One of the most important raw material for the energy production is oil. This crude oil must be transported from their origin to the process and consumer over great distances, which includes at most times crossing of the sea, which for Europe is done 90 % by oil tankers. How we have learned in the last decades this transportation became hazardous for the environment. Some of the old oil tankers, mainly single hull tankers, have had accidents with an enormous mass of oil spillage into the sea and fatal consequences for the marine-ecological system and harmed the Flora and especially the Fauna for many years. In specific I will remember on the accidents of Erika (December 1999) and Prestige (November 2002) with tremendous pollution of the environment. Although some of the accidents were caused by human errors, a further reason was the degradation of the structural integrity by corrosion attack. Because the conventional controls of these tankers were expensive and time consuming and time span between these controls of the tankers were based only on the time between the controls and do not refer to the condition of the tankers. Based on these facts a consortium, consisting from TÜV Austria (A), Vallen Systeme (G), Technical University of Gdansk, Polish Registration Society, Institute for Applied Research and Maritime Institute of Gdansk (all Poland) were created and started in 2002 an EC founded R&D project for 'Detection and discrimination of corrosion attack on ships (crude oil tankers) with Acoustic Emission (AE)'. The intention of this project was to develop a discontinuous permanent installed and spot testing system. The aim of both systems was to detect the corrosion attack on oil tankers in-time and give the ships owners as well the port authority a fast and reliable testing system to validate the status of the checked tanker. Within this paper the first investigations (corrosion tests within the lab) on ship building materials and background measurements on ship within the harbour and the open sea will be demonstrated. The classification of the Acoustic Emission, based on a frequency domain pattern recognition, shall be demonstrated. Based on the recent information the testing and grading of the structure will be possible within few hours on the tankers quasi in-service, which will increase the acceptance of the method by the ship owner. A short out-lock in the further investigation within this project shall conclude the paper.
Corrosion testing of ship building materials with acoustic emission (AE)
Korrosionsprüfung an Schiffbaumaterial mittels Schallemission (AE)
2004
9 Seiten, 9 Bilder, 1 Tabelle, 7 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
Online Contents | 1998
Detecting the Extent of Corrosion with Acoustic Emission
Transportation Research Record | 2000
|Detecting the Extent of Corrosion with Acoustic Emission
Online Contents | 2000
|Testing of Acoustic Emission Technology to Detect Cracks and Corrosion in the Marine Environment
Online Contents | 2010
|NTRS | 1977