研究了RE Ni W P SiC PTFE复合镀层的抗氧化性。结果表明 :RE Ni W P SiC PTFE复合镀层随着氧化温度的升高 ,氧化膜的重量增加 ,但在 80 0°C以下氧化温度对镀层的增重不显著 ;80 0°C以上 ,镀层的增重迅速增加。通过对三种镀...研究了RE Ni W P SiC PTFE复合镀层的抗氧化性。结果表明 :RE Ni W P SiC PTFE复合镀层随着氧化温度的升高 ,氧化膜的重量增加 ,但在 80 0°C以下氧化温度对镀层的增重不显著 ;80 0°C以上 ,镀层的增重迅速增加。通过对三种镀层抗氧化性能的比较可知 ,RE Ni W P SiC PTFE镀层的抗氧化性不如Ni W P、Ni W P SiC及RE Ni W P SiC三种镀层好。展开更多
研究了电流密度、镀液温度、pH值和PTFE等对电沉积RE Ni W P SiC PTFE复合镀层性能的影响。结果表明 ,镀态下镀层的硬度在 42 0~ 5 5 0Hv之间 ,当镀液中PTFE浓度为 2 5ml/L时 ,磨损量最小 ,但镀层的耐蚀性却最差 ;而当镀液中PTFE浓度为...研究了电流密度、镀液温度、pH值和PTFE等对电沉积RE Ni W P SiC PTFE复合镀层性能的影响。结果表明 ,镀态下镀层的硬度在 42 0~ 5 5 0Hv之间 ,当镀液中PTFE浓度为 2 5ml/L时 ,磨损量最小 ,但镀层的耐蚀性却最差 ;而当镀液中PTFE浓度为 30ml/L时 。展开更多
Corrosion rate and anode polarization curves of electrodeposited RE-Ni-W-P-SiC-PTFE composite coating in various concentrations of phosphoric and ferric chloride were researched. The results show that corrosion rate o...Corrosion rate and anode polarization curves of electrodeposited RE-Ni-W-P-SiC-PTFE composite coating in various concentrations of phosphoric and ferric chloride were researched. The results show that corrosion rate of the composite coatings increases with the increasing concentrations of phosphoric and ferric chloride, and reaches the maximum value when phosphoric concentration is 40% and ferric chloride concentration is 20% (mass fraction, the same below if not mentioned). Anode polarization curves of the composite coatings show that anode polarization current density of the composite coatings heat-treated at 200 ℃ or 500 ℃ is lower than that of other coatings heat-treated at 300 ℃ or 400 ℃, which displays that the composite coatings heat-treated at 200 ℃ or 500 ℃ have better corrosion resistance. Besides, corrosion resistance of the composite coating heat-treated at 500 ℃ is better than that as deposited and RE-Ni-W-P-SiC composite coating heat-treated at 400 ℃, and is also better than that of 316L stainless steel.展开更多
研究了脉冲电沉积Ni W P SiC复合电镀工艺。研究表明 :Ni W P SiC镀层的脉冲电沉积速率比直流电沉积的大 ,脉冲镀层的耐蚀性和硬度都优于直流镀层 ,耐蚀性还优于 1Cr18Ni9Ti不锈钢 ;脉冲频率和占空比对镀层的沉积速率、镀层成分以及镀...研究了脉冲电沉积Ni W P SiC复合电镀工艺。研究表明 :Ni W P SiC镀层的脉冲电沉积速率比直流电沉积的大 ,脉冲镀层的耐蚀性和硬度都优于直流镀层 ,耐蚀性还优于 1Cr18Ni9Ti不锈钢 ;脉冲频率和占空比对镀层的沉积速率、镀层成分以及镀层的性能都有很大的影响。SEM观察表明 ,脉冲镀层比直流镀层的结晶更细密 ,表面更光滑平整。展开更多
研究了RE Ni W P SiC复合镀层的脉冲电沉积工艺。结果表明:RE Ni W P SiC镀层的脉冲电沉积速率比直流电沉积大,脉冲镀层的耐蚀性和硬度都优于直流镀层,耐蚀性优于1Cr18Ni9Ti不锈钢;脉冲频率和占空比对镀层的沉积速率、镀层成分以及镀层...研究了RE Ni W P SiC复合镀层的脉冲电沉积工艺。结果表明:RE Ni W P SiC镀层的脉冲电沉积速率比直流电沉积大,脉冲镀层的耐蚀性和硬度都优于直流镀层,耐蚀性优于1Cr18Ni9Ti不锈钢;脉冲频率和占空比对镀层的沉积速率、镀层成分以及镀层的性能都有很大影响。脉冲镀层比直流镀层的结晶更细密,表面更光滑平整。稀土的加入有利于细化晶粒。展开更多
研究了化学镀Ni W P SiC复合镀层的孔隙率。结果表明,镀液温度和施镀时间对镀层孔隙率的影响较大,在镀液T=80℃、施镀时间t=2.5h时所得镀层的孔隙率较小;热处理温度和时间对镀层孔隙率有一定影响,热处理温度为400℃,时间为3h时,镀层... 研究了化学镀Ni W P SiC复合镀层的孔隙率。结果表明,镀液温度和施镀时间对镀层孔隙率的影响较大,在镀液T=80℃、施镀时间t=2.5h时所得镀层的孔隙率较小;热处理温度和时间对镀层孔隙率有一定影响,热处理温度为400℃,时间为3h时,镀层孔隙率最小。展开更多
研究了RE Ni W P SiC复合镀层在10%HCl,10%FeCl3,10%H2SO4和40%H3PO4等介质中的腐蚀行为。结果表明,以Ni W P合金为基体的复合材料镀层在镀态或热处理条件下,在硫酸、磷酸、盐酸和氯化铁溶液中具有较好的耐蚀性,其耐蚀性优于316L不锈... 研究了RE Ni W P SiC复合镀层在10%HCl,10%FeCl3,10%H2SO4和40%H3PO4等介质中的腐蚀行为。结果表明,以Ni W P合金为基体的复合材料镀层在镀态或热处理条件下,在硫酸、磷酸、盐酸和氯化铁溶液中具有较好的耐蚀性,其耐蚀性优于316L不锈钢;RE Ni W P SiC复合镀层在硫酸和磷酸溶液中的耐腐蚀性更明显;RE Ni W P SiC复合镀层在硫酸和磷酸溶液中的腐蚀为缝隙腐蚀和晶间腐蚀,而在盐酸和氯化铁溶液中的腐蚀为点蚀和晶间腐蚀。展开更多
文摘研究了RE Ni W P SiC PTFE复合镀层的抗氧化性。结果表明 :RE Ni W P SiC PTFE复合镀层随着氧化温度的升高 ,氧化膜的重量增加 ,但在 80 0°C以下氧化温度对镀层的增重不显著 ;80 0°C以上 ,镀层的增重迅速增加。通过对三种镀层抗氧化性能的比较可知 ,RE Ni W P SiC PTFE镀层的抗氧化性不如Ni W P、Ni W P SiC及RE Ni W P SiC三种镀层好。
文摘研究了电流密度、镀液温度、pH值和PTFE等对电沉积RE Ni W P SiC PTFE复合镀层性能的影响。结果表明 ,镀态下镀层的硬度在 42 0~ 5 5 0Hv之间 ,当镀液中PTFE浓度为 2 5ml/L时 ,磨损量最小 ,但镀层的耐蚀性却最差 ;而当镀液中PTFE浓度为 30ml/L时 。
基金Project([2002]24) supported by the National Development and Reform Commission of China
文摘Corrosion rate and anode polarization curves of electrodeposited RE-Ni-W-P-SiC-PTFE composite coating in various concentrations of phosphoric and ferric chloride were researched. The results show that corrosion rate of the composite coatings increases with the increasing concentrations of phosphoric and ferric chloride, and reaches the maximum value when phosphoric concentration is 40% and ferric chloride concentration is 20% (mass fraction, the same below if not mentioned). Anode polarization curves of the composite coatings show that anode polarization current density of the composite coatings heat-treated at 200 ℃ or 500 ℃ is lower than that of other coatings heat-treated at 300 ℃ or 400 ℃, which displays that the composite coatings heat-treated at 200 ℃ or 500 ℃ have better corrosion resistance. Besides, corrosion resistance of the composite coating heat-treated at 500 ℃ is better than that as deposited and RE-Ni-W-P-SiC composite coating heat-treated at 400 ℃, and is also better than that of 316L stainless steel.
文摘研究了脉冲电沉积Ni W P SiC复合电镀工艺。研究表明 :Ni W P SiC镀层的脉冲电沉积速率比直流电沉积的大 ,脉冲镀层的耐蚀性和硬度都优于直流镀层 ,耐蚀性还优于 1Cr18Ni9Ti不锈钢 ;脉冲频率和占空比对镀层的沉积速率、镀层成分以及镀层的性能都有很大的影响。SEM观察表明 ,脉冲镀层比直流镀层的结晶更细密 ,表面更光滑平整。
文摘研究了RE Ni W P SiC复合镀层的脉冲电沉积工艺。结果表明:RE Ni W P SiC镀层的脉冲电沉积速率比直流电沉积大,脉冲镀层的耐蚀性和硬度都优于直流镀层,耐蚀性优于1Cr18Ni9Ti不锈钢;脉冲频率和占空比对镀层的沉积速率、镀层成分以及镀层的性能都有很大影响。脉冲镀层比直流镀层的结晶更细密,表面更光滑平整。稀土的加入有利于细化晶粒。
文摘 研究了RE Ni W P SiC复合镀层在10%HCl,10%FeCl3,10%H2SO4和40%H3PO4等介质中的腐蚀行为。结果表明,以Ni W P合金为基体的复合材料镀层在镀态或热处理条件下,在硫酸、磷酸、盐酸和氯化铁溶液中具有较好的耐蚀性,其耐蚀性优于316L不锈钢;RE Ni W P SiC复合镀层在硫酸和磷酸溶液中的耐腐蚀性更明显;RE Ni W P SiC复合镀层在硫酸和磷酸溶液中的腐蚀为缝隙腐蚀和晶间腐蚀,而在盐酸和氯化铁溶液中的腐蚀为点蚀和晶间腐蚀。