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Author

Jan E. Hardie

Document Type

Thesis - University Access Only

Award Date

1989

Degree Name

Master of Science (MS)

Department

Civil Engineering

First Advisor

Dwayne A. Rollag

Abstract

Corrosion is important to the waterworks industry for three reasons. These reasons are economics, health, and aesthetics. Corrosion may result in extensive and costly replacement of the distribution system. In 1979, the National Bureau of Standards reported that annual corrosion costs related to water distribution systems in the water supply field totaled about $700 million. About 20 percent of water supply corrosion costs were thought to be avoidable by control measures. Corrosion of materials in home plumbing and distribution pipelines increases the concentrations of metal ions in the water. Lead, cadmium, and other heavy metals that are present in piping materials in various amounts may be leached into the water, where they could cause possible health hazards when the water is used by the consumer. Secondary contaminants such as iron, copper and zinc, may also be leached into the water as a result of corrosion. When present in excessive concentrations, these contaminants may cause the water to be aesthetically unacceptable due to color, taste, or staining problems. The research objectives of this thesis were to study the effects of ozone on corrosion by: 1) determining the effect of ozonation on the corrosion rate as measured by a corrosion-sensing instrument; 2) determining the relationship between ozonation and dissolved oxygen concentrations in the water; 3) determining the effect of ozonation on water stability as measured by the use of Caldwell-Lawrence diagrams and the Langlier Saturation Index.

Library of Congress Subject Headings

Ozonization

Water-pipes -- Corrosion

Corrosion and anti-corrosives

Format

application/pdf

Number of Pages

145

Publisher

South Dakota State University

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