- 學位論文
不同陶瓷真空鍍膜對燒結碳化鎢衝頭耐腐蝕性研究
Effect of Various Vacuum Ceramic Coatings on Corrosion Resistance of a Sintered Tungsten Carbide Punch
摘要
本研究以燒結碳化鎢為基材，藉由真空鍍膜技術沉積氮化鈦(TiN)、氮化鋁鈦(TiAlN)、類 鑽膜(Diamond-like carbon,DLC)等三種不同陶瓷鍍膜後，分析不同鍍膜結構，再置入3.5%NaCl、0.5M H2SO4、5M NaOH、20% HNO3 四種不同溶液內，量測開路電位對時間的變化，並使用電化學極化法測試其耐腐蝕。利用掃描式電子顯微鏡(SEM)和能量散射光譜儀(EDS)，觀察碳化鎢表面及陶瓷鍍膜腐蝕前後的表面形態及化學成分分析。 實驗結果顯示，經過電鍍氮化鈦(TiN)、氮化鋁鈦(TiAlN)、類鑽膜(DLC)，皆能有效提升碳化鎢的耐酸鹼腐蝕性，對碳化鎢腐蝕保護性均有顯著的改進效果。
並列摘要
(TiN), aluminum titanium nitride (TiAlN), and diamond-like carbon (DLC) were deposited by vacuum coating technology using sintered tungsten carbide as the substrate, and then the structures of the different coatings were analyzed and then put in four different solutions as follows:(1) 3.5% NaCl, (2) 0.5M H2SO4, (3) 5M NaOH, (4) 20% HNO3, measuring the change of open circuit potential with time, and using electrochemical polarization method to analysis their corrosion resistance. Scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) were used to observe the surface morphology and analysis chemical composition of tungsten carbide surface and ceramic coatings before and after corrosion. The experimental results show that after vacuum depositing titanium nitride (TiN), aluminum titanium nitride (TiAlN), and diamond-like carbon (DLC), all these coatings can effectively improve the acid and alkali corrosion resistance of the sintered tungsten carbide, and therefore improve the corrosion protection ability of the sintered tungsten carbide.