.truncate { white-space: nowrap; text-overflow: ellipsis; }


Galvanic Corrosion on Rudders | Subsea Global Solutions

Technical Situation

Cruise Ship, length 290 meter, 113,323 Gross Tonnage
3 months out of dry dock, galvanic corrosion caused heavy cavitation/ erosion damage on PORT and STBD side rudders.
Section loss up to 100% was repaired by build-up welding with Class A underwater welding techniques. One of the rudders was filled with water.
Subsea Global Solutions together with cruise line and Class developed a repair plan involving the qualification of underwater wet welded groove weld procedures to AWS D3.6 Class A requirements.
Over a time period of three months Subsea Global Solutions crew sailed with the vessel, during port stops divers were deployed to restore the wasted material.
Repair was considered permanent  and was performed without interrupting the itinerary of the vessel

Uwe Aschemeier

Uwe Aschemeier is a German born and educated Welding Engineer who has evolved through the metals industry by studying mechanical engineering and welding engineering at various advanced education institutions in Germany. Mr. Aschemeier worked for the German Welding Society at its Institute in Munich for several years prior to moving to the United States of America. He has continued his expertise development by working for the Chicago Manufacturing Center, a non-profit consulting organization as well as Charcas Engineering/Domson Engineering in Toronto, Canada. In 2000, he joined H.C. Nutting Company in Cincinnati, where he worked as a senior welding engineer, commercial diver, and consultant. After consulting for Miami Diver for several years in welding related topics, he join Miami Diver LLC. (now Subsea Global Solutions) as their senior welding engineer and commercial diver in 2007. Over the next 10 years Mr. Aschemeier led the development of wet welding procedures to the level of A class through a JIP (joint industrial project) with DNV/GL and the GL testing lab in Hamburg to achieve for the first time A class groove weld procedures. This was done by showing on a consistent basis wet welding that meets A class standards, enabling true structure repairs that can be done on vessels with wet welding procedures. Mr. Aschemeier serves on the ISO/TC 44/SC 15 - Underwater welding committee representing the USA in this EU wet welding standard. He is the vice chair on D3.6M underwater welding standard, and also sits on 3 welding committees for AWS Standards and task groups as chair or vice chair. He has authored and co-authored numerous welding and NDE related articles published in the “Welding Journal”, “Inspection Trends” and other national and international trade magazines. He also serves in the “Fachausschuss Unterwassertechnik” (Technical committee underwater technology) from the German Welding Society (DVS). For six years, he served on the AWS Board of Directors.