Relationships between anodic polarization and corrosion of steel in concrete

Journal Article · Mon Nov 01 04:00:00 EST 1993 · Cement and Concrete Research; (United States)

DOI:https://doi.org/10.1016/0008-8846(93)90079-O· OSTI ID:5857168

Baweja, D; Sirivivantnanon, V ^[1]; Roper, H ^[2]

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1. CSIRO Div. of Building, North Ryde (Australia). Construction and Engineering
2. Univ. of Sydney, Redfern (Australia). School of Civil and Mining Engineering

Corrosion of reinforcement in concrete is a topic of concern mainly because of the high cost of repair and rehabilitation of concrete structural elements. There is as yet no method of assessment that would enable the rapid and accurate prediction of the extent of corrosion of reinforcing steel in concrete on site. Half cell potential techniques commonly used in situ give only probabilistic information on corrosion activity. Research effort is thus needed in both investigating and developing methods to assess more accurately the corrosion characteristics of steel in concrete with an ultimate view of site application. Long-term investigations on chloride induced corrosion of steel reinforcement have been conducted on a series of concrete slab specimens to establish relationships between electrochemical data and chloride induced corrosion of steel reinforcement. Potentiodynamic anodic polarization procedures were used to monitor corrosion of steel reinforcement in concrete slab specimens over a period of four years. A statistically significant relationship between the area under the corrosion current and time relationship and the weight loss of steel reinforcement was established. Assessments of corrosion rates of steel in the concretes studied were thus verified. Reinforcement corrosion was found to be localized under the high chloride conditions occurring mainly in an area adjacent to the chloride source.

• OSTI ID: 5857168
• Journal Information: Cement and Concrete Research; (United States), Journal Name: Cement and Concrete Research; (United States) Vol. 23:6; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
360604 -- Materials-- Corrosion
Erosion
& Degradation
42 ENGINEERING
420500 -- Engineering-- Materials Testing
ALLOYS
BUILDING MATERIALS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COMPOSITE MATERIALS
CONCRETES
CORRELATIONS
CORROSION
HALIDES
HALOGEN COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MATERIALS TESTING
NONDESTRUCTIVE TESTING
POLARIZATION
REINFORCED CONCRETE
REINFORCED MATERIALS
STEELS
TESTING