Corrosion Behavior of Cr-Al Coating Deposited on 304 Austenitic Stainless Steel by Electroplating and Multi-Arc Ion Plating in Liquid Lead-Bismuth Eutectic
The corrosion problem of liquid lead-bismuth eutectic alloy (LBE) on structural materials is one of the key material technologies that restrict the development of LBE cooling reactors. In this paper, two different Cr-Al coatings were synthesized by electroplating and multi-arc ion plating (MAIP) on 304 austenitic stainless steel. Cr-Al coated samples were treated by annealing treatment at 600°C for 12h, and their corrosion behaviors against static LBE were carefully evaluated at temperature of 600°C for 1000h compared with uncoated sample. The uncoated sample was corroded by the dissolution and oxidation of LBE severely. LBE was observed in electroplating Cr and MAIP Al coating. For MAIP Cr-Al coating, an oxide layer was formed that separated the LBE. The results showed that MAIP Cr-Al coating exhibits good corrosion resistance performance due to in-situ formation of a dense oxide layer on the coating surface. Besides, the addition of Cr makes the hardness of Al coating after annealing much higher than the hardness before annealing. For MAIP Cr-Al coating, the annealed Al coating exhibited an average hardness of 260 HV, about 5 times as high as the Al coating before annealing, of which the average hardness was 48 HV
Year of publication: |
[2022]
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Authors: | Sun, Weijian ; Wang | WANG, Jun ; Tang, Zhenghua ; Chen, Guang ; Yang, Wen ; Zhao, Haibo |
Publisher: |
[S.l.] : SSRN |
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