1020低碳鋼放電被覆鋁皮膜之表面性質研究

Study on Surface Properties of 1020 Low Carbon Steel Coated by Electro-Spark Deposited Aluminum

放電被覆法是一種新穎的表面處理技術，可用於修補金屬表面孔洞及缺陷，非常適合於現場局部性維修工作。本文旨在探討放電被覆鋁皮膜之附著力、表面結構與熔射鋁皮膜之差異。由實驗結果顯示，放電被覆鋁皮膜具有低氧化及低孔隙率之特性。經皮膜之附著力測試比較，放電被覆鋁皮膜亦具有較佳之附著力。因此，採用放電被覆鋁將有較佳之防蝕效果。

Electro-Spark Deposition is a newly developed technology of surface treatment of metals. It is very suitable for repairing the porosity or defects of metal surface in local conditions. In this study, we focused on the bonding strength of deposits and their surface morphology and microstructure of ESD aluminum. The difference of the surface properties between ESD and thermal sprayed aluminum was also discussed. The experimental results showed that the ESD aluminum layer had better bonding strength, lower porosity and oxidation phenomenon. Moreover, the better anti-corrosion property of ESD aluminum layer can be expected.