不同体系非晶合金电化学腐蚀行为研究

Electrochemical Corrosion Behavior of Amorphous Alloys in Different Systems

李宗茂 ¹范新会 ¹李想 ²耿甜甜 ²谭本立 ¹杨珂 ²李炳²

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作者信息

1. 西安工业大学材料与化工学院,西安 710021;商洛学院化学工程与现代材料学院,商洛 726000
2. 西安工业大学材料与化工学院,西安 710021
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摘要

研究了Hf28Be18Ti17Zr17Cu7.5Ni12.5、Zr41.2Ti13.8Cu12.5Ni10Be22.5、(Cu43Zr48Al9)98Y2 3种非晶合金分别在 3.5%的NaCl溶液、1 mol/L HCl溶液和1 mol/L的H2SO4溶液中的电化学腐蚀行为,并与304不锈钢进行对比.结果发现,在含Cl-腐蚀液中,3种非晶合金均发生明显腐蚀,其中Hf28Be18Ti17Zr17Cu7.5Ni12.5(Hf28合金)腐蚀程度最低,腐蚀电流密度最小,而Cu基非晶合金发生了严重的腐蚀.在1 mol/L的H2SO4溶液中,3种非晶合金均展现良好的耐蚀性能,腐蚀电流密度均在10-7 A/cm2左右,且具有较正的腐蚀电位,表面均无明显腐蚀痕迹.表明非晶合金受Cl-离子侵蚀的影响较大,而在氧化性的腐蚀液中,合金表面极易形成钝化膜,表现出优异的抗腐蚀性能.

Abstract

Electrochemical corrosion behaviors of Hf28Be18Ti17Zr17Cu7.5Ni12.5,Zr41.2Ti13.8Cu12.5Ni10Be22.5,and(Cu43Zr48Al9)98Y2 amorphous alloys in 3.5%NaCl solution,1 mol/L HCl solution,and 1 mol/L H2SO4 solution were investigated,and compared with 304 stainless steel.The results reveal that in Cl-containing etchant,significant corro-sion occurs in all amorphous alloys,where the corrosion degree and corrosion current density of Hf28 alloy are the low-est,while Cu-based amorphous alloys undergo severe corrosion.In 1 mol/L H2SO4 solution,all amorphous alloys exhibit desirable corrosion resistance,with corrosion current densities around 10-7A/cm2 and positive corrosion poten-tials.Absence of corrosion trace was observed on the surfaces of alloys,indicating strong impact of Cl-on amorphous alloys,and passivation films were easily formed in oxidizing etchant,proving excellent corrosion resistance of amor-phous alloys.

关键词

非晶合金/电化学腐蚀/腐蚀电流密度

Key words

Amorphous Alloys/Electrochemical Corrosion/Corrosion Current Density

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基金项目

陕西省科技厅一般资助项目(2024JC-YBQN-0403)

陕西省教育厅一般科研资助项目(22JK0418)

出版年

2024

特种铸造及有色合金

中国机械工程学会铸造分会

特种铸造及有色合金

CSTPCD北大核心

影响因子：0.481

ISSN：1001-2249

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