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Hot-dipping and zinc-spraying are well established ways of protecting steel against rust. These coatings are applied on steel as a means of providing cathodic protection. Cathodic protection arises from the zinc (the anode) sacrificing itself in favour of the base metal (the cathode). In this way the protection of the metal is guaranteed.

Even when the zinc layer is slightly damaged, there is no rust formation underneath. Traditional zinc galvanizing techniques are difficult to apply on-site, but ZINGA can be applied as easily as a paint.

Ordinary paints form a barrier to the air. But once the barrier is broken, rust will spread under the paint and will cause flaking and blistering. Most so-called zinc-rich paints do not solve this problem, mainly because they do not contain enough zinc to ensure adequate cathodic protection.

For better protection use ZINGA

ZINGA protects against rust in two ways:

• galvanic protection (cathodic/sacrificial)

• protection by means of a barrier (organic paint layer)

ZINGA combines the galvanic characteristics of a zinc coating with the barrier protection of an organic paint. As it has 96 pure zinc in its dry film ZINGA provides excellent cathodic protection to steel. The salt-spray test (for 2000 hours) proves that in very aggressive circumstances ZINGA sacrifices itself, protecting the metal surface in a similar way to hot-dip galvanizing.

ZINGA owes its excellent corrosion resistance and galvanic protection capacity to its binder which slows down rust formation (by reducing the disintegration) of the zinc. The zinc in ZINGA becomes the sacrificial anode in relation to the steel, but it rusts much more slowly than an ordinary zinc coating, produced by galvanization or zinc-spraying. (Extract of BNF FULMER report of J.J.B. Ward, Oxfordshire ENGLAND January '92)

• ZINGA can be applied on site; metal structures do not have to be dismantled before treatment (this is usually necessary with hot-dip galvanizing)

• You can use ZINGA to recoat existing hot-dip galvanizing in order to renew the cathodic protection.
• It is not always necessary to grit-blast surfaces. ZINGA can be applied on mildly rusty surfaces after they have been degreased and loose rust has been removed.
• Existing coatings of ZINGA can be painted with a new ZINGA coating (and it is just as effective as the original coating). The two coatings form a single ZINGA layer.
• ZINGA is an excellent primer when a top coat is required (Re duplex systems in which the life of the coating is doubled according to several recognised institutions).
• ZINGA forms an impenetrable barrier with good resistance to mechanical abrasion.
• Adhesion tests have demonstrated that ZINGA has excellent adhesion on steel. Even where it has been damaged by abrasion, ZINGA does not peel off.

Each new film of ZINGA blends perfectly with the previous one. This allows the application of additional protective layers, touching up can also be done at any time at minimal cost. Once a film of ZINGA has been applied, it does not need to be removed when it comes to recoating.

The total integration of different coatings is shown on the pictures alongside.

1. A thin film of gold dust was applied on a first coating of ZINGA.
2. Seven days later a second coating of ZINGA was applied on top of the gold dust.
   The gold dust mixes into the two coatings of ZINGA showing that the mixing of the two coatings is complete !!
3. In contrast to fig. 3 the gold film remains intact between the coatings of ordinary zinc rich paint. The gold film is clearly visible, demonstrating that the two coatings remain as separate layers.

EXCEPTIONAL COATING

ZINGA provides a cathodic protection in various different applications:

• Existing large structures, such as electrical pylons, tubes, pipes, tanks, silos, cornices, bodywork, gates, heating installations, containers, metal frame works, masts etc., which could not be galvanized, can now benefit from cathodic protection by application of ZINGA on site.
• Existing hot-dipped or (cold) zinganized structures (eg. motorway barriers, conveyor belts, power pylons, sheet iron work,) can benefit from long term protection thanks to this technique.
• Structures that would be distorted by hot-dipping can now benefit from cathodic protection with ZINGA.
• ZINGA can be applied in moist conditions and on a damp surface. ZINGA is ideal to touch up damage caused by welding, cuts, drilling, riveting etc.