Modern Chemistry, Lesson 144: Iron - Corrosion

To demonstrate corrosion, the film presents a series of demonstrations involving iron nails, washers, and other hardware which have been allowed to corrode in an agar gel containing phenolphthalein and dissolved potassium ferricyanide. Shows the effects of greasing iron, plating it with copper or tin, or plating it with zinc. Emphasizes and demonstrates the galvanic protection of iron.

Sources

  1. Catalog of Classroom Teaching Films for Georgia Schools, No. 10 (Georgia Department of Education) — title, creator, length, color, description