Si Cp 因其高强度、高模量、耐热、耐磨、耐高温等性能而被作为颗粒增强体制备金属基复合材料。本文用正交法优化了 Si Cp 表面化学镀铜工艺 ,获得了 Cu包覆 Si Cp,测定了 Si Cp 的增重百分率及镀液的 p H值随时间的变化规律 ,并对镀覆...Si Cp 因其高强度、高模量、耐热、耐磨、耐高温等性能而被作为颗粒增强体制备金属基复合材料。本文用正交法优化了 Si Cp 表面化学镀铜工艺 ,获得了 Cu包覆 Si Cp,测定了 Si Cp 的增重百分率及镀液的 p H值随时间的变化规律 ,并对镀覆层形貌进行了 SEM考察。结果表明 ,镀液的 p H值及 Ni2 +浓度对镀速影响最为显著 ;粒子分散很好。展开更多
Typical wastes from nickel plating operations include excess drag-out solution. An electrochemical approach was made to recover the nickel and remove the organic pollutants from the spent electroless nickelplating bat...Typical wastes from nickel plating operations include excess drag-out solution. An electrochemical approach was made to recover the nickel and remove the organic pollutants from the spent electroless nickelplating bath. An electrolyte cell which was constructed by the cathode of porous nickel foam and the anode of Ti/RuO2 was used. During electrolysis, the nickel ion was electrodeposited at the cathode and the oxidation of the organics in the hath was conducted at the anode. The current （i） , time （t） , temperature （T） and pH of the solution affected the recovery efficiency of nickel with constant potential electrolysis. With the optimum experimental conditions of pH=7.6, i = 0.45 A. T = 65℃ andt = 2 h, the concentration of nickel ion was reduced from 2.09 g/L to 0. 053 g/L and the recovery rate of nickel, the current efficiency and the consumed energy wer 97.5%, 17. 1%, 12.2 kWh/kg Ni, respectively. Meanwhile, total organic carbon （TOC） of the bath was reduced from 5 800 mg/L to 152.5 mg/L and the removal efficiency of TOC was 97.3%. The recovery rate of nickel could keep to about 97% when eleetrodeposit was used to recover nickel for 40 hours in a laboratol.w batch reactor containing the spent bath. Dull nickel containing phosphorus was obtained on the cathode.展开更多
文摘Si Cp 因其高强度、高模量、耐热、耐磨、耐高温等性能而被作为颗粒增强体制备金属基复合材料。本文用正交法优化了 Si Cp 表面化学镀铜工艺 ,获得了 Cu包覆 Si Cp,测定了 Si Cp 的增重百分率及镀液的 p H值随时间的变化规律 ,并对镀覆层形貌进行了 SEM考察。结果表明 ,镀液的 p H值及 Ni2 +浓度对镀速影响最为显著 ;粒子分散很好。
文摘Typical wastes from nickel plating operations include excess drag-out solution. An electrochemical approach was made to recover the nickel and remove the organic pollutants from the spent electroless nickelplating bath. An electrolyte cell which was constructed by the cathode of porous nickel foam and the anode of Ti/RuO2 was used. During electrolysis, the nickel ion was electrodeposited at the cathode and the oxidation of the organics in the hath was conducted at the anode. The current （i） , time （t） , temperature （T） and pH of the solution affected the recovery efficiency of nickel with constant potential electrolysis. With the optimum experimental conditions of pH=7.6, i = 0.45 A. T = 65℃ andt = 2 h, the concentration of nickel ion was reduced from 2.09 g/L to 0. 053 g/L and the recovery rate of nickel, the current efficiency and the consumed energy wer 97.5%, 17. 1%, 12.2 kWh/kg Ni, respectively. Meanwhile, total organic carbon （TOC） of the bath was reduced from 5 800 mg/L to 152.5 mg/L and the removal efficiency of TOC was 97.3%. The recovery rate of nickel could keep to about 97% when eleetrodeposit was used to recover nickel for 40 hours in a laboratol.w batch reactor containing the spent bath. Dull nickel containing phosphorus was obtained on the cathode.
