CORROSION INHIBITOR

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 Steel

Under 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 Factors

The 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.

Some examples of chemical damage are carbonation and chloride ingress. Carbonation is the result of the reaction of atmospheric carbon dioxide and hydroxides in the cement paste. Through this reaction carbonates and water are formed. The carbonates that form from this reaction consume the hydroxides present and therefore can lower the pH of the concrete below the value of 8.0. This action causes the steel to depassivate, leaving it susceptible to attack from corrosives. The likelihood of this occurrence is relative to the impermeability characteristics of the concrete. Adequate depths of the concrete cover for the bars and the use of good quality concrete mixes have, greatly reduced the concern for carbonation and its effect on corrosion. Ingress of chlorides, on the other hand, is far more destructive to the steel. These damaging chlorides are common in concrete environments. They are mainly present in marine environments and in deicing salts, however they can also be due to concrete admixtures containing chlorides and chloride contaminated cements, aggregates, and batch water.

Concrete is a permeable material and thus will absorb moisture. Different mixtures of concrete have different rates of moisture infusion. Along with moisture, oxygen and chlorides also diffuse through the uncracked concrete to the surface of the steel. A cathodic reaction is induced by the presence of these elements. The moisture and chlorides act as an electrolyte which facilitate the flow of ionic current. The chlorides initiate corrosion and oxygen fuels the reaction. It is reason able to expect that the lower the absorption and permeability of the concrete, the longer corrosion requires to initiate.

The two most common causes of reinforcement corrosion are (i) localized breakdown of the passive film on the steel by chloride ions and (ii) general breakdown of passivity by neutralization of the concrete, predominantly by reaction with atmospheric carbon dioxide. Sound concrete is an ideal environment for steel but the increased use of deicing salts and the increased concentration of carbon dioxide in modern environments principally due to industrial pollution, has resulted in corrosion of the rebar becoming the primary cause of failure of this material. The scale of this problem has reached alarming proportions in various parts of the world.

Corrosion Inhibitors

The rate of corrosion can also be reduced by using corrosion inhibitors. These inhibitors are chemical compounds that reduce the corrosion rate of metals existing in actively corrosive environments. This is accomplished by using corrosion inhibitors or reducing the rate of chloride ingress to the steel reinforcement. Corrosion inhibitor is a liquid added to concrete during the batching process. It chemically inhibits the corrosive action of chlorides on reinforcing steel and pre stressed strands in concrete. It also promotes strength development of the concrete while meeting ASTM C 494, Type C admixture.

New Generation Concrete Admixtures

New Generation Concrete Admixture

 

Definitions

Admixture as a material other than water, aggregates, hydraulic cement, and fiber reinforcement, used as an ingredient of a cementitious mixture to modify its freshly mixed, setting, or hardened properties and that is added to the batch before or during its mixing. Concrete Admixtures are used to enhance the properties of concrete and mortar in the plastic and hardened state. These properties may be modified to increase compressive and flexural strength at all ages, decrease permeability and improve durability, inhibit corrosion, reduce shrinkage, accelerate or retard initial set, increase slump and workability, improve pumpability and finishability, increase cement efficiency, and improve the economy of the mixture.

The admixtures interact with the hydrating cementitious system by physical and chemical actions, modifying one or more of the properties of concrete in the fresh and/or hardened states.

History

 

 

FAIRFLO RMC 100 - High range water reducing cum slump retainer

FAIRFLO RMC 100 is supplied as a brown liquid based Special Polymer. The high water reduction properties makes FAIRFLO RMC 100 ideal for application in precast concrete where high early strength is of paramount importance. The slump retention characteristic is remarkable, with high efficiency in giving a workable mix for longer period. In addition, this admixture gives more cohesive mix & very much suited to pumping of concrete.

FAIRFLO RMC 200 - High performance super plasticizer cum slump retainer

FAIRFLO RMC 200 is a chloride free Special polymer based. It is supplied as a brown solution which instantly disperses in water. The powerful dispersing agent of the high range water reducing super plasticizer can be used in many ways to obtain dense, high strength durable concrete (m-35, m-40, m-45, m-50). the high water reduction properties makes an ideal application in precast concrete , where high early strength is paramount importance when incorporate in concrete increases the workability without risk of segregation & bleeding. FAIRFLO RMC 200 also retains the slump for much longer time which facilitate easy placement.

FAIRFLO RMC 300 - High range water reducer cum retarding super plasticizer

FAIRFLO RMC 300 is supplied as a brown liquid based Special polymer. The powerful dispersing agent of the high range water reducing super plasticizer can be used in many ways to obtain dense, high strength durable concrete. The high range water reduction properties makes FAIRFLO RMC 300 an ideal application in precast concrete where high early strength is of paramount importance. FAIRFLO RMC 300 is chloride free.

Concrete Admixtures - Waterproofing Systems

Concrete Admixtures

Though Concrete Admixture is add-on materials put in the Concrete Mixer, it is not a substitute for sticking to high quality concreting practices. Accelerators, retarders, super plasticizers and air-entraining agents are usually the commonly sold admixtures by Concrete Admixture Manufacturers. Additional admixtures for bonding, shrinkage reduction, damp proofing and coloring are available with select Concrete Admixture Companies. 

Admixtures for Concrete have special instructions of use with cement-concrete mixture. This is a simple process to produce desired properties. It will not affect any feature for installing the required concrete. Appropriate admixture use advice is based on years of testing and Concrete Repair Methods necessary for desired concrete properties.

Use of Concrete Additives is essential to achieve the right building substance as demanded by climatic conditions and project constraints based on geographical locations.

Waterproofing Systems

Our Waterproofing Systems provide adhesion, flexibility to improve work process by reducing water ratio but enhancing compression strength. Products of Waterproofing for Terrace are designed to handle hydrostatic pressures needed in the construction industry. High build properties ensure quick application. 

Waterproofing Solutions provide homogenous mixes for easy application are tough and have low temperature pliability. High resistance to atmospheric agents and bonding properties are only two attractive features. Waterproofing Materials offer high usability and effectiveness in building or tight schedule construction projects. 

Products used for Basement Waterproofing give adhesion, flexibility and high structural strength. The components of Waterproof Coating are usually mixed to form homogenous consistency. This gives ease of application with a brush, trowel or airless spray gun. Such treated surfaces must not receive moisture for the prescribed hours.

Are Construction Chemicals Overrated In The Construction Industry?

Among the many companies manufacturing construction chemicals FairMate is one multinational company ever-changing with technological updates to provide the best service at all times. 

FairMate has a product range covering waterproofing solutions and concrete industrial products. When one speaks of construction chemicals it is meant we are talking about a group of chemicals. This group of chemicals is segregated because they are used both before and after various construction stages as an additive. The construction chemicals are applied on concrete surfaces or added to react with the basic mixture and develop the properties of concrete to give the necessary hardness.

The construction chemicals are usually used for commercial buildings and infrastructure projects involving roads, highway repairs, dams and bridges. In case of city or residential buildings a totally new construction on an empty site is possible taking care of any obstacles with the right construction chemicals. 

Concrete architecture and buildings are constructed at any time of the year and anywhere on the globe. As such, a variety of environmental as well as raw material availability factors influence the strength of the erected structures. To facilitate the optimum quality development, the proper construction stages need to be identified where the chemicals can be added. The right construction chemical is then chosen from a range of chemical formulations which have been crafted for various applications. These applications can take the form of Adhesive to surface support, Grouts, Waterproofing Compounds etc.

The Real Estate and the chemical industry are growing at a pace necessary to keep up with the building demands. The global access of the latest technology has played quite a significant role in bridging the gap of demand and supply in the construction chemicals sector. Construction chemicals are product and process-time sensitive. They could pose a problem to the DIY category needing some sort of experienced guidance. Even professional technicians who use them on a regular basis have to follow exact instructions to use them with care depending upon the local humidity and temperature conditions.

Renovation and rehabilitation of old buildings can be undertaken after due examination of the foundation structures and how well the construction chemicals will help in contributing to the success of the project. Similarly, infrastructure projects may need repair or renovation of existing concrete structures in addition to erecting new edifices. Construction chemical products are construction activity specific. Since the development of infrastructure and newer commercial complexes catering to new residential complexes are proceeding at a rapid pace, the demand for these chemicals is going to dominate the construction scenario of the future.

You may want to search for different brands of these Construction Chemicals for purposes like waterproofing and road constructions. You can learn more about construction chemicals by visiting the website fairmate.com .

FairMate - INDUSTRIAL FLOORING

A wide range of cementitious and resin based industrial flooring system. FAIRTOP systems are monolithic, metallic, non-metallic floor hardeners for heavy to light duty floors and also ensures maintenance free industrial floor with high abrasion and chemical resistance. FAIRSCREED systems are based on various Epoxy and MMA resins to give desired performance.

FAIRTOP FAST FLOOR - Seamless, self smoothing hardwearing Flooring system
FAIRTOP FAST FLOOR is a cementitious self smoothing flooring designed for ware house and industrial floor when strength and durability are high priority. FAIRTOP FAST FLOOR is a blend of selected cements, hard wearing graded aggregates modified with special polymers and flow agents. It has a w/p ratio of 0.18.

FAIRTOP - Hard wearing, abrasion resistant monolithic industrial flooring compound
FAIRTOP is a hard wearing, ready to use, factory controlled, dry shake, cementitious material containing aggregates & special additives which offers resistance to abrasion and wear. FAIRTOP makes a floor with nondusty, non-slip, dense and tough characteristics.

FAIRTOP METALLIC - High strength metallic topping
FAIRTOP METALLIC is a screedable, iron aggregate cementitious system which is designed to provide a thin, high strength topping for repairing surfaces subjected to heavy traffic and abrasion. It is formulated for application at thickness of 8 to 10mm.

FAIRSCREED SL - Epoxy based self leveling screed
FAIRSCREED SL is supplied as a three pack product, consisting of base, hardner and graded aggregate components, all preweighed and ready for mixing. FAIRSCREED SL has been designed to provide a hard wearing, impervious, seamless floor finish which is hygienic and easy to clean. FAIRSCREED SL is typically applied at a thickness of 2 to 3mm.

FAIRSCREED EP - Heavy duty epoxy based floor screed

FAIRSCREED EP is an extremely high strength floor topping to resist abrasion, impact and chemical contact. At the same time, produces a safe and non-slip finish. for personnel and vehicular traffic. It is applied on concrete floors, as a 4 - 6 mm thick topping over a primer, and can be sealed in areas where high degree of cleanliness is required with SAFECORE SEALER or SAFECORE EP (F) Epoxy resin sealer or floor coating

FLOORSEAL C - Epoxy floor sealer & surface hardener
FLOORSEAL C is a ready to use, brush applied two part epoxy based sealer and surface hardener for concrete floors. FLOORSEAL C is based on solvented epoxy resin which penetrates the pores of the concrete and seals the surface completely and acts as a barrier for penetration of oils, grease, mild chemicals, water etc.

FairMate - Concrete Admixture

Concrete Admixtures

A variety of chloride free and chloride based concrete admixtures for increasing the workability of concrete which includes , Normal plasticizers, Superplasticisers, Retarders, Slump retainers and Accelerators etc. Admixtures develop concrete with high durability and strength. Admixtures in the form of fibres help to make a concrete/plaster more workable and durable.

Products:

 

FAIRFLO - Super plasticiser

FAIRFLO is a high range water reducing admixture for concrete conforming to BS 5075 part 3, ASTM C-494 type 'F' & IS 9103 - 2003. FAIRFLO is supplied as brown liquid based on sulphonated Napthalene condensates. The high water reduction properties makes FAIRFLO ideal for application in precast concrete where high early strength is of paramount importance. FAIRFLO can be used to reduce water upto 12 to 30% for a given workability leading to increased early and ultimate (28 days) strength.

FAIRCRETE R2 - Retarding plasticiser

FAIRCRETE R2 is a retarding water reducing admixture conforming to IS 9103-2003, BS-5075 Part-I, IS 9103 : 2003, ASTM C-494 type 'D'. FAIRCRETE R2 is based on processed lignosulphonates. It acts as both a setretarder and as a plasticiser. At higher temperature concrete hardens more rapidly and may impose problems with placing and finishing of concrete. As a plasticizer, it helps in reducing water/cement ratio by 8 to 10% for a given workability and strength.

FAIRFLO RMC (M) - High performance super plasticiser cum slump retainer

FAIRFLO RMC(M) is a high range water reducing admixture for concrete conforming to BS 5075 part 3, ASTM C-494 type 'G' & IS 9103 - 2003. FAIRFLO RMC(M) is a sulphonated Naphthalene carboxylated acrylic ether co-polymer based superplasticiser. This admixture gives more cohesive mix and makes a concrete suitable for concrete.

FAIRFLO R13 - High range water reducing and retarding plasticiser

FAIRFLO R13 is a high range water reducer & retarding admixture for concrete conforming to BS 5075 part 3, ASTM C-494 type 'G' and IS 9103 - 2003. FAIRFLO R13 is supplied as brown liquid based on modified sulphonated Naphthalene polymer. FAIRFLO R13 when incorporated in concrete mix increases the workability without additional water, thus leading to easy placement and finishing without the risk of segregation and bleeding.

FAIRFLO HSP - High performance concrete superplasticiser

FAIRFLO HSP is a high performance polycarboxylic based concrete superplasticiser. FAIRFLO HSP has been primarily developed for applications in the premixed and precast concrete industries where highest durability and performance is required.

FAIRCRETE RMW - Integral waterproofing additive for concrete and plaster

FAIRCRETE RMW is an integral, high performance waterproofing additive based on high performance polymers, which reduces the permeability throughout the depth of concrete. It confirms to IS 2645 - 2003. FAIRCRETE RMW is approved by Bureau of Indian Standard vide ISI registration no.CM/L7648592

FAIRCRETE W - Chloride based accelerating plasticiser

FAIRCRETE W is a chloride based plasticizer for accelerating the setting time of plain cement concrete for early development of strength confirming to IS 9103-2003. FAIRCRETE W can be used for providing increased resistance to frost damage during and after construction of hollow blocks. It can be used to increase the rate of strength development.

FAIRMATE - Waterproofing Systems

WATERPROOFING SYSTEMS

Complete solution for water leakage by filling pores by crystallization, acrylic modified waterproofing coating, polyurethane coating, epoxy coating, Coal tar cold applied coating, waterproofing screeds and instant water plugging compound. Waterproofing by using 3 to 4mm thick membrane sheets is a new concept adopted for large scale construction works.

Our Waterproofing Systems provide adhesion, flexibility to improve work process by reducing water ratio but enhancing compression strength. Products of Waterproofing for Terrace are designed to handle hydrostatic pressures needed in the construction industry. High build properties ensure quick application. 

Waterproofing Solutions provide homogenous mixes for easy application are tough and have low temperature pliability. High resistance to atmospheric agents and bonding properties are only two attractive features. Waterproofing Materials offer high usability and effectiveness in building or tight schedule construction projects. 

Products used for Basement Waterproofing give adhesion, flexibility and high structural strength. The components of Waterproof Coating are usually mixed to form homogenous consistency. This gives ease of application with a brush, trowel or airless spray gun. Such treated surfaces must not receive moisture for the prescribed hours.