MOL & Partners Successfully Test Laser-Based Rust Removal On Ship Hull

Field Trial Scenes on an Actual Vessel — Image Credits: MOL

Mitsui O.S.K. Lines (MOL), along with MOL Drybulk, Furukawa Electric, and TSUNEISHI Shipbuilding, successfully tested the “InfraLaser” rust and coating removal system on the outer hull of a vessel in December 2024.

This trial will reduce environmental impact, improve working conditions, and advance ship maintenance and repair automation.

Furukawa Electric, in collaboration with MOL and MOL Drybulk, has been working since 2021 on a laser-based system for rust and coating removal during ship maintenance.

Based on industrial laser applications, the technology aims to replace traditional sandblasting. Since 2022, Furukawa Electric and TSUNEISHI Shipbuilding have conducted demonstration tests to refine the system for ship repair applications.

Ship maintenance requires the removal of rust and coatings for inspections and repainting. The conventional sandblasting process uses abrasive materials, leading to the spread of debris, including paint and waste particles.

This method necessitates additional cleanup efforts. On the other hand, the laser-blasting method produces minimal dust, noise and waste, thereby reducing environmental pollution and improving occupational safety.

MOL, MOL Drybulk, and TSUNEISHI Shipbuilding have actively supported the development of this technology after recognising these benefits.

Furukawa Electric, using its expertise in metal processing, including cutting, welding, and surface treatments, has focused on optimising laser irradiation conditions for efficient rust and paint removal.

TSUNEISHI Shipbuilding contributed insights from shipbuilding and repair, while MOL and MOL Drybulk provided feedback from an operational perspective. These inputs will help in the final design and specifications of the “InfraLaser” system for real-world applications.

The trial, conducted on an MOL-operated vessel with outer hull paint supplied by Kansai Paint Marine, confirmed the effectiveness of the laser-based removal process.

The four companies now plan to expedite the system’s development as an alternative to sandblasting, aiming for automation and labour-saving advancements.

One key benefit of laser technology is its zero reaction force, which eliminates recoil and allows for smoother operation.

Reference: MOL

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