Effects of Al/Ti Additions on the Corrosion Behavior of Laser-Cladded Hastelloy C276 Coatings DOI Open Access
Y. Chen, Rong Peng, Xin Fang

и другие.

Coatings, Год журнала: 2025, Номер 15(6), С. 678 - 678

Опубликована: Июнь 4, 2025

This study investigates the effects of aluminum (Al) and titanium (Ti) additions on porosity, microstructure, corrosion performance Hastelloy C276-based coatings fabricated via laser cladding nodular cast iron substrates. Nickel-based alloy powders blended with varying Ti (1–10 wt.%) Al (0.5–2.5 contents were deposited under optimized parameters. Microstructural characterization revealed that addition refined grain structure promoted formation TiC phases, while dispersed eutectic networks into isolated island-like structures. Both elements effectively suppressed porosity by reducing gas entrapment during solidification. However, excessive (10 induced brittle fracture due to agglomeration, caused interfacial cracks owing Al2O3 formation. Electrochemical tests in a 3.5 wt.% NaCl solution indicated Al/Ti enhanced initial passivation but reduced resistance weakened oxide film stability. XPS analysis Al-enriched formed Al(OH)3, whereas Ti-modified developed TiO2 TiC, both influencing behavior. These findings provide critical insights tailoring laser-clad for marine applications balancing suppression resistance.

Язык: Английский

Effects of Al/Ti Additions on the Corrosion Behavior of Laser-Cladded Hastelloy C276 Coatings DOI Open Access
Y. Chen, Rong Peng, Xin Fang

и другие.

Coatings, Год журнала: 2025, Номер 15(6), С. 678 - 678

Опубликована: Июнь 4, 2025

This study investigates the effects of aluminum (Al) and titanium (Ti) additions on porosity, microstructure, corrosion performance Hastelloy C276-based coatings fabricated via laser cladding nodular cast iron substrates. Nickel-based alloy powders blended with varying Ti (1–10 wt.%) Al (0.5–2.5 contents were deposited under optimized parameters. Microstructural characterization revealed that addition refined grain structure promoted formation TiC phases, while dispersed eutectic networks into isolated island-like structures. Both elements effectively suppressed porosity by reducing gas entrapment during solidification. However, excessive (10 induced brittle fracture due to agglomeration, caused interfacial cracks owing Al2O3 formation. Electrochemical tests in a 3.5 wt.% NaCl solution indicated Al/Ti enhanced initial passivation but reduced resistance weakened oxide film stability. XPS analysis Al-enriched formed Al(OH)3, whereas Ti-modified developed TiO2 TiC, both influencing behavior. These findings provide critical insights tailoring laser-clad for marine applications balancing suppression resistance.

Язык: Английский

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