| 运用铝土矿选矿尾矿制备三聚磷酸铝防腐颜料(英文) |
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| 引用本文： | 卢清华,胡岳华. 运用铝土矿选矿尾矿制备三聚磷酸铝防腐颜料(英文)[J]. 中国有色金属学会会刊, 2012, 22(2): 483-488. DOI: 10.1016/S1003-6326(11)61202-8 |
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| 作者姓名： | 卢清华 胡岳华 |
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| 作者单位： | 中南大学冶金科学与工程学院;中南大学资源加工与生物工程学院 |
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| 基金项目： | Project (2005CB623701) supported by the National Basic Research Program of China |
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| 摘 要： | 将铝土矿选矿尾矿与磷酸以P与Al摩尔比等于3的比例混合,制备了三聚磷酸铝,并用氧化锌对所制备的三聚磷酸铝进行改性处理,得到三聚磷酸铝防腐颜料。改性的三聚磷酸铝的酸度、白度及粒度均得到了改善。运用电化学阻抗方法测试了所制备的三聚磷酸铝防腐颜料的防腐性能。结果表明:含有改性三聚磷酸铝防腐颜料的涂层在电解质中浸泡40d后的阻抗为7×107Ω,含商品三聚磷酸铝防腐颜料APW?2的涂层浸泡40d后的阻抗为5.7×107Ω,这表明所制备的三聚磷酸铝防腐颜料具有优于或相当于商品防腐颜料的防腐性能。
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| 关 键 词： | 三聚磷酸铝 废物处理 电化学阻抗谱 |
| 收稿时间： | 2011-01-18 |
Synthesis of aluminum tri-polyphosphate anticorrosion pigment from bauxite tailings |
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| LU Qing-hua,HU Yue-hua. Synthesis of aluminum tri-polyphosphate anticorrosion pigment from bauxite tailings[J]. Transactions of Nonferrous Metals Society of China, 2012, 22(2): 483-488. DOI: 10.1016/S1003-6326(11)61202-8 |
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| Authors: | LU Qing-hua HU Yue-hua |
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| Affiliation: | 1.School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China;2.School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China |
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| Abstract: | Aluminum tri-polyphosphate was synthesized from bauxite tailings and phosphoric acid with a P/Al molar ratio of 3.This is highly advantageous from a waste recycling perspective as bauxite tailings are generally regarded as unusable waste.The acidity,whiteness and mean particle size of prepared aluminum tri-polyphosphate are all improved after modification.The possibility of using modified aluminum tri-polyphosphate as an anticorrosive pigment was also investigated by electrochemical impedance spectroscopy.The resistance of the coatings with modified aluminum tri-polyphosphate is 7×107 Ω for 40 d of immersion,which is superior or at least comparable to that of coatings containing APW-2,which exhibits a resistance of 5.7×107 Ω. |
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| Keywords: | aluminum tri-polyphosphate waste processing electrochemical impedance spectroscopy |
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