Innovative experimental design and teaching practice of the effect of the rare earth Ce on the microstructure and properties of Ni-Co coatings
The comprehensive electrochemical experiment of the effect of rare earth Ce on the microstructure and properties of Ni-Co alloy coatings was designed based on the application of electrochemical deposition in the field of"remanufacturing".Ni-Co alloy coating was prepared with nickel sulfate system as the main raw material for the purpose of students mastering the preparation,characterization and property testing methods of Ni-Co coating under the guidance of electrochemical deposition theory.The microstructure and chemical composition of the coating were characterized by scanning electron microscope and energy dispersive X-ray spectroscopy.The phase structure of the coating was analyzed by X-ray diffraction.The microhardness,wear resistance and corrosion resistance of the coating were tested by microhardness tester,friction and wear testing machine and electrochemical workstation.This experiment could improve students'basic experimental skills.Meanwhile,the experiment combined multiple subjects of electrochemistry,materials,machinery,which improve students'innovative ability and scientific research literacy in the process of teaching practice.
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