%.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2019.125194