(1. 嘉興學(xué)院 生物與化學(xué)工程學(xué)院，嘉興 314001；
2. 嘉興市化工清潔工藝重點(diǎn)實(shí)驗(yàn)室，嘉興 314001；
3. 常州大學(xué) 石油化工學(xué)院，常州 213164)
摘 要: 研究由NaOH、Na2SiO3、Na2B4O7組成的電解液體系中不同葡萄糖濃度對AZ31B 鎂合金陽極氧化膜性能的影響。通過電壓—時(shí)間曲線、Cass 鹽霧試驗(yàn)、SEM、EDS、XRD、EIS 和動(dòng)電位極化曲線等考察陽極氧化膜的性能和表面形貌。結(jié)果表明：葡萄糖可以有效地抑制火花放電，使氧化膜致密，微孔分布均勻及孔徑變小；與未添加葡萄糖所形成的氧化膜相比，添加葡萄糖所形成的氧化膜的自腐蝕電位正移，自腐蝕電流密度降低；當(dāng)葡萄糖濃度為10 g/L時(shí)所制備氧化膜的耐蝕性能最優(yōu)，其自腐蝕電位和自腐蝕電流密度分別為-1.265 V和1.55×10-8 A/cm2。
關(guān)鍵字: AZ31B鎂合金；葡萄糖；陽極氧化；耐蝕性
（1. College of Biological and Chemical Engineering, Jiaxing University, Jiaxing 314001, China;
2. Key Laboratory of Clean Chemical Process of Jiaxing, Jiaxing 314001, China;
3. School of Petr）
Abstract:The effect of glucose concentration on the properties of anodizing film on AZ31B magnesium alloy was investigated in the electrolyte composed of NaOH, Na2SiO3 and Na2B4O7. The properties and surface morphologies of the anodizing films were studied by voltage—time curves, Cass salt spray test, scanning electron microscopy(SEM), energy dispersion spectrometry(EDS), X-ray diffractometry (XRD), electrochemical impedance spectroscopy(EIS) and potentiodynamic polarization, respectively. The results show that the glucose can effectively suppress spark discharge. In the presence of glucose, a uniform and compact anodizing film with small aperture is obtained. Compared with the anodizing film formed in the electrolyte without glucose, the self-corrosion potential shifts to the positive direction and self-corrosion current density is reduced for the anodizing film formed in the electrolyte with the addition of glucose. The anodizing film formed in the electrolyte with 10 g/L glucose has the excellent corrosion resistance with self-corrosion potential of -1.265 V and self-corrosion current density of 1.55×10-8 A/cm2, respectively.
Key words: AZ31B magnesium alloy; glucose; anodizing; corrosion resistance
