CASE STUDY
Momentum Engineering called in Alocit Systems when problems arose with the original coating on a Turkish Petroleum offshore gas platform in the Sea of Marmara, Turkey. Momentum, specialists in offshore oil and gas rig design and installation, needed a tough, environmentally friendly coating that could be applied in the splash zone on areas of the superstructure that were not adequately covered by the polyurethane top coat.
The superstructure had been brought overland in sections and coated before installation in approximately 43 metres of water. When the main platform was submerged the mud-mat over which it was situated proved to be significantly deeper than expected. The additional
1.5 metre depth of the mud-mat meant that a section of the leg structure, from 0.75 metres below the surface to 0.5 metres above, had to be coated to match the yellow top coat as it had been painted
black because it was
expected to be under water.
Alocit 28.15 was chosen because of its outstanding performance in wet and moist conditions, its longterm record around the world in environmentally sensitive areas and for its ease of use.
First, all the affected legs and struts were cleaned by divers using grit-blasting to remove marine growth and provide a surface profile for the Alocit System.
Following the cleaning operation, a two-coat index system of Alocit 28.15 was applied. The first was black in order both to define the area being coated and to provide an early warning of damage to the final tinted top coat.
The second coat was tinted to match the customer’s specifications and applied the same day, providing a cosmetic and hard wearing solution without any disruption to the normal operation of the facility.
With regular maintenance checks for abrasion or impact damage, the coating has a life-expectancy of ten to fifteen years.
Alocit 28.15 was chosen because of its outstanding performance in wet and moist conditions, its longterm record around the world in environmentally sensitive areas and for its ease of use.
First, all the affected legs and struts were cleaned by divers using grit-blasting to remove marine growth and provide a surface profile for the Alocit System.
Following the cleaning operation, a two-coat index system of Alocit 28.15 was applied. The first was black in order both to define the area being coated and to provide an early warning of damage to the final tinted top coat.
The second coat was tinted to match the customer’s specifications and applied the same day, providing a cosmetic and hard wearing solution without any disruption to the normal operation of the facility.
With regular maintenance checks for abrasion or impact damage, the coating has a life-expectancy of ten to fifteen years.
TECHNICAL DETAILS
Conditions:
Underwater, Salty, Marine Growth
Products:
Alocit 28.15, yellow
Alocit 28.15, black
Alocit 28.15, black
Type of Project
Substrate Condition
Existing Coating
Surface Preparation
Application Method
Material Used
Coverage Rate & DFT
Type of Project
Splash zone coating
Substrate Condition
Partly corroded, flaking & damp
Existing Coating
PU top coat, epoxy base coat
Surface Preparation
Grit blasting
Application Method
Hand brush
Material Used
Alocit 28.15 yellow & black
index system
Coverage Rate & DFT
Coverage Rate: Average 0.66 M2 / Kg @ 600 microns
DFT 28.15 Yellow: 300-400 microns
DFT 28.15 Grey: 300-400 microns
Total average DFT: 600 microns
DFT 28.15 Yellow: 300-400 microns
DFT 28.15 Grey: 300-400 microns
Total average DFT: 600 microns