廃乾電池焙焼粉末を用いて作製した溶射皮膜の親水特性

抄録

The exhaust amount of the waste dry batteries in our country tends to increase every year. However, most of the recycled calcinations powder gained from the disposal process of these waste dry batteries is still unutilized. ZnO and MnO are the main consists of the calcinations powder, they are expected to be used as thermal spraying materials.
This paper describes a study result of the hydrophilicity on the sprayed coating formatted by the calcinations powder. When a water drop spread on the coating surface, the diameter of the droplet is considered as an indicator to evaluate the hydrophilicity in this study. The influences of the coating thickness, temperature and existence of grinding on the droplet diameter are clarified. Furthermore, the infiltration speed of the water drop in the capillary of coating, and the ionic property of combination between the elements, which constitute the coating are discussed. From the results of these general investigations, it is clarified that the sprayed coating formatted by the calcinations powder has a remarkable hydrophilicity. It is shown that the application to a heat exchanger, etc. is expectable.