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Title: Evaluation of the effectiveness of selected corrosion inhibitors for protection of prestressing steels in PCPVs

Abstract

The corrosion protection provided prestressing steel by portland cement-based grout in the presence of sulfide, nitrate, and chloride ion environments was evaluated. Results were compared to those obtained from selected, commercially available petroleum-microcrystalline waxes (petrolatums) compounded with organic corrosion inhibitors. The investigation was conducted in two phases: (1) a review of literature to establish the mechanisms of prestressing steel corrosion, techniques available for protection of prestressing steel in hostile environments, and the performance of structures that have utilized either nongrouted- or grouted-tendon prestressing systems; and (2) a laboratory study to develop relative performance data for portland cement grout and selected commercial petroleum-based greases and waxes containing inhibitors. Conclusions derived from the investigation indicate that (1) sulfide, nitrate, and chloride salts must be excluded from prestressing materials; (2) prestressing materials must be continuously protected from inimical environments; (3) the effectiveness of the protection provided by both the organic- and cement-based corrosion inhibitors is reduced unless the steel is completely covered; and (4) both cement- and organic-based corrosion inhibitors completely protect prestressing materials when properly applied.

Authors:
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (USA)
Sponsoring Org.:
USDOE
OSTI Identifier:
6402157
Report Number(s):
ORNL/TM-6479
TRN: 79-010577
DOE Contract Number:
W-7405-ENG-26
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 22 GENERAL STUDIES OF NUCLEAR REACTORS; CHLORIDES; CORROSIVE EFFECTS; NITRATES; STEELS; CORROSION RESISTANCE; SULFIDES; COMPARATIVE EVALUATIONS; CONTAINMENT; GROUTING; ORGANIC COMPOUNDS; PETROLEUM; PORTLAND CEMENT; PRESTRESSED CONCRETE; WIRES; ALLOYS; BUILDING MATERIALS; CEMENTS; CHALCOGENIDES; CHLORINE COMPOUNDS; CONCRETES; ENERGY SOURCES; FOSSIL FUELS; FUELS; HALIDES; HALOGEN COMPOUNDS; IRON ALLOYS; IRON BASE ALLOYS; MATERIALS; NITROGEN COMPOUNDS; OXYGEN COMPOUNDS; SULFUR COMPOUNDS; 360105* - Metals & Alloys- Corrosion & Erosion; 220200 - Nuclear Reactor Technology- Components & Accessories

Citation Formats

Naus, D J. Evaluation of the effectiveness of selected corrosion inhibitors for protection of prestressing steels in PCPVs. United States: N. p., 1979. Web. doi:10.2172/6402157.
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Naus, D J. Evaluation of the effectiveness of selected corrosion inhibitors for protection of prestressing steels in PCPVs. United States. doi:10.2172/6402157.
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Naus, D J. Thu . "Evaluation of the effectiveness of selected corrosion inhibitors for protection of prestressing steels in PCPVs". United States. doi:10.2172/6402157. https://www.osti.gov/servlets/purl/6402157.
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@article{osti_6402157,
title = {Evaluation of the effectiveness of selected corrosion inhibitors for protection of prestressing steels in PCPVs},
author = {Naus, D J},
abstractNote = {The corrosion protection provided prestressing steel by portland cement-based grout in the presence of sulfide, nitrate, and chloride ion environments was evaluated. Results were compared to those obtained from selected, commercially available petroleum-microcrystalline waxes (petrolatums) compounded with organic corrosion inhibitors. The investigation was conducted in two phases: (1) a review of literature to establish the mechanisms of prestressing steel corrosion, techniques available for protection of prestressing steel in hostile environments, and the performance of structures that have utilized either nongrouted- or grouted-tendon prestressing systems; and (2) a laboratory study to develop relative performance data for portland cement grout and selected commercial petroleum-based greases and waxes containing inhibitors. Conclusions derived from the investigation indicate that (1) sulfide, nitrate, and chloride salts must be excluded from prestressing materials; (2) prestressing materials must be continuously protected from inimical environments; (3) the effectiveness of the protection provided by both the organic- and cement-based corrosion inhibitors is reduced unless the steel is completely covered; and (4) both cement- and organic-based corrosion inhibitors completely protect prestressing materials when properly applied.},
doi = {10.2172/6402157},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 1979},
month = {Thu Mar 01 00:00:00 EST 1979}
}
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Technical Report:
View Technical Report (4.72 MB)
DOI:  10.2172/6402157
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