Zinga Technical Data Sheet.pdf 2w1t3z

Technical data sheet

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TF Zinga.EN 25/10/07-8

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ZINGA ZM-RE-PRO-04-A (01/08/06)

The film galvanising system Zinga is a one pack coating that contains 96% zinc in the dry film and provides cathodic protection to ferrous metals. It can be used as a unique system as an alternative to hot-dip galvanisation or metallisation, as primer in a duplex system or as a recharging system for hot-dip galvanisation or metallisation. It can be applied by brushing, rolling or spraying on a clean and rough substrate in a wide range of atmospheric circumstances. Zinga is also available as an aerosol and is sold as Zingaspray.

Physical data and technical information •

Wet product

Components Density Solid content Type of thinner Flash point VOC •

- zinc powder - aromatic hydrocarbons - binder 2,67 Kg/dm³ (± 0,05 Kg/dm³) - 80% by weight (± 3%) - 58% by volume (± 3%) according to ASTM D2697 Zingasolv 47°C (± 1°C) 474 gr/Lt (EPA method 24)

Dry film

Colour Zinc content

Special characteristics

Non-toxicity

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matt metallic grey (colour darkens after with humidity) 96% (±1%) by weight, with a purity of 99,995% Zinga gives full cathodic protection and conforms to the standard ISO 3549 in regard to its zinc purity of 99,995 % and to the standard ASTM A780 in regard of its use as repair coating for hot-dip galvanisation. atmospheric temperature resistance - minimum : -40°C - maximum : 150°C with peaks up to 180°C pH resistance in immersion: from 5,5 pH to 9,5 pH pH resistance in atmospheric circumstances: from 5,5 pH to 12,5 pH excellent UV resistance A dry layer of Zinga is not toxic and can be used in with potable water, according to the standard BS 6920.

Technical data sheet

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Packing

500 ml 1/4 Kg 1 Kg 2 Kg 5 Kg 10 Kg 25 Kg 250 Kg •

aerosol available as sample (on request) available, packed in undividable boxes of 12 x 1 Kg available, packed in undividable boxes of 6 x 2 Kg available available available only available if adequate mixing is guaranteed

Conservation

Storage Shelf life

store in a cool and dry place unlimited In case of long time storage it is recommended to shake the unopened tin in an automatic shaker at least once every 3 years.

Application data •

System recommendations

Unique system

Duplex system

Stripe-coat Recharging system

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- Zinga is used as a stand-alone system, applied in 2 or 3 layers to obtain a total maximum DFT∗ of 120 to 180 µm. - This system is strongly recommended because of the easy maintenance. In time the layer will become thinner as the Zinga sacrifices itself due to the cathodic protection. A new layer of Zinga can be directly applied once the surface has been properly cleaned and it will re-liquidise and recharge the previous Zinga layer. The DFT of Zinga that should be applied depends upon the remaining Zinga layer. - The system Zinga 2 x 60 µm DFT conforms to the standards NORSOK M-501 syst. 7 and ISO 12944 cat. Im2 and Im3. - In a duplex system, Zinga should be applied in one single application, preferably by spraying, to obtain a maximum DFT of 60 to 80 µm. - The surface of the Zinga should be free of zinc salts and other contaminations prior to application of a topcoat. - Zinga can be topcoated with a wide range of compatible sealers and topcoats. To avoid pinholes when topcoated, use the mist coat & full coat technique. It is recommended to apply a stripe-coat of Zinga by brush on all sharp edges, nuts and bolts and weld areas before the application of the first full layer of Zinga. Zinga can be applied on top of a hot-dip galvanising layer, a metallisation layer or an old Zinga layer in order to renew or enhance the cathodic protection. The DFT of Zinga that should be applied depends upon the existing galvanising layer.

DFT & WFT : dry film thickness and wet film thickness ; to be measured above the peaks of the roughness profile

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Coverage and consumption

Theoretical consumption Theoretical coverage

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Practical coverage •

Environmental conditions during application

Ambient temperature Relative humidity Surface temperature Product temperature

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for 60 µm DFT : 0,28 Kg/m² or 0,10 Lt/m² for 120 µm DFT : 0,55 Kg/m² or 0,21 Lt/m² for 60 µm DFT : 3,62 m²/Kg or 9,67 m²/Lt for 120 µm DFT : 1,81 m²/Kg or 4,83 m²/Lt depends upon the roughness profile of the substrate and the application method

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minimum -15°C maximum 40°C maximum 95% minimum 3°C above the dew point no visual presence of water or ice maximum 60°C During application the temperature of the Zinga liquid must remain between 15 and 25°C. A lower or higher temperature of the product will influence the smoothness of the film when drying.

Drying process and overcoating

Drying process Drying time

Overcoating

Reliquidisation

Zinga dries by evaporation of the solvent. The drying process is influenced by the total WFT, the number of coats applied, the ambient air and surface temperatures and the air circulation. for 40 µm DFT at 20°C in a well-ventilated environment: - touch-dry: after 10 min. - dry to handle: after 1 hour - fully cured: after 48 hours - ready for immersion: after 2 hours - with a new layer of Zinga : - brush : 1 hour after touch dry - spray gun : 1 hour after touch dry - with a compatible paint : after 6 to 24 hours depending on the drying conditions Each new layer of Zinga reliquidises the former Zinga layer so that both layers form one homogeneous layer.

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Instructions for use •

Surface preparation

Cleanliness

Roughness

- The most common method to obtain a clean (and at the same time rough) surface for the application of Zinga is: The metal substrate should first be degreased, preferably by steam-cleaning at 140 bar at 80°C. After that it should be gritblasted or slurry-blasted to cleanliness degree SA 2,5 according to the standard ISO 8501-1 or to the cleanliness degree described in the standards SSPC-SP10 and NACE nr 2. This means that the surface must be free from rust, grease, oil, paint, salt, dirt, mill scale and other contaminants. Once the grit-blasting is completed the surface should be de-dusted with non contaminated compressed air according to the standard ISO 8502-3 (class 2) or in case of slurryblasting the surface should be dried with non-contaminated compressed air. - Another method to obtain a clean surface is UHP water-jetting to cleanliness degree WJ1 according to the standards NACE nr 5 and SSPC-SP12. But keep in mind that this method does not create surface roughness. - This high degree of cleanliness is not needed when Zinga is applied on a hot-dip galvanisation or a metallisation layer, or when it is applied on top of an existing Zinga layer. Please consult with the Zingametall representative. - For substrates that will not be immersed Zinga can be applied on mild flash rust occurring in the allowed time limit. For applications that will be immersed Zinga can only be applied on an SA 2,5 prepared surface unless otherwise agreed with the Zingametall representative. - On small areas or on non-critical applications Zinga can be applied on a surface that is manually prepared to degree St 3 according to ISO 8501-1. Please consult with the Zingametall representative. - Zinga should be applied on a metal substrate that has roughness degree Rz 50 to 70 µm (for total DFT < 280 µm) or Rz 60 to 80 µm (for total DFT > 280 µm) according to the standard ISO 8503-2. This can be obtained by grit-blasting (with sharp particles) but not by shot-blasting (with spherical particles). Make sure that the surface is degreased before the grit-blasting. - This high degree of roughness is not needed when Zinga is applied on a hot-dip galvanisation or a metallisation layer, or when it is applied on top of an existing Zinga layer. Please consult with the Zingametall representative. - On small areas or on non-critical applications Zinga can be applied on a surface that is manually prepared e.g. with a needle gun or a grinding disk, in order to obtain an adequate roughness for Zinga. Please consult with the Zingametall representative.

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Maximum time to application

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Apply the Zinga as soon as possible on the prepared surface. - in dry circumstances : max. 24 hours waiting time - in case of water-cleaning or if the relative humidity is close to 80%: max. 4 hours waiting time If contamination occurs before coating, the surface must be cleaned again as described above. Flash rust can be removed by means of a wire brush.

Special instructions

Stirring

- Zinga must be thoroughly stirred to achieve a homogeneous liquid before application. After a maximum of 20 min. re-mixing is necessary. - During the spraying application, the product must be stirred continuously.

Dilution

Zinga can be diluted with 0 to 5% (volume on volume) of Zingasolv when using airless spray equipment and 0 to 25% for air ed applications. The Zingasolv must be added whilst stirring. Before and after using the spraying equipment, it must be rinsed with Zingasolv. Brushes and rollers should also be cleaned with Zingasolv. Never use White Spirit. - Pour the Zinga through a filter of 100 mesh (150 µm) into the drum. - For the spraying of Zinga, it is better to remove all filters from the pistol and from the drum to avoid blockage. - The spray gun must be equipped with reinforced needle springs.

Rinsing of tools and equipment Special demands for spraying equipment

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Application by brush and roller

Viscosity First layer Type of brush and roller •

Application by spraying with spray gun with gravity cup

Spray viscosity Pressure at the nozzle Nozzle opening •

Zinga is ready for use when applied by brush or roller. Do not dilute. The first layer must never be applied by roller, only by brush, in order to fill the cavities of the roughness profile and to wet the surface. - short hair roller (mohair) - industrial round brush

25 to 35 sec. Ford cup nr. 4 at 20°C 2 to 4 bar 1,7 to 2,5 mm

Application by spraying with spray gun with pressure pot

Spray viscosity Pressure at the nozzle Pot pressure Nozzle opening

25 to 35 sec. Ford cup nr. 4 at 20°C 3 to 4 bar 0,8 to 1,5 bar 1,7 to 2,5 mm

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Application by airless spraying

Dilution Pressure at the nozzle Nozzle opening •

0 to 5% 112 to 280 bar 0,017 to 0,031 inch (0,43 to 0,78 mm)

Other application methods

Please consult with the Zingametall representative. For more specific and detailed recommendations concerning the application of Zinga, please the Zingametall representative. For detailed information about the health and safety hazards and precautions for use, please refer to the Zinga safety data sheet.

Waiver∗

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The information on this sheet is merely indicative and is given to the best of our knowledge based on practical experience and testing. The conditions or methods of handling, storage, use or disposal of the product cannot be controlled by us and are therefore outside our responsibility. For these and other reasons we retain no liability in case of loss, damage or costs that are caused by or that are linked in any way to the handling, storage, use or disposal of the product. Any claim concerning deficiencies must be made within 3 months upon reception of the goods quoting the relevant batch number. We retain the right to change the formula if properties of the raw material are changed. This data sheet replaces all former specimens.