Airport of Düsseldorf

ZINGA was applied on steel structures of the Airport of Düsseldorf in 1990, namely on a hangar, with a height of more than 30 m, that serves as testing area for the engines of large commercial airplanes and of which the interior side has been insulated with panels. There is a metal structure between the insulation panels and the concrete building. The entire metal structure  has been protected with ZINGA  as unique system. The applied ZINGA layer thickness was 120 µm. The company Dillinger Stahlbau executed the job.

After 4 years the first inspection took place. There was no formation of rust and the loss of layer thickness was measured to be no more than 5 µm. The new hot-dip galvanisation on the contrary already showed traces of oxidation and rust. The letter from Ir. Helmut Schwarz to Zingametall, dated 27/10/1999, stating that 10 years after the application, there has been no quality complaint at all. The decrease of the ZINGA layer thickness is very slow, thanks to the zinc salts on the surface that forms an extra barrier protection or patina.

The following additional information concerning the application of ZINGA in the airport of Düsseldorf was transmitted to us by Mr. Schwarz on 17/10/00: the protection of the welding seams was carried out very soon after the welding seams had cooled down to temperatures below 40 to 35 °C and after they had been properly cleaned. Since welding seams usually do not have a rough surface, the coating began with a thin layer. Afterwards, the coating was built up to the required thickness of approx. 150 µm which complied with the layer thickness of the steel construction as specified by the customer. No further passive coatings such as paints were applied at that time. The application was carried out inside the workshops. The welding seams were checked by ultra-sound equipment by an officially recognised institution before the final assembly on site.

Some time before checking the structure’s condition in presence of the airport authority in May 2008: the steel structures on the outside of the building and on the roof have been over coated after the 10-years guarantee-period, despite the fact that there were no complaints or traces of corrosion. This was done for aesthetic reasons and given the aggressive environmental

circumstances on the outside of the building.

The topcoat consisted partly of a blue colour paint and partly of a MIO based paint.

Guangzhou Baiyun International Airport

Guangzhou Baiyun International Airport is the main airport of Guangzhou, the capital of Guangdong province, China. In 2011, Guangzhou Baiyun International Airport was China’s 2nd busiest and world’s 19th busiest airport in terms of passenger traffic, with 45,040,340 people handled. As for cargo traffic, the airport was the 3rd busiest in China and the 21st busiest worldwide. Guangzhou airport is also the 2nd busiest airport in terms of traffic movements in China.

In February 2002 ZINGA was applied on the passengers’ terminals of the Guangzhou New Baiyun Airport. The construction of the passengers’ terminals consists of hollow metal elements, that have been previously hot-dip galvanised. For better acoustics, the metal was perforated. Afterwards, the surface with the little holes had to be repaired again with ZINGA. The surface was sprayed with ZINGA in an angle of 45° from both sides.

In October 2003, ZINGA was used on roll-formed panels in the first phase of construction.

In August 2008, the airport’s new expansion plan was approved by the National Development and Reform Commission of China. In december 2008, Therminal 1 was expanded and again ZINGA was used.

The airport will build a third runway located 400 metres east of the existing east runway. Construction of the third runway is estimated to start in 2013 and finish in 2015-2016.

Mumbai Domestic Airport

The domestic terminals in Mumbai with the same name as its international wing are located in Santa Cruz, East. There are two domestic terminals -Terminal 1A (with an area of 28960 sqm), and Terminal 1B (with an area of 45000 sqm).

Terminal 1B was constructed by Unity Infrastructures where the Structural Consultants were M/S Mahimtura & Co.

In 2006 all steel structures including the huge curbed spans of the new airport of Mumbai Domestic Airport are coated with ZINGA and finished with a white PU.
5 years after application the structures still look as if they were treated yesterday.

The testimonial was written by the responsable of Pratibha Pipes & Structral Pvt. Ltd., the steel constructor and coatings applicator, after application.