MATERIAL USEDIN SHIPS
Materials used in ships sea water systems
90/10 Cupro-nickel
- 1. Resistant to high sea water velocities allowing reduced tube diameters
- 2. Resistant to corrosion under stagnant flow conditions and pitting
- 3. Resistant to clogging from marine growth
- 4. Ease of manufacture and welding
- 5. Reasonable cost
Stainless steel
- 1. Suffers from deep pitting in stagnant waters-if cleaned regularly this pitting can be reduced
Expected life spans of some materials
Galvanised steel- 6 to 9 years
Copper-Maximum vel 4ft/sec
90/10 Cupro-Nickel- 10yrs+
70/30 Cupro-Nickel- 22 yrs+
