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Continued from page 30 Table 3: Overall results


was also performed which confirmed the presence of tin (Sn) particles. Upon inspection on the filters, it was revealed that there were a large amount of tin (Sn) particles on the filters and seen in Figure 1. A similar instance was also noticed in another vessel which can be seen Figure 2 with the help of particle count analysis.


Figure 1: Discharge filter with tin (Sn) particles - Ship 3


The above Table 3 shows different cases where different wear elements were detected and why it is useful to test particle count in sterntube samples.


As seen in above table Ship 3 had the least amount of wear observed but still has relatively high ISO 4406 in the 14 micron range, an additional SEM analysis


Figure 2: Bottom of the filter housing with tin (Sn) particles


Since the classification societies provide strict wear limits, it would be prudent to perform additional investigation analysis to identify the wear mode to decide


upon a further course of action if elevated wear is detected.


SeaTec is able to provide additional investigation analysis such as Scanning Electron Microscopy and ferrography for such sterntubes with high wear and provide technical assistance if required.


LINK pact-oilanalysis@seatec-services.com 32 LUBE MAGAZINE NO.141 OCTOBER 2017


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