Abstract：FeCrNi medium entropy alloys were prepared by canned hot extrusion and hot press sintering technology, respectively. The effects of preparation process on microstructure and corrosion resistance of FeCrNi alloy were studied. The results show that the average grain size of FeCrNi medium entropy alloy prepared by hot extrusion is 13 μm with coarse annealing twins, while the average grain size of FeCrNi medium entropy alloy prepared by hot press sintering is smaller, and the average grain size is 6 μm. FeCrNi medium entropy alloy prepared by hot press sintering shows good corrosion resistance in 0.5 mol/L H2SO4+2×10-6 mol/L HF solution, that is a higher breakdown potential (0.979 V), a lower corrosion current density (7.68×10-6 A/cm2), and a wider passive zone ΔE (1.011 V). Cr element in the passive film of FeCrNi by hot extrusion is mainly in the form of Cr(OH)3, while Cr element in the passive film of FeCrNi by hot press sintering is mainly in the form of Cr2O3. This is because the high density grain boundaries of the fine crystal structure provide more diffusion channels for Cr, and then promote the formation of Cr2O3 in the passive film, and improve the stability and corrosion resistance of the passive film.
胡海霞, 刘咏, 黄千里. 制备工艺对粉末冶金FeCrNi中熵合金耐腐蚀性能的影响[J]. 粉末冶金材料科学与工程, 2023, 28(5): 490-499.
HU Haixia, LIU Yong, HUANG Qianli. Effect of preparation process on corrosion resistance properties of powder metallurgy FeCrNi medium entropy alloy. Materials Science and Engineering of Powder Metallurgy, 2023, 28(5): 490-499.
[1] MA J W, LUO H, HU X J, et al.Electrochemical study on the effect of hydrogen on the passive film of selective laser melted 316L stainless steel in a proton exchange membrane water electrolyzer environment[J]. International Journal of Hydrogen Energy, 2023, 48(51): 19396-19410. [2] 黄天纵, 陈辉, 吴勇, 等. 质子交换膜燃料电池双极板的研究进展[J]. 材料保护, 2022, 55(3): 136-145. HUANG Tianzong, CHEN Hui, WU Yong, et al.Research progress of bipolar plates in proten exchange membrane fuel cells[J]. Materials Protection, 2022, 55(3): 136-145. [3] ZHANG B, MA X L.A review—pitting corrosion initiation investigated by TEM[J]. Journal of Materials Science & Technology, 2019, 35(7): 1455-1465. [4] AYDOĞDU G H, AYDINOl M K. Determination of susceptibility to intergranular corrosion and electrochemical reactivation behaviour of AISI 316L type stainless steel[J]. Corrosion Science, 2006, 48(11): 3565-3583. [5] LUO H, ZOU S W, CHEN Y H, et al.Influence of carbon on the corrosion behaviour of interstitial equiatomic CoCrFeMnNi high-entropy alloys in a chlorinated concrete solution[J]. Corrosion Science, 2020, 163: 108287. [6] DING F, FU A, WANG J, et al.Significant strength enhancement of FeCrNiMox medium-entropy alloys via hard intermetallic particles dispersion strengthening[J]. Materials Characterization, 2023, 200: 112877. [7] XIE Z H, FU A, DUAN H, et al.Cryogenic mechanical behavior of a FeCrNi medium-entropy alloy fabricated by selected laser melting[J]. Intermetallics, 2023, 160: 107945. [8] WANG S, ZHAO Y H, XU X T, et al.Evolution of mechanical properties and corrosion resistance of Al0.6CoFeNiCr0.4 high-entropy alloys at different heat treatment temperature[J]. Materials Chemistry and Physics, 2020, 244: 122700. [9] HAN Z H, GUO Y A, YANG J, et al.Effect of Al addition on the corrosion behavior of the VCoNi medium-entropy alloys[J]. Journal of Alloys and Compounds, 2022, 920: 165954. [10] FU Y, LI J, LUO H, et al.Recent advances on environmental corrosion behavior and mechanism of high-entropy alloys[J]. Journal of Materials Science & Technology, 2021, 80: 217-233. [11] FU A, LIU B, LU W J, et al.A novel supersaturated medium entropy alloy with superior tensile properties and corrosion resistance[J]. Scripta Materialia, 2020, 186: 381-386. [12] ZHOU Z Y, LIU B, GUO W M, et al.Corrosion behavior and mechanism of FeCrNi medium entropy alloy prepared by powder metallurgy[J]. Journal of Alloys and Compounds, 2021, 867: 159094. [13] 蔡锋, 方铁辉. 晶粒尺寸梯度分布对316L不锈钢耐腐蚀性能的影响[J]. 粉末冶金材料科学与工程, 2021, 26(3): 227-234. CAI Feng, FANG Tiehui.Effect of gradient distribution of grain size on corrosion resistance of 316L stainless steel[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(3): 227-234. [14] PAN C, LIU L, LI Y, et al.The electrochemical corrosion behavior of nanocrystalline 304 stainless steel prepared by magnetron sputtering[J]. Journal of the Electrochemical Society, 2012, 159(11): C453-C460. [15] LEISTIKOW S, WOLF I, GRBKE H J.Effects of cold work on the oxidation behavior and carburization resistance of alloy 800[J]. Materials and Corrosion, 1987, 38(10): 556-562. [16] RAMAN R K S. Influence of microstructural variations in the weldment on the high-temperature corrosion of 2.25Cr-1Mo steel[J]. Metallurgical and Materials Transactions A, 1995, 26(7): 1847-1858. [17] GUPTA R K, BIRBILIS N.The influence of nanocrystalline structure and processing route on corrosion of stainless steel: a review[J]. Corrosion Science, 2015, 92: 1-15. [18] ZHAI W Z, LI J J, ZHOU R H, et al.Improved corrosion resistance of nickel-aluminum bronze by electron beam powder bed fusion[J]. Materials Chemistry and Physics, 2023, 296: 127225. [19] BOMMERSBACH P, ALEMANY-DUMONT C, MILLET J P, et al.Formation and behaviour study of an environment- friendly corrosion inhibitor by electrochemical methods[J]. Electrochimica Acta, 2005, 51(6): 1076-1084. [20] LUO H, LI Z, MINGERS A M, et al.Corrosion behavior of an equiatomic CoCrFeMnNi high-entropy alloy compared with 304 stainless steel in sulfuric acid solution[J]. Corrosion Science, 2018, 134: 131-139. [21] HAN Z H, REN W N, YANG J, et al.The corrosion behavior of ultra-fine grained CoNiFeCrMn high-entropy alloys[J]. Journal of Alloys and Compounds, 2020, 816: 152583. [22] FENG K, ZHANG Y, LI Z G, et al.Corrosion properties of laser cladded CrCoNi medium entropy alloy coating[J]. Surface and Coatings Technology, 2020, 397: 126004. [23] SHUANG S, DING Z Y, CHUNG D, et al.Corrosion resistant nanostructured eutectic high entropy alloy[J]. Corrosion Science, 2020, 164: 108315. [24] SHANG X L, WANG Z J, HE F, et al.The intrinsic mechanism of corrosion resistance for FCC high entropy alloys[J]. Science China Technological Sciences, 2018, 61: 189-196. [25] GARDIN E, ZANNA S, SEYEUX A, et al.Comparative study of the surface oxide films on lean duplex and corresponding single phase stainless steels by XPS and ToF-SIMS[J]. Corrosion Science, 2018, 143: 403-413. [26] TAYLOR C D, LI S, SAMIN A J.Oxidation versus salt-film formation: competitive adsorption on a series of metals from first-principles[J]. Electrochimica Acta, 2018, 269: 93-101. [27] HUANG J B, WU X Q, HAN E H.Electrochemical properties and growth mechanism of passive films on alloy 690 in high-temperature alkaline environments[J]. Corrosion Science, 2010, 52(10): 3444-3452. [28] GOLLAPUDI S.Grain size distribution effects on the corrosion behaviour of materials[J]. Corrosion Science, 2012, 62: 90-94. [29] PHANIRAJ M P, PRASAD M J N V, CHOKSHI A H. Grain-size distribution effects in plastic flow and failure[J]. Materials Science and Engineering A, 2007, 463(1/2): 231-237. [30] ZHU B, ASARO R J, KRYSL P, et al.Transition of deformation mechanisms and its connection to grain size distribution in nanocrystalline metals[J]. Acta Materialia, 2005, 53(18): 4825-4838. [31] RALSTON K D, BIRBILIS N, DAVIES C H J. Revealing the relationship between grain size and corrosion rate of metals[J]. Scripta Materialia, 2010, 63(12): 1201-1204. [32] LIU Q, WANG G F, SUI X C, et al.Microstructure and mechanical properties of ultra-fine grained MoNbTaTiV refractory high-entropy alloy fabricated by spark plasma sintering[J]. Journal of Materials Science & Technology, 2019, 35(11): 2600-2607.
2023, Vol. 28 
