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A Two-Step Femtosecond Laser-Based Deposition of Robust Corrosion-Resistant Molybdenum Oxide Coating
Ali, Asghar Piatkowski, Piotr Nawaz, Tahir Ahmad, Shahbaz Ibrahim, Taleb Khamis, Mustafa Alnaser , Ali S.
Ali, Asghar
Piatkowski, Piotr
Nawaz, Tahir
Ahmad, Shahbaz
Ibrahim, Taleb
Khamis, Mustafa
Alnaser , Ali S.
Date
2023-01-18
Advisor
Type
Article
Peer-Reviewed
Published version
Peer-Reviewed
Published version
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Description
Abstract
A two-step femtosecond-pulsed laser deposition (fs-PLD) process is reported for the rapid development of uniform, poreless, crack-free, and well-adhering amorphous coatings of source materials with a high melting point. The first step comprises a high-rate raw deposition of the source material via fs-PLD, followed by a second step of scanning the raw sample with fs laser pulses of optimized fluence and scan parameters. The technique is applied to develop substoichiometric molybdenum oxide (MoOx, x < 3) coatings on mild steel. The thickness of the layer was ~4.25 μm with roughness around 0.27 μm. Comprehensive surface characterization reveals highly uniform and relatively moderate roughness coatings, implying the potential of these films as robust corrosion-resistant coats. Corrosion measurements in an aqueous NaCl environment revealed that the coated mild steel samples possess an average corrosion inhibition efficiency of around 95% relative to polished mild steel.