Characterisation and corrosion study of electroless Nickel-Boron coating reinforced with alumina nanoparticles. (2019)

• Record Type: Journal Article
• Authors: Mohanty, Deviprasanna; Barman, Tapan Kumar; Sahoo, Prasanta
• Is Part Of: Materials today. Volume 19:Part 2(2019)
• Page Start: 317
• Page End: 321
• Publication Date: 2019
• Subjects: Electroless coatings -- Nickel-Boron -- Corrosion -- Nano-particles -- Micro hardness; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2019.07.216
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: This investigation deals with the study of 1 g/l alumina reinforced electroless Ni-B coatings on a low carbon steel substrate. Reinforced coatings were prepared from the as-received nano powders. The alumina nano particles were ultra-sonicated before being introduced into the coating bath. The reinforced coatings exhibited an improvement in hardness, and corrosion resistance. A significant increase of nearly 10%, was observed in case of the hardness of the reinforced coatings. Corrosion potential increased by about 6% with the addition of alumina nano particles. The agglomerated nano particles seem to embed in the nodular boundaries of the cauliflower like Ni-B morphology and in inter nodular porosities. This, in turn, improved the corrosion resistance by forming an intimate sacrificial layer on the vulnerable substrate material.