CAVITATION DAMAGE TO THIS TANKER PROPELLER REPAIRED WITH BELZONA

KHIA ID: 338
Industry: Marine (MRNE)
Application: SOS-Ships and Offshore Structures (SOS)
Substrate: Bronze
Customer Location: Oil tanker in Argentina, South America
Application Date: April 1997
Products:

Belzona® 1321 (Ceramic S-Metal)

Belzona® 1311 (Ceramic R-Metal)


Problem: The large difference in pressure on the edges of this bronze propeller caused cavitation bubbles that in turn damaged the metal substrate after imploding onto the surface.
Photograph Descriptions
  1. Aft view of the tanker
  2. Surface preparation of the bronze propeller
  3. Close up view of grinding profile
  4. Finished application
Application Situation
Cavitation damage to a 12-foot diameter tanker propeller.
Application Method
The application was carried out in accordance with Belzona Know-How System Leaflet SOS-2.
Belzona Facts
Any polymeric coating that is subject to cavitation will be sacraficial, how-ever it is a lot more cost effective than welding and remachining. It is very time consuming to braze bronze and requires skill to rebuild significant metal loss.