本研究使用低碳鋼為基材，以電弧熔射(Arc-sprayed)純鈦層及微弧氧化(Micro-arc oxidation, MAO)表面處理技術提升材料的抗磨耗及抗腐蝕能力。
第一部分於低碳鋼表面電弧熔射純鈦層，接著以電壓450 V、電流密度35 A/dm2、微弧時間10 min及占空比(Duty Cycle) 50 %，添加不同濃度之添加劑(石墨烯、氮化硼及碳化硼)並在鈦/低碳鋼表面進行微弧氧化，完成後的氧化層進行表面形態、成分、晶相、膜厚、硬度、表面粗糙度、抗磨耗及抗腐蝕性能量測。實驗結果顯示，於MAO電解液之添加劑能有效提升複合材料抗磨耗及抗腐蝕性能，添加劑會經由MAO過程包覆於氧化層中，進而填補氧化層裂縫、孔洞並產生柱狀結構，阻止裂痕延伸，降低剝落現象。與無添加劑相較，當石墨烯添加劑濃度為0.007 g/L時，抗磨耗及抗腐蝕能力分別提升80 %及409 %；當氮化硼添加劑濃度為0.9 g/L時，抗磨耗及抗腐蝕能力分別提升72 %及403 %。當碳化硼添加劑濃度為0.9 g/L時，抗磨耗及抗腐蝕能力分別提升70 %及467 %，結果顯示石墨烯添加劑有較佳綜合性能。
因此第二部分以石墨烯為添加劑，使用田口法進行MAO品質最佳化分析，以電壓、電流密度、石墨烯濃度及占空比為控制因子，各因子選擇3個水準值，再對抗磨耗及抗腐蝕性能進行54組實驗，經由訊號雜訊(Signal-to-noise, S/N)比、主效果分析及變異數分析後可獲得最佳參數組合為電壓450 V、電流密度35 A/dm2、占空比50 %及石墨烯濃度0.007 g/L，經確認實驗顯示抗磨耗及抗腐蝕性能分別優化約46.3 %及45.8 %，且確認實驗均落於95 %信賴區間內，證明最佳化參數具有可靠性及再現性。

In this study, arc-sprayed pure titanium layer and micro-arc oxidation (MAO) surface treatment were used to enhance the wear and corrosion resistance of low-carbon steel as the substrate.
In the first section, a pure titanium layer was coated on the low carbon steel by arc-spray, followed by micro-arc oxidation on the titanium layer with voltage 450 V, current density 35 A/dm2, operation time 10 min, and duty cycle 50% with different concentrations of additives (graphene, boron nitride, and boron carbide). The surface morphology, composition, crystalline phase, film thickness, hardness, surface roughness, wear, and corrosion resistance of the prepared oxide layers were measured. The experimental results indicated that the additives in the MAO electrolyte could effectively improve the wear and corrosion resistance of the composites. The additive would be coated in the oxide layer by the MAO process, which would fill the cracks and holes in the oxide layer and create a columnar structure to prevent the extension of cracks and reduce the peeling phenomenon. Compared with free additive, when the concentration of graphene additive was 0.007 g/L, the wear and corrosion resistance were increased by 80 % and 409 %, respectively. When the concentration of boron nitride additive was 0.9 g/L, the wear and corrosion resistance were increased by 72 % and 403 %. When the concentration of boron carbide additive was 0.9 g/L, the wear and corrosion resistance were increased by 70 % and 467 %. The results indicated that the graphene additive had better performance.
Therefore, in the second part, the graphene was used as an additive to optimize the quality of MAO using Taguchi method, and voltage, current density, graphene concentration, and duty cycle were used as control factors. Each factor was selected as 3 levels, and 54 experiments were carried out to measure the wear and corrosion resistance. The signal-to-noise (S/N) raio, main effect analysis, and analysis of variance(ANOVA) resulted in the optimal combination of voltage 450 V, current density 35 A/dm2, duty cycle 50 %, and graphene concentration 0.007 g/L. The confirmation experiments indicated that the wear and corrosion resistance were improved by about 46.3% and 45.8% and the confirmation experiments fell within the 95% confidence interval, proving the reliability and reproducibility of the optimized parameters.

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