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Table 1: Advantages (+) and disadvantages () of the two different coating systems

Soft polymer coating Softurb 80 Hard thermal spray coating Diaturb 532
+ low investment for equipment high investment for equipment
+ low material costs high material costs
+ good cavitation resistance modest cavitation resistance
+ good repairability (even in-situ) difficult to repair
high manual skills required high robot programming effort
modest layer tolerances + tight layer tolerances
modest material strength + high material strength
modest bond strength + high bond strength
sensitive against large stones sensitive against deformation