Ship Propeller Repair: A Case Study

3rd December 2024

A Kamewa propeller cone required urgent repair after suffering extensive erosion and impingement damage caused by prolonged exposure to harsh marine conditions. The degradation affected the propeller’s performance, jeopardising the vessel’s efficiency and reliability. Without immediate action, the damage could lead to costly downtime and potential replacement.

The repair solution needed to restore the propeller cone’s structural integrity, ensuring long term protection against further erosion and enabling reliable vessel operations.

Resimac’s Ship Propeller Repair Solution

Surface prepared through abrasive grit blasting to remove contaminants and ensure proper adhesion.
Badly pitted areas filled and repaired with a high performance coating applied using a plastic applicator.
Internal surfaces coated with two brush applied layers of 507 DWPU, creating a durable, erosion resistant barrier.

Application Details

The repair began with abrasive grit blasting the substrate to SA2.5, achieving a 75-micron profile as specified by ISO 8501/4 standards. This process removed surface contaminants, corrosion, and old coatings, ensuring a clean and prepared surface for optimal coating adhesion. Badly pitted areas were stripe coated with Resimac 507 DWPU, applied using a plastic applicator to fill imperfections and restore structural integrity.

After curing, two layers of Resimac 507 DWPU were brush applied to the internal surface, each at a nominal thickness of 500 microns. This provided uniform coverage and ensured enhanced protection against erosion, impingement, and the effects of prolonged exposure to harsh marine conditions. The combination of thorough surface preparation and precise application techniques created a robust, long lasting barrier that restored the propeller cone’s performance and durability.

Products Used

507 DWPU

Results and Benefits

The application of Resimac 507 DWPU successfully restored the Kamewa propeller cone, providing a durable barrier against erosion and impingement. The repair extended the lifespan of the propeller, reducing the need for frequent maintenance and costly replacements. The vessel’s operational reliability was significantly improved, minimising downtime and ensuring efficient performance. This highlights the critical role of high performance protective coatings in maintaining marine equipment and reducing operational costs over time.