Table 3 – Surface Corrosion Data – Seawater
CAL Elite Marine Alloys | Other commonly used Marine-Alloys (also offered by CAL) | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Material | Extreme Strength Cupro Nickel | High Strength Copper-Nickel-Manganese-Aluminium Alloy | Wrought Copper-Nickel-Chrome (CNC) Alloy | Wrought Nickel Aluminium Bronze (NAB) | 70/30 Cupro Nickel | 90/10 Cupro Nickel | Naval Brass | Nickel-Copper Alloy | Nickel-Copper-Aluminium-Titanium Alloy | Stainless Steel | Stainless Steel |
Base composition | CuAl14Al2 | CuNi15Mn4 Al1Fe |
CuNi30Cr1 MnFeSiZrTi |
CuAl9Ni5 Fe4 |
CuNi30Mn1 Fe |
CuNi30Mn1 Fe |
CuZn37Sn1 | NiCu30Fe2 Mn1 |
NiCu30Al3 Fe1MnTi |
FeCr18Ni9 | FeCr18Ni12 Mo2 |
Specification →
Property ↓ |
CAL T-1000(DIN 2.1504) |
CAL T-850(Def Stan 02-835) |
CAL CNC-1 / CNC-2(Def Stan 02-824) |
Def Stan (NES) 833 / CW307G | Def Stan (NES) 780 / CN107 / C71500 / CW354H | Def Stan (NES) 779 / CN102 / C70600 / CW352H | CZ112 / CW712R / C46400 | NA13 / UNS N04400 | NA18 / UNS N05500 | 304 stainless | 316 stainless |
General corrosion rate mm/year | 0.02mm / 0.0008″ | 0.025mm / 0.001″ | 0.02mm / 0.0008″ | 0.025-0.05mm / 0.001-0.002″ | 0.03mm / 0.001″ | 0.03mm / 0.001″ | 0.05mm / 0.002″ (4 x at 60℃) | 0.03mm / 0.001″ | 0.03mm / 0.001″ | 0.025mm / 0.001″ | 0.025mm / 0.001″ |
Crevice corrosion rate mm/year | <0.02mm / 0.0008″ | <0.025mm / 0.001″ | <0.02mm / 0.0008″ | 0.5-1.0mm / 0.002-0.004″ |
0.025-0.13mm / 0.001-0.005″ | 0.025-0.13mm / 0.001-0.005″ | 0.15mm / 0.006″ | 0.5mm / 0.020″ | 0.05mm / 0.002″ | 0.25mm / 0.010″ | >0.13mm / 0.005″ |
Selective Phase Corrosion mm/year | None | None | None | 0.5-1.0mm / 0.002-0.004″ |
None | None | Yes 0.15mm / 0.006″ | None | None | None | None |
Impingement resistance limit m/second | 3.7 (12ft/sec.) | 3.7 (12ft/sec.) | 6-8 (20-26ft/sec.) | 4.3 (14ft/sec.) | 4.6 (15ft/sec.) | 3.7 (12ft/sec.) | 3.05 (10ft/sec.) | >9.1 (>30ft/sec.) | >9.1 (>30ft/sec.) | >9.1 (>30ft/sec.) | >9.1 (>30ft/sec.) |
Corrosion Potential in Seawater Vsce | -0.18 | -0.19 | -0.18 | -0.19 | -0.18 | -0.20 | -0.24 | -0.12 | -0.12 | -0.08 | -0.08 |
Marine bio-fouling resistance | Highly resistant | Highly resistant | Highly resistant | Partially resistant | Resistant | Highly resistant | Partially resistant | Not resistant | Not resistant | Not resistant | Not resistant |
Cast Def Stan 02-747 | |
---|---|
General corrosion rate | 0.07mm (0.002″) / year |
Crevice corrosion rate | 0.05mm (0.002″) / year |
Selective Phase Corrosion | 1.1mm (0.04″) / year typical
1.4mm (0.055″) / year observed |