高级检索
无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

大气中金属阴极保护用β-Al2O3粉体材料的制备与性质

樊增钊; 陈昆刚; 尹耀波; 徐孝和   

  1. 中国科学院上海硅酸盐研究所, 上海 200050
  • 收稿日期:2000-01-31 修回日期:2000-03-27 出版日期:2000-08-20 网络出版日期:2000-08-20

Preparation and Characteristic of β-Al2O3 Powdered Material as Electrolytic Coating for Cathode Protection in Atmosphere

FAN Zeng-Zhao; CHEN Kun-Gang; YIN Yao-Bo; XU Xiao-He   

  1. Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:2000-01-31 Revised:2000-03-27 Published:2000-08-20 Online:2000-08-20

PDF (PC)

1196

摘要： 研究了β－Ａｌ２Ｏ３粉体材料的制备工艺与性质，这种粉体材料可以采用慢速升温、分 阶段保温的工艺，煅烧Ｌｉ２ＣＯ３、Ｎａ２ＣＯ３和Ａｌ２Ｏ３的均匀混合物不经球磨直接制得．根据使用要求与生产条件，混合物可用干混、半湿混－过筛或喷雾干燥法来制备．粉体材料主要由β／β~＂－Ａｌ２Ｏ３组成，β~＂相的相对含量＞７０％，加入适当的粘结剂与溶剂，可将其制成大气环境 中金属管道外的固体电解质涂层．涂层中粉体的化学与电化学性能稳定，其阴极极化曲线有明显的平坦区，可用于阴极保护技术．

关键词: β-Al2O3, 粉体材料, 固体电解质, 阴极保护

Abstract: β-Al2O3 powdered material could be prepared from the mixtures of Li2CO3, Na2CO3
and Al2O3, which were obtained by dry mixing, wet mix-screening or spray-drying process, by stepped calculating without grinding. The effect
of preparation condition on the properties of the powdered material was showed. The powder composed of β/β’’-Al2O3 in principle, f(β’’)>70%, could be fabricated into solid electrolytic
coating for metal pipeline in atmosphere, with some binders and solvents. The powder in the coating was stable chemically and electrochemically to metal, binders and
moistur. The polarization behavior of cathode for “Beta-coating” showed that there was a flat at the polarization curve, which could be evaluated for the cathode protection of metal in atmosphere.

Key words: β-Al2O3, powdered material, solid electrolytic coating, cathode protection

中图分类号: