Underwater Anode Welding Thailand: Rudder Anode Installation at Kerry Siam Seaport
- MaxiDive
- May 12
- 4 min read
MaxiDive successfully completed an underwater anode welding Thailand project on a commercial vessel at Kerry Siam Seaport, Thailand. The operation involved welding and securing sacrificial anodes to the vessel’s rudder area while the vessel remained afloat.
The project supported cathodic protection maintenance, vessel corrosion control, and underwater hull integrity without requiring dry docking. The work was performed by MaxiDive’s commercial diving team using SSDE equipment, underwater welding systems, and photo/video documentation.
Underwater Anode Welding Thailand for Vessel Corrosion Protection
Sacrificial anodes play an important role in protecting underwater metal structures from corrosion. When installed correctly, they help reduce corrosion risk on key vessel areas such as rudders, hull structures, stern areas, and other submerged components.
For this underwater anode welding Thailand project, the dive team received 18 zinc plate anodes from the vessel crew. Sixteen anodes were successfully welded and secured to the rudder area, with eight anodes installed on the starboard side and eight on the port side.
Two remaining anodes could not be installed in the requested position due to access limitations created by the rudder position above the waterline. These anodes were returned to the crew.
Project Scope – Underwater Anode Welding Thailand
The scope of this underwater anode welding Thailand operation included:
Mobilization of commercial diving team
Preparation of SSDE and underwater welding equipment
Receipt and inspection of zinc plate anodes
Underwater positioning at the rudder area
Welding and securing of sacrificial anodes
Port and starboard rudder anode installation
Photo and video documentation
Final confirmation of installed anodes
Return of unused anodes to the vessel crew
The project was completed under calm sea conditions with approximately 5 meters of underwater visibility.
Sacrificial Anode Installation on Rudder Assemblies
The rudder assembly was the main work area for this project. Sacrificial anodes were installed to support cathodic protection and reduce corrosion exposure on submerged metal surfaces.
The welding summary recorded:
18 zinc plate anodes received from the crew
16 anodes successfully welded and secured to the rudder
8 anodes installed on the starboard side
8 anodes installed on the port side
2 anodes returned due to inaccessible installation position
The anodes used for this project were zinc plate type, with reported dimensions of approximately 400 mm × 120 mm × 50 mm and a weight of approximately 15.5 kg per unit.
Why Underwater Anode Welding Is Important
Underwater anode welding allows vessel operators to maintain corrosion protection systems without waiting for dry dock availability. This is especially valuable for vessels operating on tight schedules or requiring urgent maintenance during port calls.
Professional underwater anode welding Thailand services help vessel operators:
Reduce corrosion risk
Maintain cathodic protection performance
Extend the service life of underwater structures
Avoid unnecessary dry dock downtime
Support maintenance planning
Improve protection of rudders and submerged metal areas
Document completed work for technical records
For commercial vessels operating in Thailand, underwater anode installation provides a practical and cost-effective maintenance solution.
Underwater Welding Execution and Safety Control
Underwater anode welding requires trained commercial divers, suitable welding systems, controlled procedures, and strong surface coordination. The work must be performed carefully to ensure each anode is correctly positioned, welded, and secured.
During this project, MaxiDive used:
SSDE diving equipment
Underwater welding system
Photo and video documentation system
Surface supervision
Controlled diver communication
Vessel-side coordination with the crew
This ensured that the installed anodes were properly secured and that the completed work could be documented for the vessel’s technical team.
Operational Limitation and Technical Note
During the operation, two anodes could not be welded in the originally requested position because the rudder was positioned above the waterline in that area. The report noted that, to perform welding in that location, the stern draft would need to be at least 10 meters.
This technical note is important because it demonstrates that underwater repair and anode installation depend on vessel draft, component position, access conditions, and safe diver reach.
Rather than forcing installation in an unsuitable position, MaxiDive completed the accessible scope safely and returned the remaining two anodes to the crew.
Benefits of Underwater Anode Welding Thailand
This underwater anode welding Thailand project helped the vessel maintain corrosion protection without dry docking. The vessel remained afloat, while the diving team completed the required rudder anode installation during the port operation.
Key benefits included:
No dry dock requirement
Reduced downtime
Port-based maintenance execution
Improved rudder corrosion protection
Completed installation of 16 sacrificial anodes
Underwater welding documentation
Practical support for vessel maintenance planning
For shipowners and managers, this type of service helps maintain vessel integrity while reducing operational disruption.
MaxiDive Underwater Welding and Anode Services
MaxiDive provides commercial diving, underwater welding, sacrificial anode replacement, ICCP support, underwater inspection, hull cleaning, propeller polishing, and class-approved underwater repair services across Thailand. MaxiDive’s service pages list underwater welding and class-approved repair capabilities as part of its commercial diving offering.
Our teams support vessel operators at major Thai ports and anchorages with practical underwater maintenance solutions designed to reduce downtime and support vessel reliability.
Conclusion
This underwater anode welding Thailand project at Kerry Siam Seaport demonstrates MaxiDive’s ability to complete technical underwater maintenance while the vessel remains afloat.
The dive team successfully welded and secured 16 sacrificial anodes to the rudder area, supporting cathodic protection and corrosion control. The remaining two anodes were returned to the crew due to access limitations related to the rudder position and vessel draft.
By completing the project safely and efficiently, MaxiDive helped support vessel protection, reduce dry dock dependency, and provide documented underwater maintenance for the vessel’s technical team.
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