This Article  • References  • Full text PDF  • Send to a friend  • Save in My Folder  • Save to citation manager  • Permissions  Citing Articles  • Citing articles on HighWire  • Contact me when this article is cited  Related Content  • Similar articles in this journal  Social Bookmarking   What's this?

L. EDWARD GAUL, M.D.

Arch Dermatol. 1962;86(1):77.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

A puzzle to corrosion engineers was the onset of galvanic leaks in soil pipes after street trolleys discontinued service. It was discovered that there had been a flow of current to the pipes which created "negative areas," and this in turn prevented the development of corrosion. For a long time it was known that pipes near the trolley substation had to have stray currents removed in order to neutralize "positive or anodic areas." If this was not done, galvanic breaks occurred. At the anodic area the current leaves the pipe, causing iron ions to enter the soil water which quickly forms hydrogen ions that move to the cathode areas, leaving behind rusty tubercles of iron.¹

Galvanic breaks in gas transmission systems are prevented by making the pipe a cathodic area. Anodes of magnesium or other suitable metals are spaced along the pipe lines. They are connected by insulated cables . . . [Full Text PDF of this Article]

Author Affiliations
EVANSVILLE, IND.

CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter     What's this?