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Austria News

Long-term study Danube ferry Ottensheim – Status after 15,000 hours

Fig. 1: Test sheet, lower edge on the underwater side, upper edge on the water flow side
Fig. 1: Test sheet, lower edge on the underwater side, upper edge on the water flow side  
Fig. 2: Back side, upper edge on the underwater side, lower edge on the water flow side
Fig. 2: Back side, upper edge on the underwater side, lower edge on the water flow side  
Fig. 3: Edge under water, corrosion 3 x times of size 10, 17 and 12 mm
Fig. 3: Edge under water, corrosion 3 x times of size 10, 17 and 12 mm  
Fig. 4:
Fig. 4:  
Fig. 4+5: Edge on the water flow side, selective wear to 85 mm and approx. 40 mm
Fig. 4+5: Edge on the water flow side, selective wear to 85 mm and approx. 40 mm  

ENVIRAL® Austria

The long-term test being conducted since September 2012 on the Danube ferry of Ottensheim provides new test results about which we would like to inform you in the following.

 

The powder-coated test sheet installed on the hull of the ferry was currently subjected to a test in January 2015. At this point in time it had been exposed to water for 15,000 hours. After cleaning, the damage to the powder coating that was identifiable on one of the longitudinal edges of the test sheet (cf. Fig. 3) was caused by flotsam – e.g. pieces of wood, ice sheets, sludge etc. This damage had already been noticed at the time of the previous inspection in August 2014; however, it has not changed significantly since then. The abrasion of the powder coating on the other edge of the test sheet (cf. Fig. 4+5) is probably attributable to the flood water of the Danube: the slick carried along with it acted like a fine jet of sand on the coated surface. This damage was also recorded during the inspection in August 2014 and it has remained primarily unchanged since then.

 

Based on the current inspection, it can be concluded that the damage, in fact, needs to be considered critically. However, what needs to be highlighted is that this damage has remained relatively constant since the time of the inspection done in August 2014. In other words, starting from these defective areas, there is no dis-bonding whatsoever of the powder coating noticeable on the surface. This can be evaluated as an outstanding result.

 

The test shall be continued for another 2,000 hours as soon as the ferry resumes operation after completion of maintenance work being done on it at present.

 


Category: ENVIRAL Austria
21.02.2015




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