Compatibility between the Molten Mg-25Al-15Zn-14Cu Alloy and Stainless Steel for Phase-Transformation Thermal Storage Facility

Abstract:

The compatibility of molten Mg-25Al-15Zn-14Cu alloy with several candidate vessel shell materials such as 304 stainless steel, 201 stainless steel for phase-transformation thermal storage facility were evaluated by means of immersion corrosion test at 500°C for 1000 h. The microstructure, element distribution and surface corrosion layer structure and phase composition of the cross section of corrosion samples were analyzed by using optical microscope (OM), X-ray diffraction (XRD) and electron microprobe analysis (EPMA). The results show that two kinds of stainless steel have good compatibility in the molten Mg-25Al-15Zn-14Cu alloy. The thickness of the erosion layer is less than 0.1mm. The corrosion interface of corrosive material in the molten Mg-25Al-15Zn-14Cu alloy can be divided into the base layer, the diffusion layer, the corrosion layer, segregation layer (C, Cr, Ni), linked coating layer.

• Periodical: Advanced Materials Research (Volumes 1120-1121)
• Pages: 1099-1103
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1120-1121.1099
• Online since: July 2015
• Authors: Xiao Ling Ai, Xiao Ming Fan, Chang Lei, Xiao Min Cheng
• Keywords: Compatibility, Liquid Corrosion, Mg-Based Phase Change Heat Storage Alloy, Stainless Steel

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