Where Can Zinga Be Used?
Zinga is used on a wide variety of applications which can be divided into the following:
Stand-alone galvanising system
Zinga provides comparable protection to conventional galvanising without the need for topcoats.
Although Zinga is only available in grey (the natural colour of zinc) the significant advantage of this form of application is that the Zinga layer can be re-coated at any point in the future with the bare minimum of preparation and without compromising the integrity of the coating (see Re-charging of Zinga).
Zinga on its own is often used when specifiers are unable to galvanise because a structure is already in situ or it is too big for the molten zinc baths HDG.
Additionally Zinga is commonly specified on delicate structures (wrought iron gates, sculptures) or when architectural demands require a higher standard of surface finish (no need to drill to de-gas, fettle).
AS A PRIMER IN DUPLEX SYSTEM
Not everybody likes the colour grey and with the additional protection of a compatible topcoat, the coating durability offered significantly increases. ZINGA does not even have to start working actively until the topcoat has been compromised and with no underlying corrosion creep or rust bubbling, the topcoat itself inevitably lasts longer.
In a duplex system (Active + Passive), ZINGA should be applied in 1 layer of min. 60 to 80 µm DFT.
For more information and application instructions, see ‘Overcoating ZINGA’.
AS SHOP PRIMER
At 30-40 µm DFT, ZINGA can be used as a shop primer. The big benefit is found in the fact that the steel structures do not require reblasting before coating if ZINGA is applied as a shop primer. The steel structure can be overcoated with ZINGA to obtain a cathodic protection or with any other paint without the need for reblasting!
Zinganised steel structures can be welded and bent during assembly.
REPAIR FOR WORN AND DAMAGED HOT-DIP GALVANIZED OR METAL SPRAYED STRUCTURES
This method is probably the most common use of ZINGA as it requires the simplest surface preparation. ZINGA’s mechanism of protection is so similar to conventional galvanizing that they work in complete unison, as they are merely different forms of zinc. Rather than replacing galvanized assets, structures can simply have their protection “re-charged” by applying ZINGA to the rough surface of the old galvanizing after appropriate decontamination of the surface and removal of the salts.
As protection to concrete reinforcement bars(rebars)
Widely used in countries where the available aggregate for concrete can be saline, Zinganising the steel re-bars before assembly and immersion in concrete ensures vastly increased protection from corrosion without reducing the pull-out strength of the bars. Recent tests in three independent laboratories showed that Zinga had at least twice the corrosion protection of epoxy coated rebars.
Repair for worn or damaged hot-dip galvanising or hot metal spray
This is probably the most common use of Zinga as it requires the simplest surface preparation. Zinga’s mechanism of protection is so similar to conventional galvanising that they are fully compatible, as they are merely different forms of zinc. Rather than replace galvanised assets, structures can simply have their protection “re-charged” or “topped up” by applying Zinga to the rough surface of the old galvanising after appropriate decontamination.
As a primer with suitable topcoats
Not everybody likes the colour grey and with the additional protection of a compatible topcoat the coating durability offered is significantly increased. Zinga does not even have to start actively working until the topcoat has been compromised and with no underlying corrosion creep or rust bubbles, the topcoat itself inevitably lasts longer (see Duplex Systems for more detail).