Reduction of hexavalent chromium (Cr6+) in welding fumes during stellite hard facing with GTAW process. (2020)

• Record Type: Journal Article
• Authors: Raajesh Kannan, R.K.; Sivapirakasam, S.P.; Vishnu, B.R.; Rahul, M.; Mohan, Sreejith
• Is Part Of: Materials today. Volume 27:Part 3(2020)
• Page Start: 2052
• Page End: 2055
• Publication Date: 2020
• Subjects: Stellite -- Hardfacing -- Design of Experiments -- Alumina precursor -- Hexavalent chromium -- GTAW; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2019.09.057
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: A novel technique to reduce emission during stellite hardfacing was developed with a single compound activating flux. The strategy of coating the precursor of nano alumina to the base material brought a noticeable reduction in Cr 6+ concentration. The optimum combination of process parameters which favoured the maximum reduction Cr 6+ concentration in the welding fumes at the source was arrived using Taguchi methodology of experimental design. The maximum reduction of Cr 6+ up to 34% was achieved from this novel technique.