Application of selective dissolution of intermetallic particles on aluminum surface as a surface treatment

金属间化合物颗粒选择性溶解在铝表面作为表面处理的应用

基本信息

批准号：
10650698
负责人：
OSAMI Seri
金额：
$ 2.24万
依托单位：
Muroran Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650698/
关键词：
Aluminum Intermetallic compound Selective dissolution Recycle Surface treatment 不純物元素

项目摘要

It is well known that the more FeAlィイD23ィエD2 intermetallic compound particles usually exhibited on aluminum are more detrimental to corrosion. Since this iron element hardly dissolves in aluminum matrix as a solid solution, iron forms an intermetallic compound such as FeAlィイD23ィエD2, and disperses in the matrix. An effective surface treatment, by which preferential removal of FeAlィイD23ィエD2particles from the aluminum surface can proceed, has been investigated. A proposed treatment is the electrochemical surface treatment that the specimen is kept in the potential of-2.0V vs.Ag/AgCl for 1000s and quickly then held at the potential of 0.0V vs.Ag/AgCl for more over 1000s in 0.1kmol ・ mィイD1-3ィエD1 Al(NOィイD23ィエD2)ィイD23ィエD2 solution. Appreciable FeAlィイD23ィエD2-particle-ftee surface was obtained by this treatment. Furthermore, in order to get a perfect particle-free surface of the aluminum matrix, a simple and effective electrochemical treatment, by which selective removal of FeAlィイD23ィエD2can proceed, has been developed in trial and error. It is found that FeAlィイD23ィエD2-free surface is obtained by a cathodic treatment (-2.0V vs.Ag/AgCl for more than 1000s) in 17mass% HNOィイD23ィエD2 solution as the one of most successful techniques. We obtained perfect compound-free aluminum surface by this method. Mentioning above proposed the one of the effective surface treatment technologies and will help the aluminum recycle system when the recycle aluminum will be used from the cascade-use to the proper use (so-called products-to-products use).

众所周知，铝上的FeAlD23金属间化合物颗粒越多，越不利于腐蚀，因为这种铁元素很难以固溶体的形式溶解在铝基体中，因此铁会形成FeAl D23 D2等金属间化合物，并分散在铝基体中。研究了一种有效的表面处理方法，可以优先去除铝表面的 D23 颗粒。是指将样品在 0.1kmol ・ mii D1- 中，在 -2.0V vs.Ag/AgCl 的电位下保持 1000 秒，然后快速在 0.0V vs.Ag/AgCl 的电位下保持 1000 秒以上的电化学表面处理。 3 D1 Al(NO D23 D2) D23 D2 溶液明显。通过这种处理获得了FeAlD23D2-颗粒表面。此外，为了获得铝基体的完美无颗粒表面，已经在试验中开发了一种简单有效的电化学处理方法，可以选择性去除FeAl D23D2。发现通过阴极处理可以获得无 FeAlD23D2 的表面（-2.0V vs.Ag/AgCl 更多） 17mass% HNO2D23D2 溶液中的时间超过 1000s）是最成功的技术之一，我们通过这种方法获得了完美的无化合物铝表面，这是一种有效的表面处理技术，并且将有助于铝回收系统在回收铝时。会从级联使用到正确使用（所谓产品到产品使用）。