What is Seaguard by Zingaseaguard-zinga.com/sites/default/files/downloads/Seag… ·  · 2017-07-14What is Seaguard by Zinga ... the film and enhancing the barrier effect of the

What is Seaguard by Zinga®?• SINGLE COMPONENT COATING• CONTAINS 96% ZINC IN THE DRY FILM• UNLIMITED SHELF LIFE

how can it be used:

• Standalone system

• Primer under suitable topcoats

• As a shop primer

• For repair/recharging for worn galvanizing

• On rebars

Active galvanic Protection The zinc in Seaguard by Zinga® (anode) sacrifices itself, protecting the steel be-neath in a comparable and even better way than hot-dip galvanising. Upon im-pact, the electron flow resulting from a potential difference between the Zinc and steel will prevent the steel from cor-roding.

GAlvanic - no corrosion

Protecting Layer: zinc-systems = active systems

reaction due to air and moisture: O2 + 2H2O + 4e- 40H- Zn Zn2+ + 2e-

Formation of: ZnO

Passive barrier protectionAs the Seaguard by Zinga® oxidises, a layer of zinc salts slowly builds up on the Seaguard by Zinga® surface, closing the film and enhancing the barrier effect of the coating. Next to this, a supplemen-tary barrier protection is provided by the binder in Seaguard by Zinga®. The binder reduces the depletion of the Zinc, pro-viding a long lasting active protection.

non-gAlvanic - corrosion

Protecting Layer: PAINT-systems = PASSIVe systems

reaction due to air and moisture: O2 + 2H2O + 4e- 40H- Fe Fe2+ + 2e-

Formation of: Fe2O3

how does it work:

Easy to apply on siteOnce thoroughly mixed, Seaguard by 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.

Quick drying timeSeaguard by Zinga® has one of the fastest drying times in the coating industry. It is touch dry in around 10 minutes at 20° C/ 68° F (40 µm/1.5 mils DFT.)

does not peel off and is not brittleSeaguard by Zinga® is not a paint and does not behave like a paint. It acts more like the steel below: when impacted with a ham-mer, the Zinc is merely pushed away, bending along with the steel. Therefore, Seaguard by Zinga® can also be bent with the steel to a certain extent.

RechargingOne of the most decisive advantages of Seaguard by Zinga® is that it can be re- charged. Each new layer of Seaguard by Zinga® makes the former layer liquid, so as to form a new homogeneous Seaguard by Zinga® layer.

CAN BE TOPCOATEDIf Seaguard by Zinga® is used as part of a duplex system i.e. it is over-coated with a compatible paint system, the top-coat provides the initial barrier to the elements, but the zinc oxide will still form a second-ary barrier if the outermost layer is com-promised in any way. A “mist-coat/full-coat”* technique is vital and mandatory to prevent excessive sol-vent exposure from hot solvent top coats.

Fire retardant propertiesSeaguard by Zinga® is a unique system that shows fire retardant properties. More- over, it does not spread flames or produce toxic flames.

WeldsSeaguard by Zinga® is one of the few non-specialized coatings that can be welded and applied over welds and has limited burn back.

*Of compatible epoxy primer.

Immersion testAfter 7 days exposure to salt wateR

Seaguard by Zinga®

Another Zinc Spray

Comparison Chart of Seaguard by Zinga® vs HDG and Paint:

PREPARATION OF THE SURFACE:Steam-clean or high-pressure wash-down all surfaces.• BARE METAL:Follow by a grit or slurry blasting to near white metal (SA 2.5, SP 10, NACE 2) to ob-tain a roughness degree Rz 50 to 70.• PREVIOUSLY COATED:Followed by a grit or slurry blasting to near white metal (SA 2.5, SP 10, NACE 2) to obtain a roughness degree Rz 50 to 70.• RUSTY:Followed by a grit or slurry blasting to near white metal (SA 2.5, SP 10, NACE 2) to obtain a roughness degree Rz 50 to 70.• GALVANISED:Steam-clean the surface, followed by a light sweep blast (Sa1, SP7, NACE 4) to remove the zinc salt layer.

How to APPLy Seaguard by Zinga®:Once thoroughly mixed, Seaguard by Zinga® can be applied by:• a normal paintbrush, • a short fibre roller (not for the 1st

coat),• a conventional or airless spray gun.

Seaguard by Zinga® can be applied in a wide variety of weather conditions. The application surface temperature range is from -15° C to +60° C (5° F to 140° F), where conditions allow with a maxi-mum humidity of 95% so long as the steel temperature is 3° C (37.4° F) above the dew point. Like all coatings the sub-strate surface should be free from all types of contamination.

DRYING TIME:Seaguard by Zinga® is touch dry and dust-free in about 10 minutes at 20° C/ 68° F (40 µm/1.5 mils DFT.)

OVERCOATINg:Seaguard by Zinga® can be overcoated with a new layer of Seaguard by Zinga® hour after touch dry.

Seaguard by Zinga® can be overcoated with a compatible paint after 6 to 24 hours, depending on drying conditions. To over-coat Seaguard by Zinga®, use a mist/full coat technique.

TECHNICAL DATA:• Zinc content:

96% (± 1%) by weight

• COLOUR: Grey (Zinc)

• SOLID CONTENT: 80% in weight 58% in volume (ASTM D2697)

• DRY FILM THICKNESS: Max Total 2 layer System, 120 to 80 µm 4.72 to 7.09 mils

• tEMPERATURE RESISTANCE: From -40° C to +150° C From -40° F to 302° F

• Theoretical Spread Rate: 60 µm DFT, 3,62 m²/kg 2.36 mils DFT, 197.14 ft²/gl

• VOC: 474 g/L 3.96 lb /gl

• FLASH POINT: 47° C (116.6° F)

• REDUCER: Seaguardsolv by Zinga only®

• SHELF LIFE: Unlimited

Seaguard by Zinga® characteristics hot-dip

galvanizationpaint

Active cathodic protection Easy application on site

Reloadable with Seaguard by Zinga®

Overcoatable

Application under extreme circumstances

(high & low temperatures and in humid environments)

- ⁄*

Unlimited shelf life - Contact with potable water = ok** ⁄ *

Flexible layer, adjusts itself to the metal

structure (resistant to temperature variations and mechanical shocks)

Welding on coated steel*** The structure keeps its form during

application. * Requires special paints.

** Authorisation depends on local legislation.*** Please contact a Seaguard Film Galvanizing System representative for more information.

Seaguard by Zinga® RELOADING:Another of Seaguard by Zinga®’s unique characteristics is its ability to re-liquidise when a new coat of Seaguard by Zinga® is applied onto an existing Seaguard by Zinga® layer to form a single homogeneous layer. This ensures a massive cost saving in on-going maintenance, because the old Seaguard by Zinga® layer does not need to be removed before re-coating with a new Seaguard by Zinga® layer (a removal of contaminants is required though).

Seaguard by Zinga® is an iSO 12944 product:

• Confidence that the specified corrosion protection will be fit for purpose

• Life expectation based on scientific tests

• A universally accepted standard

Corrosion zones:

• C5 M: Coastal zone with high salinity

• C5 I: Industrial zone with high humidity and aggressive environment

• Im2: Immersion in salt water

• Im3: Subterranean

life expectation:• Medium corrosive environment:

Life expectation between 5 and 15 years

• Highly corrosive environment: Life expectation more than 15 years

Available Sizes:Seaguard by Zinga® is available in a range of sizes: 1 kg (0.10 gl), 2 kg (0.20 gl), 5 kg (0.49 gl), 10 kg (0.98 gl) and 25 kg (2.47 gl.)Seaguard by Zinga® is also available as an aerosol and is sold as 500 ml (16.91 oz) Seaguard Zincspray by Zinga®.

A thin film of gold dust was applied on top of a first dry coating of Seaguard by Zinga®. The coating was pho- tographed using a strong microscope (µm scale).

Seven days later, a second coating of Seaguard by Zinga® was applied on top of the gold dust. The gold dust becomes fully in-tegrated within the two coatings, proving that the homogenisation of the two Seaguard by Zinga® layers has actu-ally taken place.

The same test has been done with a zinc rich epoxy paint. The layer of gold dust re- mains intact between the two paint layers. The gold film is clearly visible, demonstrating that the two layers remain separate layers.

With hot-dip galvanization, deformation of the struc-ture is possible due to the use of high temperatures of molten Zinc. There is also potential for hydrogen em-brittlement within welds.

The descriptions and guidelines shown in this literature should be used as a general reference only. For any further technical information please contact our Technical Service. Contents of this Brochure/Catalog are based on the latest information available at the time of publication. CMP / Seaguard International assumes no res-ponsibility for the accuracy of the information contained herein. Product specifica-tions are subject to change without notice.

Seaguard International, LLC 200 Amedeo Ct, Suffolk VA 23434, [email protected] ∙ seaguard-zinga.com