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Item Corrosion aspects of Al and Mg based composites(Elsevier, 2025) Bhole, K.B.; Arya, S.B.; Nayak, J.Corrosion is a significant concern in various industries, particularly in applications where metal components are exposed to aggressive environments. Aluminum (Al) and magnesium (Mg) are lightweight metals that find extensive use in aerospace, automotive, and structural applications. However, their susceptibility to corrosion limits their widespread adoption in certain conditions. Metal matrix composites (MMCs) have emerged as a promising solution to enhance the corrosion resistance of these metals while maintaining their desirable mechanical properties. The corrosion resistance of pure Al and Mg is often compromised in harsh environments due to galvanic coupling, electrolyte exposure, and chemical reactions. MMCs, where metal works as a matrix while reinforced by ceramic or hard metallic phases, offer a unique property to tailor a required mechanical property along with suitable corrosion resistance. However, it is challenging to control as well as enhance resistance to corrosion in various corrosive environments. The development of advanced metal matrix composites with tailored corrosion resistance profiles holds the key to expanding the application range of Al and Mg in diverse industries, ensuring their longevity and reliability in corrosive environments. A range of electrochemical techniques, including open circuit potential, electrochemical impedance spectroscopy, and polarization resistance test, highlighting their applications are discussed. © 2026 Elsevier Inc. All rights reserved..Item Influence of weld parameters on the tribocorrosion behaviour of friction stir welded AA5052 in the marine environment(Elsevier Ltd, 2025) Anantharam, G.S.; Bhole, K.B.; Kuriachen, B.; Arya, S.B.The study involves tribocorrosive investigation of FSW-AA5052 formed at tool-speeds of 800, 1000, and 1200 rpm and welding-speeds of 60, 80, and 100 mm/min, for which Pin-on-disc tests in conjunction with open-circuit-potential and potentiodynamic-polarization techniques were utilised. For microstructures EBSD, Optical images and XRD were taken. Results revealed that cast (?1.212 V; 332.43 ?m/year), 800 rpm (?1.213 V; 433.51 ?m/year) and 1000 rpm (-1.236 V; 227.45?m/year) welded samples showed better performance than all the 1200 rpm welded samples. Frictional characteristics of 800 rpm (CoF-1.28) and 1000 rpm (CoF-1.32) samples were better than other samples due to uniform and stable passivation. Elemental analysis showed Oxides and Chlorides of Al and Mg formed over the worn surfaces. © 2025 Elsevier LtdItem Enhancing X70 steel durability: Tribo-corrosion resistance through protective laser cladding(Elsevier Ltd, 2025) Singh, R.K.; Bhole, K.B.; Arya, S.B.; Nayak, J.This study investigates the effects of laser surface cladding (L-DED technique) on the tribo-corrosion behavior of API X70 steel in the simulated Indian oilfield water. Using optimized parameters, 500 W laser power, 720 mm/min scan speed, and 4.2 g/min powder feed rate, 316 L SS was successfully clad onto X70 steel without any significant defects. The results showed a significant improvement in corrosion resistance, with the SS clad exhibiting a corrosion rate of 131.3 ?m/year at 20 N, compared to 287.9 ?m/year for the X70 substrate. SEM and 3D profilometer analyses revealed a more stable tribo-layer on the SS clad, with less damage and debris accumulation. These findings highlight the potential of laser cladding to enhance the durability and lifespan of steel components. © 2025 Elsevier Ltd