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| 阴/阳极电流密度对铝合金微弧氧化陶瓷膜耐蚀性的影响 | |
| 引用本文： | 吴汉华,金曾孙,龙北红,汪剑波,王秀琴.阴/阳极电流密度对铝合金微弧氧化陶瓷膜耐蚀性的影响[J].材料保护,2004,37(12):9-10. |
| 作者姓名： | 吴汉华 金曾孙 龙北红 汪剑波 王秀琴 |
| 作者单位： | 1. 吉林大学超硬材料国家重点实验室,吉林,长春,130012;吉林大学物理学院,吉林,长春,130012 2. 吉林大学超硬材料国家重点实验室,吉林,长春,130012 3. 吉林大学材料科学与工程学院,吉林,长春,130012 |
| 摘 要： | 为了弄清铝合金微弧氧化重要参数对其耐点蚀和微硬度的影响,在氢氧化钠和硅酸钠溶液中,保持阳极电流密度为15A/dm2,制备了阴/阳极电流密度比在0.6～0.8之间的铝合金微弧氧化陶瓷膜.结果表明:阴/阳极电流密度比对陶瓷膜的抗点腐蚀性和硬度有很强的影响;不同阴/阳极电流密度比所制备的陶瓷膜微观结构差异较大,陶瓷膜抗点腐蚀性和硬度的不同是由这种微观结构差异所引起的. |
| 关 键 词： | 微弧氧化 电流密度比 铝合金 显微硬度 抗点蚀性 |
| 文章编号： | 1001-1560(2004)12-0009-02 |
Effects of Cathodic/Anodic Current Density on Pitting Corrosion Resistance of MAO Films |
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| WU Han-hu.Effects of Cathodic/Anodic Current Density on Pitting Corrosion Resistance of MAO Films[J].Journal of Materials Protection,2004,37(12):9-10. | |
| Authors: | WU Han-hu |
| Abstract: | Ceramic coatings were synthesized on the aluminum alloy substrate by mi- croarc oxidation (MAO) technique in aqueous solution containing sodium silicate and sodium hydroxide. The MAO coatings fabrica- ted under 15 A/dm~2 anodie current density and cathodie/anodic current density ratio between 0.6 to 0.8 were studied by X- ray diffraction ( XRD ), scanning electron microscopy ( SEM ), mi- crohardness test, and pitting corrosion test. The results show that the cathodie/anodic current density ratio has a strong effect on the microstrueture, pitting resistance and microhardness of MAO coating. The microstruetures of MAO coatings obtained under dif- ferent eathodie/anodie current density ratio are distinct, which result; in the difference of pitting resistance and hardness of ce- ramic coatings. |
| Keywords: | microarc oxidation current density ratio aluminum alloy microhardness pitting corrosion resistance |
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