In this paper, the element nitrogen (N) is used to partially replace the element nickel (Ni) in flux-cored wire. A 44%Ni-24%Cr-0.18N nitrogen-containing low-nickel flux-cored wire with excellent corrosion resistance is prepared. The corrosion behavior of nitrogen-containing low-nickel weld cladding and Inconel 625 weld cladding in 40 KCl + 60 MgCl (wt%) molten salt at 900 °C is studied. The results show that the selective dissolution of Cr occurs in both weld claddings. The corrosion resistance of the 44%Ni-24%Cr-0.18N nitrogen-containing low-nickel weld cladding is better than that of the Inconel 625 weld cladding. The reason is that added N can react with H in molten salt to generate NH4+, remove corrosive impurities of MgOH in molten salt and change the corrosion environment. N preferentially combines with Cr to form CrN, reduces the diffusion precipitation of Cr and improves the corrosion resistance.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9781760 | PMC |
| http://dx.doi.org/10.3390/ma15248831 | DOI Listing |
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