The structure,morphology and composition of the composite coating of Ni P PTFE were analyzed by using the methods of XRD,SEM,AES and XPS.The results showed the structure of the Ni P PTFE composite coating was amorphou...The structure,morphology and composition of the composite coating of Ni P PTFE were analyzed by using the methods of XRD,SEM,AES and XPS.The results showed the structure of the Ni P PTFE composite coating was amorphous,the composite deposite was very smooth,uniform and good black in appearance.The coating was approximately 3.32μm thick and had strong corrosion resistance.The relative atomic percent contents of the coating were Ni 53.01,P 29.38,C 1.51,F 2.88,O 0.75 and Fe 10.08%.展开更多
采用化学镀方法在45钢表面制备Ni-P-PTFE镀层,利用显微硬度计、摩擦磨损试验机测试镀层的显微硬度、磨损质量和摩擦因数,并用扫描电镜和EDS能谱仪观察镀层的表面形貌及分析元素组成。结果表明:随着PTFE含量增加,Ni-P-PTFE镀层的显微硬...采用化学镀方法在45钢表面制备Ni-P-PTFE镀层,利用显微硬度计、摩擦磨损试验机测试镀层的显微硬度、磨损质量和摩擦因数,并用扫描电镜和EDS能谱仪观察镀层的表面形貌及分析元素组成。结果表明:随着PTFE含量增加,Ni-P-PTFE镀层的显微硬度、磨损质量以及摩擦因数均呈下降趋势;当PTFE的含量为8 m L/L时,镀层显微硬度、磨损质量和摩擦因数分别为344HV、7.5 mg和0.38。展开更多
目的研究Ni-P-PTFE镀层改性换热面对微生物污垢的抑制作用。方法调整化学镀工艺,在换热器常用的低碳钢表面制备不同性能的复合镀层,获取镀层厚度、镀速和表面能等参数。对低碳钢和Ni-P-PTFE复合镀层进行微观形貌对比,并进行黏液形成菌...目的研究Ni-P-PTFE镀层改性换热面对微生物污垢的抑制作用。方法调整化学镀工艺,在换热器常用的低碳钢表面制备不同性能的复合镀层,获取镀层厚度、镀速和表面能等参数。对低碳钢和Ni-P-PTFE复合镀层进行微观形貌对比,并进行黏液形成菌污垢静置实验,测量菌悬液中的细菌数量变化及试样质量变化。分析复合镀层表面在黏液形成菌污垢实验前后的宏观和微观形貌,与低碳钢试样进行对比,研究复合镀层试样表面能和镀层表面污垢沉积的关联性。结果 Ni-P-PTFE复合镀层改变了换热面的表面性能,接触角明显增大,表面能由改性前的49.16 m J/m2降低到7.54 m J/m2。与低碳钢的静置结果相比,悬挂复合镀层试样的菌悬液中黏液形成菌数量显著减少,复合镀层试样表面平均污垢沉积量减少到2.3 g/m2(低碳钢表面为12.1 g/m2)。结论 Ni-P-PTFE镀层可以有效抑制黏液形成菌的生长,低表面能有效减少了微生物污垢的沉积,使其表现出良好的耐蚀性和抗垢性。展开更多
文摘The structure,morphology and composition of the composite coating of Ni P PTFE were analyzed by using the methods of XRD,SEM,AES and XPS.The results showed the structure of the Ni P PTFE composite coating was amorphous,the composite deposite was very smooth,uniform and good black in appearance.The coating was approximately 3.32μm thick and had strong corrosion resistance.The relative atomic percent contents of the coating were Ni 53.01,P 29.38,C 1.51,F 2.88,O 0.75 and Fe 10.08%.
文摘采用化学镀方法在45钢表面制备Ni-P-PTFE镀层,利用显微硬度计、摩擦磨损试验机测试镀层的显微硬度、磨损质量和摩擦因数,并用扫描电镜和EDS能谱仪观察镀层的表面形貌及分析元素组成。结果表明:随着PTFE含量增加,Ni-P-PTFE镀层的显微硬度、磨损质量以及摩擦因数均呈下降趋势;当PTFE的含量为8 m L/L时,镀层显微硬度、磨损质量和摩擦因数分别为344HV、7.5 mg和0.38。
文摘目的研究Ni-P-PTFE镀层改性换热面对微生物污垢的抑制作用。方法调整化学镀工艺,在换热器常用的低碳钢表面制备不同性能的复合镀层,获取镀层厚度、镀速和表面能等参数。对低碳钢和Ni-P-PTFE复合镀层进行微观形貌对比,并进行黏液形成菌污垢静置实验,测量菌悬液中的细菌数量变化及试样质量变化。分析复合镀层表面在黏液形成菌污垢实验前后的宏观和微观形貌,与低碳钢试样进行对比,研究复合镀层试样表面能和镀层表面污垢沉积的关联性。结果 Ni-P-PTFE复合镀层改变了换热面的表面性能,接触角明显增大,表面能由改性前的49.16 m J/m2降低到7.54 m J/m2。与低碳钢的静置结果相比,悬挂复合镀层试样的菌悬液中黏液形成菌数量显著减少,复合镀层试样表面平均污垢沉积量减少到2.3 g/m2(低碳钢表面为12.1 g/m2)。结论 Ni-P-PTFE镀层可以有效抑制黏液形成菌的生长,低表面能有效减少了微生物污垢的沉积,使其表现出良好的耐蚀性和抗垢性。