Description
Description:
Nitozinc Primer Std is supplied as a two-component system based on metallic zinc and epoxy resin which on mixing gives
a grey colored liquid.
Uses:
Nitozinc Primer Std is the recommended anti-corrosive primer for exposed steel reinforcement and structural steel on site. The product actively resists corrosion and avoids the generation of incipient anodes in immediately adjacent locations.
Advantages:
- Active ‘Zinc-rich’ system combats corrosion by electro chemical means.
- Formulated for use with Nitocote protective coatings and enamel paints
- Two component product – easy to mix and use.
Technical support:
Fosroc offers a comprehensive range of high-performance, high-quality concrete repair and construction products. In addition, Fosroc offers a technical support service to specific errs, end-users and contractors, as well as on-site technical assistance in locations all over the country.
Design Criteria:
One or two coats of Nitozinc Primer Std are generally required, dependent largely on the nature and profi le of the substrate. Nitozinc Primer Std is overcoat able generally between 30 minutes and one hour after the application of first coat. Application of top coating may also proceed at this time. At elevated temperatures, the recoat able and overlay times will be reduced. The minimum application temperature for Nitozinc Primer Std is 100C. Consult the local Fosroc office for further information.
Specific cation clauses
Structural steel
The structural steel primer shall be Nitozinc Primer Std, a two-component zinc rich liquid packed and supplied ready to use. An unbroken 25 microns thick coating shall be capable of providing ’active’ galvanic protection. It shall be of suitable
viscosity to enable the coating to penetrate into imperfections and pits within the surface of the structural steel. The formulation of the primer shall be such that drying occurs to allow the application of the topcoat to proceed after 20 to 45 minutes at 35 0C or after 30 minutes to one hour at 200C.It shall be fully compatible with the Nitocote Protective coating
or other enamel paints.
Application instructions
Preparation
Expose fully any corroded steel and remove all loose scale and corrosion deposits. Steel should be cleaned to a bright
condition paying particular attention to the back of exposed steel bars. Grit-blasting is recommended for this process. Where corrosion has occurred due to the presence of chlorides, the steel should be high-pressure washed with clean water immediately after grit-blasting to remove corrosion products from pits and imperfections within its surface.
Application:
The application of Nitozinc Primer Std must take place as soon as possible to a dry steel surface after completion of
the preparation work but always within 3 hours. Although a two-component product, it should be stirred thoroughly before
use in order to redisperse any settlement.
Apply one full and unbroken coat of Nitozinc Primer Std by suitable brush. making sure the surfaces of the steel are
properly coated. A small brush is generally suitable for this purpose. Allow to dry fully before continuing. If in doubt of
having achieved an unbroken coating, a second application should be made as soon as the fi rst coat is fully dry (generally
between 30 minutes and one hour).
The primed surfaces should not be left exposed to the elements for longer than necessary before overcoating. Nitozinc
Primer Std will, however, protects steel under clean interior exposure conditions for a period of several months. In nonaggressive exterior environments, a maximum interval of 14days will be tolerated but in industrial and/or marine environments this interval should be reduced to the practical minimum.
Low temperature working
The minimum application temperature is 100C. The material should not be applied when the substrate and/or air temperature is 100C and falling. At 100 C static temperature or at 100C, and rising, the application may proceed.
Cleaning
Nitozinc Primer Std should be removed from tools, equipment and mixers with Nitozinc Sol immediately after use.
Estimating
Packaging
Nitozinc Primer Std 20 litre Pack
Nitofl or Sol 5 litre containers
Storage
Shelf life
Nitozinc Primer Std has a shelf life of 6 months if kept in dry store in the original, unopened containers. If stored at high
temperature and/or high humidity conditions the shelf life may be reduced.
Precautions
Health & Safety instructions
Nitozinc Primer Std and Nitofl or Sol should not come in contact with the skin and eyes or be swallowed. Ensure adequate
ventilation and avoid inhalation of vapors. Some people are sensitive to resins, hardeners and solvents. Wear suitable
protective clothing, gloves and eye protection.
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