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Title: Cathodic polarization and protection of simulated prestressed concrete pilings in seawater

Abstract

Experiments were conducted to determine the effectiveness of localized cathodic polarization for reducing corrosion of simulated prestressed concrete piles containing continuous and segmented tendons exposed to seawater. Conductive rubber was used as the anode material. Corrosion of the steel was enhanced for most specimens by admixing calcium chloride (CaCl[sub 2]) during concrete pouring. Specimens were polarized cathodically at constant potentials (current on) ranging from [minus]0.72 V[sub SCE] to [minus]1.10 V[sub SCE]. The magnitude of impressed current and its distribution along the embedded steel were monitored as a function of exposure time and level of polarization. Potential distributions for the continuous and segmented tendons were measured also. The level of cathodic polarization was assessed as a function of position along the specimens by the depolarization method and by post-test visual inspection. Protection was achieved where instant-off potentials were more negative than [minus]0.75 V[sub SCE]. Polarization was negligible at heights > [approximately]1 dm above the anode. Results were presented within the context of protecting marine pilings from corrosion.

Authors:
 [1];  [2];  [3]
  1. (Florida Atlantic Univ., Hawthorne, NY (United States))
  2. (Florida Atlantic Univ., Boca Raton, FL (United States). Center for Marine Materials)
  3. (Bureau of Materials and Research, Gainesville, FL (United States). Florida Dept. of Transportation)
Publication Date:
OSTI Identifier:
5111704
Resource Type:
Journal Article
Journal Name:
Corrosion (Houston); (United States)
Additional Journal Information:
Journal Volume: 50:3; Journal ID: ISSN 0010-9312
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; FOUNDATIONS; CATHODIC PROTECTION; PRESTRESSED CONCRETE; REINFORCED CONCRETE; CHLORIDES; COASTAL WATERS; CORROSIVE EFFECTS; SEAWATER; STEELS; ALLOYS; BUILDING MATERIALS; CHLORINE COMPOUNDS; COMPOSITE MATERIALS; CONCRETES; CORROSION PROTECTION; HALIDES; HALOGEN COMPOUNDS; HYDROGEN COMPOUNDS; IRON ALLOYS; IRON BASE ALLOYS; MATERIALS; MECHANICAL STRUCTURES; OXYGEN COMPOUNDS; REINFORCED MATERIALS; SUPPORTS; SURFACE WATERS; WATER; 360604* - Materials- Corrosion, Erosion, & Degradation; 423000 - Engineering- Marine Engineering- (1980-)

Citation Formats

Pangrazzi, R., Hartt, W.H., and Kessler, R. Cathodic polarization and protection of simulated prestressed concrete pilings in seawater. United States: N. p., 1994. Web. doi:10.5006/1.3293510.
Pangrazzi, R., Hartt, W.H., & Kessler, R. Cathodic polarization and protection of simulated prestressed concrete pilings in seawater. United States. doi:10.5006/1.3293510.
Pangrazzi, R., Hartt, W.H., and Kessler, R. Tue . "Cathodic polarization and protection of simulated prestressed concrete pilings in seawater". United States. doi:10.5006/1.3293510.
@article{osti_5111704,
title = {Cathodic polarization and protection of simulated prestressed concrete pilings in seawater},
author = {Pangrazzi, R. and Hartt, W.H. and Kessler, R.},
abstractNote = {Experiments were conducted to determine the effectiveness of localized cathodic polarization for reducing corrosion of simulated prestressed concrete piles containing continuous and segmented tendons exposed to seawater. Conductive rubber was used as the anode material. Corrosion of the steel was enhanced for most specimens by admixing calcium chloride (CaCl[sub 2]) during concrete pouring. Specimens were polarized cathodically at constant potentials (current on) ranging from [minus]0.72 V[sub SCE] to [minus]1.10 V[sub SCE]. The magnitude of impressed current and its distribution along the embedded steel were monitored as a function of exposure time and level of polarization. Potential distributions for the continuous and segmented tendons were measured also. The level of cathodic polarization was assessed as a function of position along the specimens by the depolarization method and by post-test visual inspection. Protection was achieved where instant-off potentials were more negative than [minus]0.75 V[sub SCE]. Polarization was negligible at heights > [approximately]1 dm above the anode. Results were presented within the context of protecting marine pilings from corrosion.},
doi = {10.5006/1.3293510},
journal = {Corrosion (Houston); (United States)},
issn = {0010-9312},
number = ,
volume = 50:3,
place = {United States},
year = {1994},
month = {3}
}