The toxic and antiseptic properties of paints

• Publisher: Elsevier Science
• Year: 1914
• Tongue: English
• Weight: 64 KB
• Volume: 177
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(14)90353-2

✦ Synopsis

CURRENT ToPics.

[J. F. I.

open circuit there was a potential difference of o.15 to 0.2 volt from lead to iron. When current flowed through the test troughs, lead nitrate and carbonate formed on the lead; the iron plates were attacked much more vigorously, and ferric hydrate with traces of ferrous oxide was found in the surrounding soil. The composition of the soil had an important bearing on the loss o.f weight per amp6rehour in cases (A) and (B) respectively; approximate data are 1.6 grammes and 2.88 grammes lead, and 1.33 grammes and 0.89 gramme iron per amp6re-hour. The conclusion reached is that iron pipes are attacked electrolytically if they are positive to return rails; before lead is thus attacked, a critical potential difference of o.2 volt must be exceeded; in any particular case, lead is attacked much less readily than iron.