摘要
针对电化学腐蚀概念教学存在的不足,以手持技术数字化实验的TQVC概念认知模型为研究思路,定性与定量相结合,设计手持技术数字化实验以促进学生对电化学腐蚀概念的认知。利用温度传感器、氧化还原传感器、pH传感器,测定镁水型自热包在溶液中工作的温度曲线、氧化还原电势曲线、pH曲线,通过多重表征的手段解析镁水型自热包的腐蚀原电池工作原理、腐蚀发热原理、缓释均布剂与包埋剂的作用、各类型饭盒的加热效果,旨在帮助学生从装置-原理二维视角认识电化学腐蚀的本质,以期为日常教学提供参考。
Aiming at the shortcomings of electrochemical corrosion concept teaching,based on the TQVC concept cognitive model of handheld technology digital experiment,a handheld technology digital experiment is designed to promote students’cognition of electrochemical corrosion concept.Using temperature sensor,redox sensor and pH sensor,the temperature curve,redox potential curve and pH curve of aqueous magnesium self heating package working in solution are measured.The working principle of corrosive galvanic cell,corrosion heat generation principle,the role of slow-release homogenizer and embedding agent and the heating effect of various types of lunch boxes are analyzed by means of multiple characterization.The purpose of this study is to help students understand the essence of electrochemical corrosion from the two-dimensional perspective of device and principle,in order to provide reference for daily teaching.
作者
温金菊
钱扬义
张佳钰
谭宇凌
WEN Jin-Ju;QIAN Yang-Yi;ZHANG Jia-Yu;TAN Yu-Ling(College of Chemistry,South China Normal University,Guangzhou 510006,China)
出处
《化学教育(中英文)》
CAS
北大核心
2023年第9期112-119,共8页
Chinese Journal of Chemical Education
基金
2020年广东省研究生教育创新计划研究生示范课程建设项目“化学实验设计与研究(手持技术)”(2020SFKC023)
2020年广东省高等教育教学改革项目“化学卓越教师实验教学创新能力的‘四联动’培养范式——以教育部东芝杯全国师范大学化学教学创新大赛获奖作品为例”
2021年第二批国家一流本科线上课程“化学教学论手持技术数字化实验”申报项目。
关键词
电化学腐蚀
温度传感器
氧化还原传感器
PH
传感器
镁水型自热包
electrochemical corrosion
temperature sensor
redox sensor
pH sensor
magnesium-water type self-heating package