Continuing Zinga’s expertise in cold galvanizing, we would like to introduce the use of Zinga 96% Zinc Cathodic Protection on 16 sub culvert flood protection pipes near Wrexham.
What Is A Sub Culvert?
A culvert is a structure that allows water to flow under a road, rail road, trail, or similar obstruction from one side to the other. Within the UK, culverts are embedded and surrounded by soil. Culverts help drain areas at high risk of flooding underneath road and rail lines. They are usually pipes, or reinforced concrete.
A culvert may also form a bridge-like structure designed to allow vehicle or pedestrian traffic to cross over the waterway while allowing adequate passage for the water.
How Culverts Can Fail
Culvert failures can occur for a wide variety of reasons. They can fail due to lack of maintenance, or environmental and installation-related failures. They can also have structural or material failures. Henceforth, culverts can fail due to collapse or corrosion of the materials from which they are made.
If the failure is sudden and catastrophic, it can result in injury or loss of life. Therefore, culverts require sufficient long term protection.
Case Study: Flood Relief Sub Culverts at Bangor-On-Dee
In January 2008, protection was required on a series of 16 sub culverts near Wrexham.
Due to the location of the sub culverts in farmland, heavily nitrated water was lying with the corrugations of the galvanized culverts. Henceforth, the metalwork was oxidizing the hot-dip zinc at an accelerated rate.
Consequently, some areas of the culverts were heavily pitted and were in danger of perforation. This could be catastrophic due to the road located over the site.
It was vital a long term solution was specified and applied quickly without disturbance.
Solution: Zinga 96% Zinc Cold Galvanizing Application
To prepare for the application of the Zinga 96% the metalwork was hydro-blasted to remove all mud and salts. After this, the inside of the pipework was blast cleaned to SA2.5. Any damage was consequently repaired to standard.
Zinga 96% was then spray applied to 140μm DFT. The work was carried out on all sixteen culverts by Colorado Corrosion from Colwyn Bay, N. Wales. Colorado Corrosion are specialists in culvert refurbishment and confined space work in civil engineering environments.
Introducing Zinga Cold Galvanizing
Zinga is a unique system suitable as an alternative to hot-dip galvanisation or metallisation.
Zinga Film Galvanising System is a single pack coating that contains 96% zinc. Henceforth, it provides cathodic protection of ferrous metals. You can use Zinga as an alternative to hot-dip metallisation, as a primer in a duplex system (active and passive) or as a recharging system for hot-dip galvanisation, metallisation or zinganised surfaces. You can apply Zinga on site, avoiding the need for dismantling ferrous metal structures. It forms a grey matt, non toxic finish. Zinga conforms to ISO standard 3549 in regard to its zinc purity of 99.995%. It also qualifies to ATM standard A780 in regard to its use as a repair coating for hot-dip galvanisation. This product is then overcoatable with a compatible paint.
Zinga 96% Best Uses
Zinga is ideal for the protection of ferrous metal structures such as bridges, a primer for boat keels, pylons, masts, street furniture, etc.
- London Underground Approved
- Certified for use with potable water (BS 6290 2000)
- Certified as non-flammable (BS476 parts 6 & 7 : fire propagation and surface spread of flame)
- NORSOK standard M-501 Revision 5 approved
- Approved for use in void spaces. This includes all internal structures except for oil tanks and ballast tanks by Lloyd’s Register.
Do you require further information regarding Zinga cold galvanizing systems? Subsequently, do you have flooding culverts that require protection? Contact our technical team on 01462 421333 to find out how Promain can help.