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| Home > JCE Print > Journal of Chemical Education > Issues >
1998
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June
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In the Classroom
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Overhead Projector Demonstrations
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Slide Projector Corrosion Cell
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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
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June 1998
Vol. 75 No. 6
p. 747
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| Abstract |
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, stressÐcorrosion 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.
See Letter re: this article.
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| More Information |
 Citation |
Tejada, Silvia; Guevara, Estela; Olivares, Esperanza. J. Chem. Educ. 1998 75 747.
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Keywords |
Demonstrations, Physical Chemistry, Chemical Education Research, Electrochemistry, Microscale, Teaching/Learning Aids
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History |
Created:
Last Updated: |
June 23, 1999
June 24, 2005
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Link to Letter added (April 2004).
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| Home > JCE Print > Journal of Chemical Education > Issues >
1998
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June
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747
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