Improvement in hot corrosion resistance of dissimilar alloy 825 and AISI 321 CO2-laser weldment by HVOF coating in aggressive salt environment at 900°C

• Published in: International journal of minerals, metallurgy and materials Vol. 27; no. 11; pp. 1536 - 1550
• Main Authors: Muthu, S. M., Arivarasu, M., Krishna, T. Hari, Ganguly, Supriyo, Prabhakar, K. V. Phani, Mohanty, Saurav
• Format: Journal Article
• Language: English
• Published: Beijing University of Science and Technology Beijing 01.11.2020; Springer Nature B.V
• Subjects: Base metal; Bead on plate welding; Butt joints; Carbon dioxide; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composites; Corrosion; Corrosion and Coatings; Corrosion products; Corrosion resistance; Corrosion tests; Dissimilar material joining; Glass; Hot corrosion; Laser beam welding; Lasers; Materials Science; Mechanical properties; Metallic Materials; Metallurgical analysis; Natural Materials; Nickel base alloys; Scale (corrosion); Scanning electron microscopy; Sodium sulfate; Stainless steels; Superalloys; Surfaces and Interfaces; Tensile tests; Thin Films; Tribology; Welding; Welding parameters; Weldments; X-ray diffraction; corrosion kinetics; high-velocity oxy-fuel coating; nickel-based superalloy; dissimilar welding; weldment corrosion

This study investigated the hot corrosion performance of a dissimilar weldment of Ni-based superalloy and stainless steel joined by CO 2 -laser welding and improved by high-velocity oxy-fuel (HVOF) coating in a Na 2 SO 4 -60wt%V 2 O 5 environment at 900°C. A dissimilar butt joint of AISI 321 and all...