【作者】 刘学忠；

【导师】 田进涛；

【作者基本信息】 中国海洋大学 ， 材料物理与化学， 2010， 硕士

【摘要】 化学镀Ni-P镀层因其具有良好的耐蚀性、耐磨性而广泛应用于化工、机械、电子等行业。为了进一步拓展化学镀镍层的应用范围,在化学镀镍溶液中掺杂入第三种粒子可以获得性能更优异的镀层。PTFE粒子具有极强的化学惰性、优异的不粘性和极低的表面能,将PTFE粒子掺杂入Ni-P镀层中可以结合PTFE粒子和Ni-P镀层的优点。我们用化学镀的方法在碳钢表面制备了Ni-P及不同PTFE粒子含量的Ni-P-PTFE镀层。本文通过扫描电子显微镜(SEM)、能谱仪(EDS)、X射线衍射仪(XRD)观察了镀层的表面形貌、分析了镀层中各元素含量及镀层物相组成；通过测量Ni-P及Ni-P-PTFE镀层在天然海水和灭菌海水中的电化学阻抗(EIS),研究了Ni-P及Ni-P-PTFE镀层在天然海水和灭菌海水中的耐腐蚀性能。实验结果表明：相比于Ni-P-PTFE镀层,Ni-P镀层表面致密度较高；对于Ni-P-PTFE镀层,随着镀液中PTFE粒子含量增多所制得的Ni-P-PTFE镀层中PTFE粒子含量也逐渐增多；未经热处理的Ni-P及Ni-P-PTFE镀层均是非晶镀层；EIS分析结果表明,Ni-P及Ni-P-PTFE镀层在灭菌海水中的阻抗值都要高于其在天然海水中的阻抗值,对于Ni-P-PTFE镀层随着PTFE粒子含量增多,耐腐蚀性能逐渐降低。更多还原

【Abstract】 Electroless deposited nickel-phosphorus coatings have been widely applied in many industries, such as chemical engineering, mechanical and electronic engineering, etc. due to their good anti-corrosion properties and wear resistance. In order to develop applied range of the coatings, some other particles were mixed in the plating bath to obtain composite coatings with more outstanding capability. Polytetrafluoro-ethylene (PTFE) is chemically very inert. PTFE also has non-stick property due to its low surface energy. The incorporation of PTFE nanoparticles into the Ni-P matrix can take advantage of the different properties of Ni-P alloy and PTFE. The Ni-P and Ni-P-PTFE coatings with different PTFE particiles concentration were electroless prepared on carbon steel in this study. The micromorphology, element composition and distribution, and phase composition of the coaings were studied by scanning electron microscope (SEM), energy disperse spectroscopy (EDS), X-ray diffraction (XRD). The corrosion resistance of the Ni-P and Ni-P-PTFE coatings in natural seawater and steriled seawater were researched by electrochemical impedance spectroscopy (EIS). The results showed that the Ni-P palting was quite dense. For the Ni-P-PTFE composite coatings, the PTFE content in the coatings increased with increasing PTFE concentration in the solution. The electroless deposited Ni-P and Ni-P-PTFE coatings were in an amorphous state. The corrosion resistances of the Ni-P and Ni-P-PTFE platings were better in steriled seawater than in natural seawater. With the PTFE concentration increasing in Ni-P-PTFE coatings, the corrosion resistance turned worse.更多还原