Study of corrosion behavior of high strength low alloy steel reinforcing bars in industrial and marine environments

Book · Fri Nov 01 04:00:00 EST 1996

OSTI ID:382566

Singh, S K; Hocking, M G ^[1]; Jha, R; Chatterjee, A; Mukherjee, T ^[2]

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1. Imperial Coll., London (United Kingdom). Dept. of Materials
2. Tata Steel, Jamshedpur (India)

Mild steel reinforcing bars embedded in concrete exposed to marine environment are prone to severe corrosion leading to serious damage to the structures. The various technologies developed and adopted to reduce the corrosion of steel reinforcement, have been discussed in this paper along with a new high strength low alloy (HSLA) steel reinforcing bar. The bare HSLA rebars have been tested extensively along with mild steel rebars for comparative study in saline and sulfurous electrolytes in the laboratory by Potentiodynamic tests as well as in natural marine and industrial environments. The HSLA and mild steel rebars embedded in concrete were also tested in saline water by alternate immersion test and by impressed anodic current methods. The bare HSLA rebars showed 2--3 and 1.5--1.9 times better corrosion resistance to mild steel rebars in laboratory and field exposure tests respectively. The HSLA rebars embedded in concrete and exposed to saline water with impressed anodic current of 200 {micro}A/sq. cm showed 2.5 times better corrosion resistance to mild steel rebars. The XRD analysis of the rust formed on the samples of field exposure tests conducted in marine and industrial environments, clearly showed the formation of compounds which reduce the corrosion rate of steel.

• OSTI ID: 382566
• Report Number(s): CONF-960389--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
BENCH-SCALE EXPERIMENTS
BRINES
CATHODIC PROTECTION
CHEMICAL COMPOSITION
CHLORIDES
CLADDING
COATINGS
COMPATIBILITY
CORROSION INHIBITORS
CORROSION RESISTANCE
CORROSIVE EFFECTS
CRACKS
EXPERIMENTAL DATA
FIELD TESTS
LOW ALLOY STEELS
PAINTS
PHYSICAL PROPERTIES
POLYMERS
REINFORCED CONCRETE
SALINITY
ZINC