Silvia Tejada, Estela Guevara, and Esperanza Olivares Universidad Nacional Autonoma de Mexico, Facultad de Quimica, Lab. 112, D.E.Pg., Edif. "B", Ciudad Universitaria, Mexico, D.F. 04510, Mexico
The corrosion of metals, especially iron, is a serious problem that costs billions of dollars every year. The process of corrosion can be demonstrated in a slide projector, since the cell is in the shape of a slide, or on the stage of an overhead projector by setting up a simple galvanic cell.
Corrosion occurs as the result of a galvanic cell reaction, in which the corroding metal acts as the anode.
Several simple demonstrations relating to corrosion are described here, for example : differential aeration cell, differential temperature cell, stresscorrosion cracking, and cathodic protection. We have found this kind of presentation to be very successful. Even in a large lecture room, the demonstration can be easily seen by all of the students.
The "Chemistry Teacher Connection" (CTC) is especially for high school chemistry teachers. For only $40/year, it offers an online-only subscription to CLIC along with membership in the Division of Chemical Education, normally $65/year. CTC subscribers receive access to all articles and supplements from 1996 through the current issue.
Through special arrangement with the ACS, JCE High School CLIC is now able to provide subscribers with online access to Chemical & Engineering News articles that have been selected specifically for secondary science instructors and their students.
Occasionally, collections of JCE back issues become available for donation to individual teachers, schools, or libraries. JCE matches collections with interested recipients. Recipients pay shipping costs or pick up the collection.
For journals in other fields of chemistry visit ACS Publications.
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