A method for evaluating the corrosion potential of a cement slurry to reinforcing steel

✍ Scribed by Ping Gu; Yan Fu; Ping Xie; J.J. Beaudoin

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 600 KB
• Volume: 24
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(94)90080-9

✦ Synopsis

A method based on cyclic voltammetry was developed to evaluate the corrosivity of fresh cement slurry containing chloride ions with respect to steel reinforcement corrosion. The principle of this method relies on the investigation of the surface oxidation behavior of reinforcing steel in a cement slurry solution by cyclic voltammetry. Voltammograms of iron or steel were obtained by cycling potential between -1.35 to 0.85 V vs SHE (standard hydrogen reference electrode). The anodic passive current density is used to characterize the level of chloride ion concentration that destroys the passive film. It is suggested that this method could be used as a convenient probe to estimate the "corrosion potential" of fresh cement concrete mixtures.