Zinga is a one-component anti-corrosion zinc coating system that provides cathodic protection to steel comparable with hot-dip galvanising, with the added advantage that it can be applied as though it were a paint.

The system can be used on marine structures, new steel and galvanising, old or worn galvanising, cast iron and aluminium alloys, applied in two or three layers to obtain a maximum thickness (DFT) of 120 to 180 µm, depending on the specification - check the relevant data sheets for more details and specific application details for substrates.

Use Zinga as an alternative to hot-dip galvanisation or metallisation, as primer in a duplex system (active + passive) or as a recharging system for hot-dip galvanisation, metallisation or zinganised surfaces. Apply by brushing, rolling or spraying on clean and rough substrates; the broad range of allowable application conditions that Zinga affords means that very few days are lost during projects due to poor weather. Also available as a spray aerosol.

Features

• Can protect longer than hot-dip galvanising (at the same dft)
• Can be applied on site with brush, spray or short-fibre roller (not for the first coat)
• Can be used to re-coat existing galvanising
• Existing layers of Zinga can be re-coated
• Excellent primer in Duplex system
• Good resistance to mechanical abrasion
• Excellent adhesion
• Extremely flexible
• Can be applied in extreme temperatures
• Weldable to X-ray quality
• Certified to not spread flame or create smoke (BS476 parts 6&7)
• Unlimited shelf-life and unlimited pot-life

Surface Preparation

It cannot be stressed strongly enough that the key to Zinga's long life is in the thorough preparation of the steel substrate to the correct specification. Please always follow the appropriate Zinga UK specification in conjunction with the relevant Technical Data Sheets found in the "Attachments" section above - or contact our technical team on 0113 2455450.

The following information will give a general guide to the coating and its application:

Marine structures

• Remove all crustacean growth using either a UHP water-jet or a high-pressure wash-down
• Dry off
• Blast-clean to Sa2.5 cleanliness

Old or Worn Galvanising, Thermally Sprayed Zinc (TSZ) or Old Zinga

• Steam-clean to remove all contamination from porous surfaces
• Dry off
• Blast-clean as normal

New Steel

• Steam-clean or high-pressure wash-down all surfaces
• Allow to dry
• Blast-clean to a cleanliness standard of Sa 2.5

New Galvanised Steel

• Steam-clean
• Sweep-blast the surface/s at a blast-pressure of 55 psi using a 45o nozzle angle to avoid - Removing any existing zinc thickness.

Cast-Iron

• Steam-clean or high-pressure wash-down
• Allow to dry
• Blast-clean to SA2.5 cleanliness

Aluminium Alloys

• Solvent clean as per SSPC-SP1 Standard
• Blast-clean with aluminium-oxide media grade 3
• Vacuum surface/s before paint application

Note 1: The term "high pressure" means a minimum water-pressure of 10,000psi. Any pressures below this level will not totally remove engrained chlorides.

Note 2: The grit used on all structural steelwork must comply with 50µm and 80µm depending on the type of application). The chosen grit should always be able to achieve a blast roughness of 12.5 to 15 microns. It should be noted that UHP Blasting does not create a profile and should therefore never be used as the sole means of surface preparation. UHPAB is an excellent form of blast-cleaning for marine structures as it removes all crustacean growth, scale, engrained chlorides and invisible contaminants.

Application

Once thoroughly mixed, Zinga can be applied by using a normal paintbrush, a short-fibre roller (not for the first coat) or a conventional or airless spray-gun. When applying Zinga by spraying it must only be thinned with Zingasolv. Please read the appropriate Data Sheet for thinning information.

Zinga can be applied in a wide variety of weather conditions. The application surface temperature range is from -15C to +60C where conditions allow with a maximum humidity of 95% so long as there is 3C minimum between the steel temperature and the dew point. Like all coatings the substrate surface should be free from all types of contamination.

For more specific and detailed recommendations concerning application, please contact our technical team on 0113 2455450. For detailed information about the health and safety hazards and precautions for use, refer to the safety data sheet in the attachments tab above.

Coverage and Consumption

Drying Time

For 40 μm DFT at 20°C in a well-ventilated environment:

• Touch dry: 15 minutes
• Dry to handle: 1 hour
• Fully cured: 48 hours

Overcoating

With a new layer of ZINGA

• Application by brush: 2 hours after touch dry.
• Application by spray gun: 1 hour after touch dry.
• Maximum overcoat time depends on environmental conditions. If zinc salts have formed, they should first be removed.

Approvals

• London Underground
• Land Rover part number
• NATO codification
• ETA / CE registration
• Lloyds Register
• DNV
• MOD
• US Army

Certification

• NORSOK M501 Parts 1& 7 for the oil and gas industry
• ISO 12944 - ISO independent testing for life expectancy
• BS 476 parts 6 & 7 - Fire propagation and surface spread of flame.
• BS6853 – B2 & D8.4`- smoke density and toxic emissions
• BS3900 – cathodic disbondment ASTM G95-07
• EN1179 – Zinc purity
• ISO 2812 – resistance to salt and waste water
• EN13501 – Reaction to fire
• Full list available on our website

References

• Zinga corrodes slower than HDG ( BNF FULMER Report)
• Zinga will re liquidise to become a single layer upon recoating (Royal Ghent University)
• Weld ability of Zinga (Rolls Royce / Nottingham University)
• Galvanic action of Zinga (Royal Ghent University)