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在含SiC纳米颗粒的铬电镀液中,通过改变溶液中SiC纳米颗粒的含量,电沉积得到不同SiC纳米颗粒含量的Cr-SiC纳米复合材料涂层。采用直流共沉积技术在低碳钢基体上沉积得到纯Cr涂层和Cr-SiC纳米复合涂层。研究了电流密度、搅拌速度和SiC纳米颗粒浓度对电沉积的影响。用扫描电镜来研究涂层的表面形貌,用能谱分析检测Cr-SiC纳米复合涂层中SiC纳米粒,用动电位极化和电化学阻抗谱方法研究涂层在0.05mol/LHCl、1mol/LNaOH和3.5%NaCl中的腐蚀行为。用显微硬度计测量涂层的硬度和采用销-盘磨损试检研究涂层的磨损行为。
In the chromium electroplating solution containing SiC nanoparticles, Cr-SiC nanocomposite coatings with different SiC nanoparticle contents were electrodeposited by changing the content of SiC nanoparticles in the solution. DC co-deposition technology was used to deposit pure Cr and Cr-SiC nano-composite coatings on low carbon steel substrates. The effects of current density, stirring speed and SiC nanoparticle concentration on electrodeposition were investigated. Scanning electron microscopy was used to study the surface morphology of the coating. The energy spectrum analysis was used to detect the SiC nanoparticles in Cr-SiC nanocomposite coatings. The potentiodynamic polarization and electrochemical impedance spectroscopy / LNaOH and 3.5% NaCl corrosion behavior. The hardness of the coating was measured using a microhardness tester and the wear behavior of the coating was investigated using a pin-and-disk wear test.