FAIRCRETE C (NITRITE FREE)BIPOLAR CORROSION INHIBITOR
CONCRETE ADMIXTURE
What is Corrosion ?Corrosion is the destructive attack to metal by a chemical or
electrochemical reaction with its Environment. The terms corrosion
and rusting are often used interchangeably. The term “rust” typically
is applicable to ferrous materials, iron and steel. The most term to
use is "corrosion" because it is inclusive of non-ferrous metals as
well.
Passivity of SteelUnder certain conditions steel is passive, where the corrosion rate for
the metal is relatively low. Iron is considered an active-passive metal
and therefore steel behaves similarly. Passivity, defined simply,
refers to a loss of chemical reactivity under certain conditions. Steel
achieves this by having a passive film form along its surface.
Corrosion FactorsThe cement paste in concrete is alkaline with a pH typically between
12 and 14. This paste surrounds reinforcing steel in concrete. Many
researchers believe this alkaline environment facilitates the protective
passive film around the steel. The passive film is not invulnerable,
though. It can be damaged both chemically and mechanically.
Benefits Corrosion protection for embedded reinforcing steel, especially
from chloride attack Protection from the destructive influences of reinforcement
corrosion. No negative influences on the properties of both the fresh and the
hardened concrete. Non- toxic and eco friendly. Penetrates to rebar over a prolonged period and arrest corrosion
of rusting steel. Nitrite and chromate free. Effective if the presence of high amount of chloride content. Non deleterious unlike conventional corrosion inhibitors. Does not affect mechanical strength of concrete/ mortar.
DescriptionFAIRCRETE C (NITRITE FREE) is a corrosion inhibitor system which
works on the Bipolar Inhibitor Mechanism (B.I.M.). By using FAIRCRETE C
(NITRITE FREE) both the anodic and cathodic reactions of the
electrochemical corrosion process are reduced. The product forms a profile
on the steel surface which delays the onset of corrosion and hence this
molecular layer continues to protect rebar by its constant presence.
FAIRCRETE C (NITRITE FREE) is a liquid concrete admixture by virtue of
its high vapor pressure & affinity for the embedded metal diffuses through
densest concrete to reach the corroding steel.
Uses
Typical Uses are in : Concrete roads Bridges Tunnels Cooling towers, Chimney and Power plants Retaining walls Railway sleepers and Mooring Berths. Jetties and Docks Industrial plants Multi storey car parks RCC elements / structures exposed to corrosive environment Marine and Coastal structures
FAIRCRETE C (NITRITE FREE) is a bipolar corrosion inhibitor designed for reinforced concrete particularly at risk of corrosion. It specially provides protection on from chloride induced corrosion.
Typical Properties
BASE : Water based
organic corrosion inhibitor.
Appearance : Brownish Colour
Liquid.
Odor : Mild Ammonical
Odor
Specific Gravity : 1.040 to 1.060 at 27
+ 2ºC
pH : 10 ± 1
Packing & Dosage
FAIRCRETE C (NITRITE FREE) is supplied in 1,5,10,50,100
and 200 ltrs. The dosage of FAIRCRETE C (NITRITE FREE) is
0.5 % to 1 % by weight of cement, depending on the grade of
concrete.