Quantification of the amount and the corrosive action of stray current (from the LRT) entering the DLSU water mainlines

Date of Publication

1992

Document Type

Bachelor's Thesis

Degree Name

Bachelor of Science in Chemical Engineering

Subject Categories

Chemical Engineering

College

Gokongwei College of Engineering

Department/Unit

Chemical Engineering

Abstract/Summary

Buried metal structures are subjected to different kinds of corrosion one of which is due to stray currents. With the erection of the metro rail system in 1985, it became inevitable that underground pipelines will be affected by stray currents leaking from the LRT system. Since stray currents cause a very fast deterioration of underground metalworks as compared to other types of corrosion, it is therefore, imperative that a quantitative study be made on the effects of this type of corrosion.Because of their apparent orientation, that is, positioned very near the LRT, De La Salle water pipelines are most likely to be affected by stray currents. This study concerns in the determination if currents do indeed enter a pre-selected test pipe, whether they are stray currents from the LRT, and how extensive is the corrosion these currents bring about.Soil resistivity was measured as well as the pipe resistivity. Pipe potentials were determined by the employ of a copper-copper sulfate half cell. Soil moisture and pH were also determined. Finally, quantification of the amount of corrosion was done by using sample pipes that acted as sacrificial anodes.

Abstract Format

html

Language

English

Format

Print

Accession Number

TU05681

Shelf Location

Archives, The Learning Commons, 12F, Henry Sy Sr. Hall

Physical Description

81 leaves ; Computer printout

Keywords

Stray currents--Philippines--Manila; Underground pipelines--Corrosion

Embargo Period

1-12-2021

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