Complete refurbishment of process vessel currently out of service facing fatal corrosion problems. Previous hard rubber coating failed with lot of undercorroded areas.
After taking down current hard ruber and 3 badly corroded parts rewelded, internal of the vessel protected against Sulphuric Acid 15% concentration attack at 60°C temperature, pressure 5 bars, using CORROCOAT materials: primer PPA, Polyglass Pipe Grade for 296 vertical hole of nozzle plate (hot spot of job), Corrofill, Polyglass VEF, Polyglass Veil Coat. Postcured. External protected by Plasmet ZF.
The success of this project has led to the customer specifying Corrocoat systems to protect other areas of petrochemical plant including high aggressive chemical and temperature attack areas.
Previous hard rubber coating
Spray application of Polyglass VEF
Process vessel after refurbishment
Corrosion protection of chemical storage tanks where previous linings had failed.
Corroglass AR4 system
Grit blast to ISO SA 2 1/2. Application of first coat of AR4 was applied, followed by a 2nd build coat to the required DFT. Coating was then spark tested and a third build coat applied. Second spark testing is followed by application of the veilcoat and post curing. Airless spray and hand application. Spark test 7130, veilcoat application and post cure.
As the portafeeds are constantly on the move, they are subject to mechanical damage, which makes difficult to estimate the life expectancy of the coating. However, the customer remains more than satisfied with the significant increases achieved, and Corrocoat has now lined more than 300 units using this process.
Portafeeds queuing for blasting
Portafeed encased in rubber for protection
Portafeed lined with AR4
The cooler waterbox covers would be considered beyond repair for most companies, without the established refurbishment expertise of Corrocoat. Cracking of the cover was stabilised by performing external metal stitch repairs. The internals were then re-profiled, followed by blasting and coating using a high build vinyl ester coating.
Corroglass 600 series
Remove existing coating. Pre machine rebates. Grit blast internals to ISO 8501-1, SA 21/2. Carry out metal stitch repair. Coat using Corroglass 600 to a minimum dft of 1.5mm. Post machine. Grit blast externals to ISO 8501-1, SA21/2. Apply Plasmet ZF followed by a proprietary topcoat.
We have a proven track record within the power industry and also within the sea water environment. The customer needed a quick turn round to minimise downtime, and Corrocoat was able to meet these requirements, alongside a projected design life of 18-20 years. Corroglass is specially manufactured for its resistance to cavitation, erosion and impact whilst in operation under adverse conditions. Corroglass 600 series and the Plasmet range are both used in diverse applications throughout industry.
Damage cut out