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One method for protecting metals against corrosion is to connect the metal directly to a "sacrificial anode". This is the method used to protect pipelines and ships hulls. Which of the following metals would you consider the best candidate for a sacrificial anode for a ship's hull? The hull is steel (which is mostly iron).
On Capillary Rise and NucleationR. Prasad A comparison of capillary rise and nucleation shows that both phenomena result from a balance between two competing energy factors: a volume energy and a surface energy. This comparison may help to introduce nucleation with capillary rise, a topic familiar to students. Prasad, R. J. Chem. Educ.2008, 85, 1389.
Liquids |
Materials Science |
Metallurgy |
Solids
Copper Metal from Malachite circa 4000 B.C.E.Gordon T. Yee, Jeannine E. Eddleton, and Cris E. Johnson The experiment starts with a naturally occurring ore, malachite, essentially pure Cu2CO3(OH)2, which is readily available at modest cost in bead form from jewelry stores. Using only a Bunsen burner, a porcelain crucible, and a charcoal briquette, the experiment demonstrates two steps in the ancient processing of copper ore: roasting and reduction. The product is a shiny copper metal bead that can then be hammered, polished, and shown to be electrically conductive. Yee, Gordon T.; Eddleton, Jeannine E.; Johnson, Cris E. J. Chem. Educ.2004, 81, 1777.
Metals |
Oxidation / Reduction |
Solids
Isolation of Copper from a 5–Cent Coin. An Example of ElectrorefiningSteven G. Sogo The United States 5cent coin, commonly known as a "nickel", is made of an alloy containing 75% copper and 25% nickel. The experiment is a visually appealing illustration of the process of electrorefining using selective reduction. Sogo, Steven G. J. Chem. Educ.2004, 81, 530.
MetallurgyEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Metallurgy
Copper, Brass, Bronze Volume 03, issue 25 of a series of leaflets covering subjects of interest to students of elementary chemistry distributed in 1929 - 1932.
Metallurgy
Iron and Steel Volume 03, issue 27 of a series of leaflets covering subjects of interest to students of elementary chemistry distributed in 1929 - 1932.
