RUDDER PINTLE REBUILT WITH BELZONA 1111
Industry: Marine (MRNE)
Application: MPT-Mechanical Power Transmission (MPT)
Substrate: Steel
Customer Location: Portland, OR, USA
Application Date: November 2015
Products:
Belzona 1111 (Super Metal)
Problem: Shaft was corroded and pitted from salt water.
Photograph Descriptions
- Shaft already machined down, some damage still visible.
- Rough cut thread pattern.
- Applying Belzona 1111.
- Completed application, finishing with emery cloth.
Application Situation
Rudder pintle shaft on a 700' US Navy ship.
Application Method
All of the damaged areas were removed with a lathe. The surface was then prepared with the lathe to leave a super rough thread pattern to ensure a full mechanical bond. Again, using the lathe, Belzona 1111 was applied with a slow rotation. After a sufficient amount of material was applied, Belzona 1111 was allowed to fully cure and then machined to the required specifications. There was one low spot and a couple of air pockets visible, so those areas were once again abraded and a further layer of Belzona 1111 was applied and allowed to cure before the final machine cut was made. The final finish was made using emery cloth, leaving a perfect smooth finish.
Belzona Facts
Welding would risk warping the shaft and would have taken probably close to ten times the man-hours to complete. The actual time spent on this process was no more than 6 hours, not including cure time.
