This 5,5 meter propeller shaft is 1 of 2 coming from an already docked ship. Both shafts suffer from wear because of seals running in. Of course wear at this location can ultimately cause leakages. Griekspoor has repaired these shafts, incl. pre-machining of the damaged area, within 2 to 3 days.
The coating that is chosen is TOPCOAT107 because of its high wear resistance in combination with toughness and excellent corrosion resistance. The surface characteristics is about similar to new grinded base material which means lubrication of seals is optimised to avoid future wear problems.
Griekspoor Thermal Coatings has recently developed TOPCOAT® 107: a nickel based super alloy blended with carbides. TOPCOAT 107 is developed as an improved and very economical hard chrome and nickel/chromium replacement.
TOPCOAT 107 combines the hardness of the carbides with the flexibility, tenaciousness, and toughness of the super alloy. This combination results in excellent corrosion resistance together with outstanding wear resistance against fretting, abrasion, and cavitation.
See photos of some different repair steps
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