Ni coating was deposited on carbon steel by a mechanical attrition enhanced electroplating （MAEE） process. During the electroplating, the mechanical attrition（MA） was introduced by impact of glass balls on the sample surface with a special vibrating frequency. The surface and cross-sectional images of Ni coating were observed with SEM. The microstructure and crystallinity of coating were examined with TEM and XRD. The electrochemical performance of coating was measured with polarization curves and electrochemical impedance spectroscopy （EIS） and its mechanical behaviours, such as tensile strength and hardness, were studied. The results show that the MA has significant effects on the microstructure and property of the electroplated Ni coating. By MA, the coating becomes smooth, compact, thin and has refined grains and is free of cracks and pores. Consequently, the adhesion, tensile strength, hardness and corrosion resistance of coating are improved significantly.
在工程教育专业认证理念的指引下,为了增强学生可持续发展的意识,聊城大学高分子材料与工程专业开设《高分子材料与环境安全》课程。本课程内容紧扣生态文明建设和绿色发展主题,使学生在工程实践中能够关注、理解和评价环境保护和社会和谐。任课教师采取线上超星与线下课堂相结合、教师指导与学生展示相结合、课程教学与课程思政相结合、过程性考核与期末考核相结合的多元素融合教学方式,提高学生的课堂参与度,增强学生将所学知识转化为解决复杂工程问题的能力。Under the guidance of engineering education certification, in order to enhance students’ awareness of sustainable development, the course of “Polymer Materials and Environmental Safety” was set up in Liaocheng University. The content of this course is closely related to the ecological civilization and green development, so that students can understand and evaluate the environmental protection and social harmony in engineering practice. The combination of online Chaoxing and offline blended teaching, teacher guidance and student participation, curriculum teaching and ideological and political education, process assessment and final assessment, can improve students’ participation in class, and enhance their ability of transforming knowledge into complex engineering problems.
