Abstract
AbstractThe corrosion of zinc in circumstances closely simulating those existing in a dry primary cell during storage has been examined with special reference to the effect of ionic impurities. It is shown that, after 12 weeks in ammonium chloride electrolyte solution containing such impurities, the attack on the zinc may be drastically modified. In particular, earlier work is confirmed which suggested that cobalt and nickel are extremely harmful and that mercury exerts a protective influence. No satisfactory explanation of these facts has been found.It is shown that the chemical reactions associated with the corrosion are independent of the added ions. A sequence of reactions is suggested to explain the changes observed in the solution and in the solid corrosion products as corrosion progresses.
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