Effect of further alloying elements on corrosion resistance of Ni-Cr alloys in molten glass. (November 2016)

• Record Type: Journal Article
• Authors: Xu, Yaxin; Yan, Jingbo; Sun, Fei; Ikeda, Ayako; Gu, Yuefeng
• Is Part Of: Corrosion science. Volume 112(2016)
• Page Start: 647
• Page End: 656
• Publication Date: 2016-11
• Subjects: A. Ni-based alloy -- A. Glass -- B. SEM -- B. EPMA -- B. XRD -- C. High-temperature corrosion; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2016.09.007
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: Molten glass mainly attacks Cr carbide along grain boundaries in Ni-Cr alloy. Adding 5 wt.% Al changes the corrosion mode of Ni-Cr alloy. The alloy with 5 wt.% Al and Nb addition has the highest corrosion resistance. Excessive Al content deteriorates the corrosion resistance. Abstract: The corrosion behaviour of commercial Ni-Cr alloys added with Fe, Ti, Nb and Al was evaluated in molten glass at 1050 °C. The static-immersion results reveal that the corrosion depth after testing for 100 h roughly remains at the same level for the alloys added with 5 wt.% Al or added with Fe, Ti and Nb (FeTiNb) separately, but decreases greatly by co-adding 5 wt.% Al with FeTiNb. However, a further increase of Al content to 15 wt.% in the co-added alloy degrades the corrosion resistance. The corrosion mechanism was discussed based on the analysis of the corrosion layer.