钟鹏,石志强,王彦芳,等.Zr2TiCuNiBe高熵非晶合金的电化学腐蚀行为[J].精密成形工程,2023,15(5):139-147.
ZHONG Peng,SHI Zhi-qiang,WANG Yan-fang,et al.Electrochemical Corrosion Performance of Zr2TiCuNiBe High-entropy Metallic Glass[J].Journal of Netshape Forming Engineering,2023,15(5):139-147. |
| Zr2TiCuNiBe高熵非晶合金的电化学腐蚀行为 |
| Electrochemical Corrosion Performance of Zr2TiCuNiBe High-entropy Metallic Glass |
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| DOI：10.3969/j.issn.1674-6457.2023.05.017 |
| 中文关键词: 高熵非晶合金 Zr2TiCuNiBe 电化学腐蚀 H2SO4溶液 NaOH溶液 NaCl溶液 |
| 英文关键词: high-entropy metallic glass Zr2TiCuNiBe electrochemical corrosion H2SO4 solution NaOH solution NaCl solution |
| 基金项目:山东省自然科学基金(ZR2019MEM032) |
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| 中文摘要: |
| 目的 设计一种具有高玻璃形成能力的高熵非晶合金，并探讨其电化学腐蚀行为。方法 通过合金的原子尺寸差、混合熵、混合焓等经验参数规律，设计ZrxTiNiCuBe(x=1.5、2、2.5、3、3.5)合金，并采用铜模吸铸法制备直径为6 mm的样品。利用X射线衍射技术表征材料的结构，通过电化学工作站分析Zr2TiNiCuBe高熵非晶合金在1 mol/L H2SO4、1 mol/L NaOH和3.5%(质量分数)NaCl这3种溶液中的电化学腐蚀行为，并研究溶液温度、晶化处理对合金在NaCl溶液中电化学腐蚀行为的影响。结果 设计的Zr–Ti–Ni–Cu–Be合金均为单一的非晶结构，具有较强的玻璃形成能力。Zr2TiNiCuBe高熵非晶合金在H2SO4、NaOH溶液中具有钝化行为，主要发生均匀腐蚀，在H2SO4溶液中的自腐蚀电流密度和维钝电流密度分别为6.42×10–8、3.49×10–6 A/cm2，在NaOH溶液中的自腐蚀电流密度和维钝电流密度分别为1.59× 10–7、5.66×10–6 A/cm2。在NaCl溶液中主要发生点蚀现象，自腐蚀电流密度和点蚀电位分别为7.26×10–8 A/cm2和−0.103 V，具有较强的点蚀钝化能力。结论 Zr2TiCuNiBe高熵非晶合金在H2SO4、NaOH和NaCl溶液中均呈现出比304L不锈钢更优异的电化学腐蚀性能。 |
| 英文摘要: |
| The work aims to design a high-entropy metallic glass with high glass forming ability and investigate its electrochemical corrosion performance. ZrxTiNiCuBe (x=1.5, 2, 2.5, 3 and 3.5) alloy was designed according to the empirical parameters and rules of atomic size difference, mixing enthalpy and mixing entropy and samples with a diameter of 6 mm were prepared by copper die suction casting. The microstructure of the samples was characterized by X-ray diffractometer and the electrochemical corrosion performance of the Zr2TiNiCuBe HE-BMGs in 1 mol/L H2SO4, 1 mol/L NaOH and 3.5% NaCl solutions was analyzed by electrochemical workstation and the effects of solution temperature and crystallization on electrochemical corrosion performance of the alloy in NaCl solution were also studied. The designed Zr–Ti–Ni–Cu–Be alloy was single amorphous structure with strong glass forming ability. The Zr2TiNiCuBe HE-BMGs showed a typical passivation behavior and had uniform corrosion. The corrosion current densities and passivation current densities in H2SO4 and NaOH solutions were respectively 6.42×10−8, 3.49×10−6 and 1.59×10−7, 5.66×10−6A/cm2. In 3.5% NaCl solution, the Zr2TiNiCuBe HE-BMGs showed pitting corrosion. The corrosion current density and pitting potential were 7.26×10−8 A/cm2 and −0.103 V, indicating superior pitting corrosion re-passivation abilities. Zr2TiNiCuBe HE-BMGs shows better electrochemical corrosion performance than 304L stainless steel in the above aggressive solutions. |
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