Protecting Structures Naturally...

Sector

Coastal Zones



The entire coastal belt of the Indian peninsula is considered to be extremely corrosive belt. Steel and other ferrous metal along the coastline are susceptible to corrosion, which is mainly initiated by chloride ions present in the sea salts. It is further sustained by the oxygen present in the atmosphere, which diffuses through the moisture film to the surface of the metal.


Corrosion of reinforcing steel is one of the most important causes of deterioration of concrete structures in coastal environment. High permeability concrete, poor design detailing and construction defects such as inadequate depth of cover allow the ingress of salt and moisture into the concrete. High concentration of salt and moisture result in accelerated corrosion of reinforcing steel thereby significantly deteriorating the concrete structure.

Concrete structures in coastal areas can be distinguished vis-à-vis corrosion: The submerged zone (under seawater), the splash and tide zone (intermittently wet and dry) and the atmospheric zone (well above the high tide level). Each of the above zones has very different corrosion characteristics. Corrosion below the water level is limited by low oxygen availability and conversely lowers chloride and moisture content limit the corrosion rate above high tide level. Corrosion is most severe within the splash and tidal zones where alternate wetting and drying result in high chloride and oxygen content. Atmospherically exposed structures (buildings) are subjected to corrosion from airborne salts and moisture from atmosphere. The quality of the concrete and the depth of cover play a major role in the ingress of chloride Hence it becomes very important to protect new and old structure with proper coatings inhancing durability of such structures

Admixtures: Multiplast® ReProtect Reinforcement Protection Additives in the construction stage
Multiguard®, Multithane®, Flexithane®, Powerdek®, Arourthane® and ArmourTuff® range of Waterproofing coatings. View products
Concrete Repair products, Primemix® RM and FerroShield® MCI2000, surface applied corrosion migrating coating. View products
Floorkrete® flooring products. View products
Multicoat® protective coatings. View products

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