Corrosion control made easy using zinc tape.
A zinc tape that provides a corrosion control solution to new and existing above ground plant and transport system.
Economical many application
Easy to apply proven product
The product consists of a zinc tape of high purity (99.95% of the chemical mass of zinc) with a nominal thickness of 0.080 mm.
This tape is supplied with an adhesive of a nominal thickness of 0.025 mm, which can resist continuous operating temperature of 80◦C and which reacts under electro – conductive pressure.
The adhesive layer is covered by a silicone paper tape, which protects the band from getting damaged or polluted until the tape is applied.
The product is available in two forms: on rolls, whose width and length are shown in the table below in shapes, based on the client need
The product is designed to cover the surface of iron, steel, aluminum and light metals in order to product them from corrosion.
This is achieved by putting our product in contact, through proper pressure, with the surface that needs to be protected from corrosion.
The adhesive coat, which is applied only on one side of the zinc tape, consist of a matrix of adhesive and a percentage of zinc powder.
Through the addition of zinc powder, we have achieved the most important effect, which is making the adhesive itself electro conductive.
This process allows the adhesive to create an electrical couple between the surface that needs to be protected and the zinc tape, so that the zinc can act galvanic anode.
The diagram on the left shows the application of our zinc tape on a steel surface. It can be seen that the thickness of the adhesive layer always remains the zinc granules are dispersed evenly throughout the adhesive layer.
These granules are necessary to enable the adhesive to be electro conductive and to assure a continuous metallic contact between zinc and steel.
As a consequence of the unique manufacturing process and the high purity of the employed zinc, the band has an absolutely homogeneous and isotopic microstructure, which cannot be found in other protection systems. For this reason. The corrosion process is suppressed with no pitting or any form of local corrosion attack.
The main features are:
Stopping any direct corrosion;
Active anticorrosive protection thanks to the electrical contact between the surface to be protected and the zinc layer, which, in the presence of an electrolyte, reacts as a sacrificial anode;
Presence of an adhesive layer, anchored on the surface to be protected, which is an additional defense against corrosion,
The coating with a zinc layer assures cathodic protection of metallic surfaces for a time, that,
In most cases, is equal or longer than the lifetime of the structure to be protected.
Prevention of Galvanic Corrosion
The point of contact between light alloys and iron materials can be subjected to corrosion. When these two materials get in both electrical and electrolytical contact, a galvanic process begins.
The lectrolytical contact arises when a solution (usually rain-water) seeps between the two surfaces.
This contact can even be caused by moisture between the two surfaces or by a chemical non-homogeneity of one of the two surfaces because of the presence of oxides, dirt, etc.
Since the electrochemical potentials of steel and iron materials are more electropositive than light alloys. They can cause corrosion. Therefore light alloys become the sacrificial anode.
These problems can be avoided by means of insulating materials (generally made of plastic or gum), which can be put between the two surfaces, in order to break the electrical and electrolytical contact. But, since the insulating material dose not adhere well and since it wears out quickly, protection against corrosion is no longer guaranteed. Such damage can even cause mechanical problems, such that the two surfaces are no longer connected correctly.
This will not happen when employing our zinc tape with electro-conductive adhesive.
Through our zinc coating in contact with iron surface, passive and active protection can be achieved:
Passive protection due to the composition of the zinc coating and the adhesive, which adhesive well avoiding any ingress.
Active protection because the difference of potential between the two surfaces decreases.
The potential of zinc is very similar to that of the light alloy and so the zinc tape acts as the sacrificial anode instead of the light alloy.
Advantage of zinc tape
A particular cleaning of surfaces is not required
No Primer required
Ensures a much longer life-span (from 1.4 to 2.0 times more) than that of hot-dip galvanizing or other zinc coatings of the same mean thickness.
It can be applied in multiple layers, whenever an extra-thick coating is required
Enables those areas where the hot-dip galvanizing layer has been damaged to be reconditioned.
Many “onsite” applications
Can be over painted
No maintenance during the structure life
Ideal for difficult access & dangerous structures
Economical on long life structure