Battery zincs: Some causes of defective service

• Publisher: Elsevier Science
• Year: 1915
• Tongue: English
• Weight: 68 KB
• Volume: 180
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(15)90095-9

✦ Synopsis

504

CURRENT TOPICS.

[J. F. I.

(c) When the underlying metal is iron, but is coated with copper before being nickdled: If the layer of nickel is thin, the copper will appear immediately, followed closely by the appearance of the iron. If the nickel coating is heavy, only the iron will appear at the beginning of the reaction, followed by the appearance of copper after a time, which will be proportional to the quantity of nickel deposited.

In these three cases, then, the appearance of salts of iron and copper determines the end of the reaction, observable by the final formation of the double salt (for copper and nickel), and aided by a cautious addition to the mixture of a requisite quantity of concentrated ammonia.