KHIA headerKnow-How in Action

VOL XXX, NO 71

Belzona® Anti-Cavitation System Protects Naval Vessel

 
 

Industry:

Marine (MRNE)

 
 

Application:

Ships and Offshore Structures (SOS)

 
 

Customer Location:

US Navy Base, Japan

 
 

Application Date:

2012

 
 

Application Situation:

Naval vessel rudders.

 
 

Problem:

Due to the shape of the rudders, coupled with disturbed water flowing from the propeller, and the high manouevrability of the vessel, cavitation damage occurs leading to severe erosion corrosion pitting.

 
 

Products:

Belzona 1311 (Ceramic R-Metal)

Belzona 1341 (Supermetalglide)

Belzona 2141 (ACR-Fluid Elastomer)

 

Substrate:

Carbon Steel

 
 

Application Method:

The application was carried out in accordance with Belzona Know-How System Leaflets SOS-1 & SOS-2. Rebuilding of the pitted areas was carried out using Belzona 1311. Belzona 1341 was used as the first coat to provide optimum adhesion and corrosion resistance. The Belzona 2141 system was applied as the top coating to provide cavitation resistance.

 
 

Belzona Facts:

The Belzona 2141 system has been designed to resist the effects of cavitation and impact, as well as providing excellent corrosion protection. The Belzona application was inspected after 2 years and was mostly found to be in perfect condition with only minor damage in the local areas. The coating had overcome the major cavitation and erosion problems and was easily repaired with minimal downtime. The client was satisfied with the Belzona solution.

 
 

Photographs Description

  1. Overview of the rudders
  2. Close-up view of a damaged area
  3. Belzona 1341 applied as the first coat
  4. Application completed with a coating of Belzona 2141
 
Case study pic one

 

 
 Case study pic two

 

 
 Case study pic three

 

 
 Case study pic four

 

 
 
For more information about Belzona visit: www.belzona.com