Yellow Corrosion Inhibitor Construction Chemical

CETEX - CIA, Corrosion Inhibiting Admixture, when added in the fresh concrete mix, inhibits the corrosion of embedded reinforcement steel and other metallic component. It complies with ASTM-G 109.

MECHANISM
Corrosion of reinforcing steel in concrete has always been a problem. When reinforcing steel corrodes, one of the primary substances produced is ferric oxide (rust). Rust occupies several times the initial volume of the steel. This increase in volume creates stresses within the concrete surrounding the corroding reinforcing steel. These stresses eventually cause spalling of the protective concrete cover, which may create the possibility of catastrophic structural failures. As the corrosion process accelerates, the cross-section of good reinforcing steel decreases. This increases stresses in the steel that can exceed safe limits. Typically in the alkaline environment of concrete, a passive (protective) layer (ferrous hydroxide) is formed and remains fairly stable, protecting the reinforcing steel from active corrosion. In the presence of chloride ions or carbonates, this passive layer breaks down and corrosion of the reinforcing steel is accelerated. CETEX-CIA reacts with the iron ions, increasing the stability of the passive layer.

PROPERTIES
Type : Inorganic salt solution
Color : Yellowish
Specific Gravity : 1.40 +/- 0.02 at 25oC
Chloride : Nil
pH : Alkaline