Influence of N
,N
′-dimethylaminoethanol as an inhibitor on the chloride threshold level for corrosion of steel reinforcement

The influence of nitrite concentration on the corrosion of steel immersed in three simulated pH environments that really exist on the surface of steel in concrete has been investigated by comparing and analyzing the change of threshold level of Cl- and NO2-/Cl- mole ratio. The results indicate that with the presence of nitrite, the corrosion of steel can be inhibited effectively. Chloride threshold level increases with the increasing of nitrite concentration and highly alkaline environment plays an important role in assisting nitrite to inhibit corrosion. The use of NO2-/Cl- mole ratio as the parameter to guarantee the inhibition efficiency is suitable in highly alkaline environment, but not appropriate in weakly alkaline and neutral environments.

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Improved engineering model for the propagation stage of chloride-induced pitting corrosion of steel reinforcement

Third International RILEM Workshop on Testing and Modelling Chloride Ingress into Concrete ◽

10.1617/2912143578.017 ◽

2005 ◽

Author(s):

J. Gulikers

Keyword(s):

Pitting Corrosion ◽

Steel Reinforcement ◽

Engineering Model ◽

Corrosion Of Steel ◽

Propagation Stage

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Experimental Assessment of Rebar Corrosion in Concrete Slab Using Ground Penetrating Radar (GPR)

International Journal of Corrosion ◽

10.1155/2018/5389829 ◽

2018 ◽

Vol 2018 ◽

pp. 1-10 ◽

Cited By ~ 2

Author(s):

Ahmad Zaki ◽

Megat Azmi Megat Johari ◽

Wan Muhd Aminuddin Wan Hussin ◽

Yessi Jusman

Keyword(s):

Ground Penetrating Radar ◽

Structural Damage ◽

Concrete Slab ◽

Steel Corrosion ◽

Steel Reinforcement ◽

Reinforcement Corrosion ◽

Dc Power ◽

Reinforcement Bar ◽

Ground Penetrating ◽

Corrosion Of Steel

Corrosion of steel reinforcement is a major cause of structural damage that requires repair or replacement. Early detection of steel corrosion can limit the extent of necessary repairs or replacements and costs associated with the rehabilitation works. The ground penetrating radar (GPR) method has been found to be a useful method for evaluating reinforcement corrosion in existing concrete structures. In this paper, GPR was utilized to assess corrosion of steel reinforcement in a concrete slab. A technique for accelerating reinforcement bar corrosion using direct current (DC) power supply with 5% sodium chloride (NaCl) solution was used to induce corrosion to embedded reinforcement bars (rebars) in this concrete slab. A 2 GHz GPR was used to assess the corrosion of the rebars. The analysis of the results of the GPR data obtained shows that corrosion of the rebars could be effectively localized and assessed.

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