Protective Coatings an extended period of continuous service, the units were pressure-washed, inspected, and pressure-tested. Marine growth was limited, and the remaining deposits were easily removed. Mechanical damage was minor and mainly attributable to routine handling. Neither ICAF systems nor erosion had caused significant coating degradation. After local repairs, the box coolers were returned to service, reducing the overall maintenance schedule from the initially planned 21 days to approximately 8 days.
Industry recognition and sustainability considerations By 2024, the maintenance of existing heat exchanger systems through cleaning and re-coating had been gaining increased attention as part of broader sustainability strategies in shipping. At SMM, the world’ s leading maritime trade fair, SÄKAPHEN presented its box cooler coating concept together with its partners, Multi Solutions and Nordic Green Products( Norway). The exhibition confirmed growing interest in extending the typical 15-year design life of box coolers through systematic refurbishment rather than replacement. In this context, a hydrophobic, biocide-free lining system such as SÄKATONIT Extra AR-F was of particular interest, as it addresses both environmental regulations and operational performance. Equally important was the availability
of regional service support, allowing inspections and re-coating to be performed at shipyards close to each vessel’ s operating area.
OEM validation and a new production standard An additional milestone in the technical qualification of SÄKATONIT Extra AR-F was reached in 2025 with its evaluation and subsequent approval by VDL Klima( Netherlands), a manufacturer of heat exchangers for maritime and industrial applications. Up to that point, SÄKATONIT Extra AR-F had primarily been used as a maintenance and refurbishment coating. However, this OEM evaluation was driven by requirements for reduced VOC emissions, lower solvent content, and the avoidance of energy-intensive thermal curing in production. Following extended testing, the coating was thus approved for use in the manufacturing of new box coolers.
The journey continues From its initial use as a refurbishment lining to its adoption in original equipment manufacturing, Säkaphen’ s SÄKATONIT Extra AR-F continues to be adapted to changing technical and regulatory requirements. With growing demands for sustainability, durability, and efficient shipyard processes, further operational data from different vessel types and service conditions will continue to shape its future development.