Study on Microstructure and Electrochemical Corrosion Behavior of Al2O3 Doped Molybdenum Alloys AITranslate
Abstract AITranslate
The effect of Al2O3doping on the electrochemical corrosion resistance of molybdenum alloys in 3.5%NaCl solution was studied,and the corrosion mechanism of the alloys was analyzed.The results show that the corrosion resistance of Mo-Al2O3alloys is significantly better than that of pure molybdenum,and it increases at first and then decreases with the increase of Al2O3content.During the corrosion process,Cl-is preferentially adsorbed on the defect positions of the molybdenum alloy oxide film to form pitting.With the increase of potential,the pitting expands along the grain boundary to become corrosion grooves.Al2O3can refine the molybdenum grains to promote the formation of a dense oxide film of molybdenum alloys which is less easily prone to pitting,thereby improving the corrosion resistance of the molybdenum alloys.However,when the volume fraction of Al2O3in molybdenum alloys reaches 1.6%,the Al2O3particles agglomerate and grow larger,which destroys the integrity of the oxide film of the molybdenum alloy and weakens their protection of the alloy matrix,resulting in a decrease in the corrosion resis-tance of the molybdenum alloy.
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Basic Information:
DOI：
Chinese Library Classification Number:TG146.412[金属学及工艺—金属材料]
Citation Information:
The effect of Al2O3doping on the electrochemical corrosion resistance of molybdenum alloys in 3.5%NaCl solution was studied,and the corrosion mechanism of the alloys was analyzed.The results show that the corrosion resistance of Mo-Al2O3alloys is significantly better than that of pure molybdenum,and it increases at first and then decreases with the increase of Al2O3content.During the corrosion process,Cl-is preferentially adsorbed on the defect positions of the molybdenum alloy oxide film to form pitting.With the increase of potential,the pitting expands along the grain boundary to become corrosion grooves.Al2O3can refine the molybdenum grains to promote the formation of a dense oxide film of molybdenum alloys which is less easily prone to pitting,thereby improving the corrosion resistance of the molybdenum alloys.However,when the volume fraction of Al2O3in molybdenum alloys reaches 1.6%,the Al2O3particles agglomerate and grow larger,which destroys the integrity of the oxide film of the molybdenum alloy and weakens their protection of the alloy matrix,resulting in a decrease in the corrosion resis-tance of the molybdenum alloy.
quote
| GB/T 7714-2015 | [1] JIAO Zhao-lin, XU Liu-jie, XU Zhao-ning, et al. Study on Microstructure and Electrochemical Corrosion Behavior of Al2O3 Doped Molybdenum Alloys[J]. Rare Metals and Cemented Carbides, 2022(5): 59-65. |
| MLA | [1] JIAO Zhao-lin, et al., "Study on Microstructure and Electrochemical Corrosion Behavior of Al2O3 Doped Molybdenum Alloys." Rare Metals and Cemented Carbides, no. 5, 2022, pp. 59-65. |
| APA | [1] JIAO Zhao-lin, XU Liu-jie, XU Zhao-ning, ZHOU Yu-cheng, & YANG Lu. (2022). Study on Microstructure and Electrochemical Corrosion Behavior of Al2O3 Doped Molybdenum Alloys. Rare Metals and Cemented Carbides(5), 59-65. |
| IEEE | [1] JIAO Zhao-lin, XU Liu-jie, XU Zhao-ning, ZHOU Yu-cheng, and YANG Lu, "Study on Microstructure and Electrochemical Corrosion Behavior of Al2O3 Doped Molybdenum Alloys," Rare Metals and Cemented Carbides, no. 5, pp. 59-65, 2022. keywords: {molybdenum alloy;AlOdoping;electrochemical corrosion;corrosion mechanism;oxide film;microstructure} |