Project summary

NGP was contracted to carry out full maintenance and recoating of eight box coolers from Siem Atlas at Prismar’s workshop in Brazil. The project included mechanical and chemical cleaning, sandblasting, two-coat application and curing.

How we worked

The coolers were first mechanically cleaned and then submerged in a hydrochloric acid solution (5–7%) to remove marine scaling. They were neutralised in saltwater, flushed, and high-pressure washed. After drying, each cooler was sandblasted with Garnet Mesh 30/60. Painting was done using Säkatonit Extra AR-F, applied in two coats with 72 hours of curing before final prep and delivery.

Results

All eight coolers were successfully cleaned, recoated and protected with a robust epoxy system designed to prevent galvanic corrosion and improve heat exchange performance. Final curing and surface prep were completed with guidance from NGP and site support from Prismar.

What we used

• Säkatonit Extra AR-F (2-coat system)
  
• Garnet Mesh 30/60
  
• Hydrochloric acid
  
• Thinners: Xylene & N-Butanol mix
  
• Custom-built curing and drainage setup
  

Reflections

This was a technically demanding project with high environmental and material standards. The coating system used will offer long-term protection, better thermal efficiency, and improved resistance to fouling – ensuring operational reliability for years ahead.