Freshwater Corrosion In The Duluth-Superior Harbor : Summary Of Initial Workshop Findings

Marsh, Charles P.

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Freshwater Corrosion In The Duluth-Superior Harbor : Summary Of Initial Workshop Findings

2005
By Marsh, Charles P.

[PDF-1.26 MB]

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Personal Author:

Marsh, Charles P.
Corporate Authors:

Engineer Research and Development Center (U.S.) ; Construction Engineering Research Laboratory (U.S. : 1969-1992) ; Minnesota Sea Grant College Program,;University of Wisconsin Madison ; National Sea Grant College Program (U.S.)

Engineer Research and Development Center (U.S.) ; Construction Engineering Research Laboratory (U.S. : 1969-1992) ; Minnesota Sea Grant College Program,;University of Wisconsin Madison ; National Sea Grant College Program (U.S.) Less -
NOAA Program & Office:

Sea Grant ; OAR (Oceanic and Atmospheric Research)

Sea Grant ; OAR (Oceanic and Atmospheric Research) Less -
Sea Grant Program:

MINNU (Minnesota Sea Grant)
Description:

This report reviews the potential causes of accelerated corrosion of sheet pile and other steel structures in the Duluth-Superior Harbor and makes recommendations for addressing the problem. The authors met in Duluth (September 2004) to examine harbor corrosion and consult with interested parties. The corrosion appears as pock marks primarily in the 4 feet just below the water surface. The corrosion extends down to about 10 feet, but decreases from 4 feet below the surface to 10 feet. The corroding pock marks are covered by an orangish coating that tends to cover the corroded pit. Water chemistry, dissolved oxygen content, and dissolved chlorides from de- icing salts seem to be the most likely agents of accelerated corrosion of 12 causes discussed. A lack of data made it unclear whether microbiological factors or functional harbor changes are unduly influencing corrosion in the harbor. The authors recommend immediately quantifying the corrosion rate, conducting a water chemistry analysis, checking for microbiologically influenced corrosion, testing for stray DC currents, and assessing the condition of critical steel structures. They encourage long-term monitoring of corrosion in the Duluth-Superior Harbor and other Great Lakes ports, as well as developing a condition-based strategy for steel replacement and repair.
Keywords:

[+]

Congresses Corrosion Fresh Water Harbors Sheet-piling Steel
Sea Grant Document Number:

MINNU-W-04-001
Document Type:

Conference Proceeding
Place as Subject:

Minnesota
Rights Information:

Public Domain
Compliance:

Library
Main Document Checksum:

[+]

urn:sha256:68048b93b2987efc6afa9db92fe089478839c2fb4d579a73783e02dd0c4e1954
Download URL:

https://repository.library.noaa.gov/view/noaa/38430/noaa_38430_DS1.pdf
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Freshwater Corrosion In The Duluth-Superior Harbor : Summary Of Initial Workshop Findings

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