McElligotts was engaged to restore some existing mining equipment in October 2014. This included a Hitachi EX5500 Excavator boom and an armoured face conveyor (AFC). Some of this equipment had seen use at the Gregory Crinum coal mine and it was clear it would need extensive surface preparation and specialised protective coating.
Prior to applying protective coating, abrasive blasting was conducted on both the boom and conveyor equipment up to AS1627.9 Class 2.5 (equivalent to ISO8501-1, Sa 2.5: Very thorough blast cleaning). From there, applied Intergard 251 as a primer and Interfine 629 for the final coatings on the boom, and Red Oxide primer on the AFC equipment. By choosing McElligotts, our client received off-site professional paint application, transportation of heavy equipment (the boom was 40-tonne alone) and quick turnaround.
Double Line Rail Bridge
In 2016, Queensland Rail sought a solution from the McElligotts team to undertake the refurbishment of the Merivale rail bridge in Brisbane. The Merivale bridge was opened in 1978 and had not received any major remedial maintenance since then. Our primary role in this project was to strip, clean and apply protective coating to the bridge deck, cables, arches and other structural surfaces.
As the Merivale bridge serves as the only rail link between South and North Brisbane, it was essential that no services were disrupted. This project also included replacement of all rail sleepers and installation of a gantry, which meant we had to closely collaborate with other contractors on site to ensure everything went smoothly with no interruption to services. As a result, this project spanned two years, finishing in July 2017.
The full schedule of works included:
- Application of a biodegradable degreasing solution to remove any grease, oil and other contaminants accrued over the years
- Pressure washed the surface with 5000 psi to remove all salt deposits and degreaser residue
- Cleaning of all corroded surface areas, removing any mill scale and flaking paint
- Mechanical abrasion of the remaining surface to remove loosely adhering coating, oxidation and all remaining contaminants
- Application of a spot coat of zinc, a spot coast of epoxy mastic and two coats of Ferrox A finish
The bridge had extensive contaminant residue and corrosion, requiring plenty of attention before the surface was adequately clean to begin protective coating application. There was also the added hurdle of tight access space and short timeframes between rail services. We were very pleased with the end result and managed to complete the project safely and sustainably, in alignment with our McElligott’s values.