Project partners:
Institute for Ship Structural Design and Analysis (Hamburg University of Technology), Muehlhan AG, Clean-Lasersysteme GmbH, Fraunhofer IFAM, Hermann GmbH Maschinenbautechnologie, Sherwin-Williams Deutschland GmbH

Project members:
Hamburg University of Technology: Gyde Andresen-Paulsen, Christian Woitzik, Moritz Braun, Franz von Bock und Polach

Funding party:
Federal Ministry for Economic Affairs and Climate Action (BMWK)

Duration:
07.2022 – 06.2025

Outline:
Within the scope of this project, various shipbuilding/offshore structural elements, which are exposed to particularly high local mechanical stresses, are investigated. Failures regarding coating and corrosion at welds are observed and analyzed. In a test program, various influences, such as coating material application, environmental conditions, surface preparation as well as mechanical stresses are considered. Through a detailed knowledge of failure processes and interrelationships of various aspects an optimization and significant reduction of surface preparation processes prior welding is aspired.

In addition, an environmentally friendly, mechanically flexible and welding-tolerant coating system is to be developed. On the basis of an industrially available laser technology, an alternative surface preparation technique for welds will also be established.

As part of the evaluation of the fatigue strength and cracking of the coating as well as the corrosion behavior, the Institute for Ship Structural Design and Analysis will conduct strength tests of uncoated, coated and post treated welded specimens.