In 2003 Queensland Rail allocated AU$ 500,000 to blast and repaint as many of the bridges in the region as possible with 2 coats of ZINGA to a DFT of between 120 and 150 µm. The expectation (based on historic
costs of existing systems) was that they would manage to paint 6 or 7 bridges. The project team completed 11 bridges within the allocated budget, due in a large part to the project efficiencies gained using ZINGA.
In October 2012, an inspection revealed staining from the tannins from the transoms as well as some rust staining from un-treated steel above the deck, however a quick wash removed the stains revealing ZINGA in
perfect condition. Several DFT readings were taken on 3 bridges revealing a consistent average of 126 µm
An inspection was carried out by Queensland Rail approximately 10 years after the application of ZINGA. It was agreed to control 5 bridges (out of 11) which would be representative since all the bridges treated are in the same region and in the same environment.
Report: Inspection of the Paint Coating – Standard Gauge Bridges Contract of 2003
On 31st October 2013, the coating on five bridges was inspected by Glenn Duggan and Andrew Weatherburn from ZINGA, and Juanita Taylor (Design Engineer) and Laurie Kathage (Civil Engineer) from Queensland Rail. This inspection was to determine the condition of the ZINGA after 10 years,
with no touch-up work having been performed during that time. The inspection was performed using visual methods and by sampling DFT readings taken through the full depth of the girders at random cross-sections. The ZINGA was examined for cracking, crazing, peeling, oxidization, as well
as for signs of rusting of the substrate, including the return of rust in previously badly rusted areas (pits, crevices).
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