Corrosion resistance of VC-reinforced Fe-based SMA coatings by laser cladding

Lv, Yufang; Xu, Peng; Liang, Rou; Wang, Ling; Pang, Chi

doi:10.1016/j.surfcoat.2024.130457

Cited by 6 publications

(1 citation statement)

References 54 publications

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“…The frequency of breakpoints was also the highest at x = 0.2 (Figure b). In summary, this enhancement of the corrosion resistance likely stemmed from enhanced passivation film stability, thereby strengthening the barrier effect . Conversely, when x > 0.2, the emergence of a secondary phase heightened susceptibility to localized corrosion, thereby reducing the coating’s corrosion resistance.…”

Section: Resultsmentioning

confidence: 99%

Corrosion Behavior of Al-Containing CoNiV Medium Entropy Alloy Coating Fabricated by Laser Cladding

Fei,

Xu,

Zhang

et al. 2024

Langmuir

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CoNiV medium entropy alloys (MEAs) have been widely recognized for their superior corrosion resistance. Nonetheless, their extensive application has been hindered by high production costs and complex fabrication processes. In this study, CoNiVAl x MEA coatings were synthesized on AISI 304 stainless steel substrates via laser cladding technology. The microstructure, phase composition, corrosion resistance, and corrosion mechanisms of the coatings were systematically investigated by using advanced characterization techniques, including optical microscopy, scanning electron microscopy, transmission electron microscopy, X-ray diffractometry, and electrochemical workstation analysis. The ratio of O 2− /OH − in the passivation film of the coated surface exhibited a gradual increase with the addition of Al. The formation of the Alcontaining precipitated phase L2 1 was observed at x = 0.3 and 0.4. The results demonstrated that moderate Al doping (x ≤ 0.2) enhanced corrosion resistance by improving the stability of the passivation film and reducing the thermodynamic tendency toward corrosion. In contrast, excessive Al doping (x > 0.2) led to the formation of the L2 1 phase, which increased the susceptibility to localized corrosion, thus compromising the overall corrosion resistance.

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Section: Resultsmentioning

confidence: 99%

Corrosion Behavior of Al-Containing CoNiV Medium Entropy Alloy Coating Fabricated by Laser Cladding

Fei,

Xu,

Zhang

et al. 2024

Langmuir

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Facile Synthesis of Nanostructured Self‐Regenerative Superhydrophobic Coatings

Sharma,

Arora,

Grewal

2024

Adv Eng Mater

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The current study endeavors facile synthesis of robust nanostructured superhydrophobic coatings. Different feedstock materials (Cu, Al, Zn, SS316, NiCrCSiBFe) are coated using flame‐spraying at different spraying distances and constant pressure (1 bar). The surface modulation of flame‐sprayed coating is done using 1H,1H,2H,2H‐perfluorooctyltriethoxysilane (FOTES). The coating's topology alters from multi‐order hierarchal coral reef‐like morphology for Al and Zn to flattened topology for SS316 and NiCrCSiBFe. The size and density of nanostructures show significant transition with variation in feedstock and spraying distance. The analysis of particle‐laden flames shows characteristic variations in particle temperatures and velocity profiles. The morphological alternations are related to physiochemical characteristics, resulting in in‐situ particle vaporization and nucleation. Post silanization, Al and Zn coatings deposited at higher spraying distance show significant de‐wetting traits (θ > 155°) with lowest contact angle hysteresis and sliding angle (<5°). Coatings show extremely low adhesion of 2–4 μN with water droplets, which is considerably lower than lotus leaf (18 μN). Both coatings show extreme resilience in simulated rain, withstanding droplet impacts for more than 2 h without any loss of superhydrophobicity and outstanding abrasion resistance due to self‐regeneration behavior. The present study highlights a synthesis of a viable route for the development of robust superhydrophobic coatings for various applications.

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