Effect of recrystallization annealing temperature on corrosion resistance of copper-bearing ferritic antibacterial stainless steel

doi:10.13251/j.issn.0254-6051.2020.05.010

Abstract

Abstract: Effects of recrystallization annealing temperature on corrosion resistance of copper-bearing ferritic antibacterial stainless steel were studied by means of microstructure analysis, pitting corrosion test, pitting morphology observation and dynamic potential polarization curve test. The results show that the recrystallization degree of copper-containing ferritic antibacterial stainless steel is gradually increased after holding for 5 min at 860-980 ℃, and the corrosion resistance first increases and then weakens. The optimum recrystallization annealing temperature is 900 ℃. The pitting pits of the copper-containing ferritic antibacterial stainless steel are open-type in the acidic FeCl₃ solution, and the pitting pit area and the depth decrease with the increase of recrystallization annealing temperature. The number of pitting pits increases obviously after annealing at 980 ℃.

Key words: antibacterial stainless steel, recrystallization annealing temperature, corrosion resistance

CLC Number:

TG142

Liu Yifei, Lu Hui, Sun Shaoheng, Zhao Aimin. Effect of recrystallization annealing temperature on corrosion resistance of copper-bearing ferritic antibacterial stainless steel[J]. Heat Treatment of Metals, 2020, 45(5): 51-55.

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