材料表面改質技術的開發對於提高在鋼鐵、化學、車輛和航太等工業材料的耐蝕性及耐磨性至關重要。本研究中，我們開發了一種複合塗層，先以熱噴塗法在AISI 1020低碳鋼基材上噴塗一層鈦金屬，再以微弧氧化法於鈦上生長出二氧化鈦氧化膜層。本實驗藉由改變微弧氧化時的放電電壓及微弧時間，並分析氧化膜膜厚、硬度、耐磨耗及耐腐蝕性能的影響。
以微弧氧化所生成之氧化膜在X射線繞射儀(XRD)分析下，均有二氧化鈦之金紅石相。從掃描式電子顯微鏡(SEM)分析圖中發現，二氧化鈦氧化膜表面的孔洞數量會隨著微弧時間增加而減少，但孔洞尺寸會隨著微弧時間增加而變大。厚度在固定時間，電壓增加時，其厚度會增加；而當固定電壓，增加時間時，厚度也會提升約三到四倍。從耐磨耗看來，微弧時間為15 min時，二氧化鈦氧化膜層的磨穿距離皆比10 min提升約10倍，當中又以電壓為350 V最佳。而耐腐蝕性則是微弧時間10 min時較佳，是因為二氧化鈦氧化膜層表面的孔洞雖然變少了，但是孔洞的孔徑變大，導致腐蝕液更容易從孔洞流進陶瓷氧化膜層內部，使其腐蝕能力降低。

The development of material surface modification technology is essential to improve the corrosion resistance and wear resistance of industrial materials such as steel, chemicals, vehicles and aerospace. In this study, we presented a coating technique for AISI 1020 steel on which there is a thermal-sprayed titanium layer and layer of TiO2 grows by micro-arc oxidation. At the same time, by changing the discharge voltages and micro-arc time during micro-arc oxidation, we investigated thickness, hardness, the wear and corrosion resistance effect of the oxide film.
The oxide film formed by micro-arc oxidation has a rutile phase of titanium dioxide under XRD analysis. From the SEM analysis, we found that the number of holes on the surface of the TiO2 film layer decreases as the micro-arc time increases, but the holes size increases as the micro-arc time increases. When the micro-arc time is fixed, the thickness will be increase when the voltage is increased; and when the voltage is fixed and the time is increased, the thickness will increase to become triple to quadruple. For the wear resistance, when the micro-arc time is 15 min, the wear-through distance of the TiO2 film layer is increased to ten times higher than 10 min., and the voltage 350 V gives the best wear resistense results. Corrosion resistance is better when the micro-arc time is 10 min Because the number of holes on the surface of the TiO2 film layer is reduced and the hole size becomes large. As a result, the etching liquid can easily flow from the holes into the ceramic oxide film layer, there reducing the corrosion ability.

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