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Aluminum Deepwater Gaus Anodes
ALLOY INFORMATION
The Deep10 aluminum alloy was designed as an effective, general purpose offshore alloy, for use in tropical water environments. In cold, deep water, the  alloy is more effective, as it has a lower Iron (Fe) content.
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Chemical Composition (% by weight) |
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| Iron (Fe) |
0.10 max |
Indium (In) |
0.01 - 0.05 |
| Silicon (Si) |
0.10 max |
Titanium (Ti) |
0.025 max |
| Copper (Cu) |
0.006 max |
Others (each) |
0.02 max |
| Zinc (Zn) |
2.0 - 6.0 |
Aluminum (Al) |
remainder |
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| Open Circuit Potential |
(-) 1.08 V vs Ag/AgCl sw. |
| Closed Circuit Potential(1) |
(-) 1.05 V vs Ag/AgCl sw, |
| Seawater Capacity @25C |
1100 A-Hr/lb. (2420 A-Hr/Kg.) |
| Seawater Capacity @ 5C |
Variable (2) |
| Seabed Mud Capacity (3) |
950 A-Hr/lb (2090 A-hr/Kg.) |
| Seabed Mud Capacity @ 5C |
Variable (2) |
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| Alloy Density |
0.098 lb/in3 (2.71 gm/cm3) |
| Cost Ratio |
Normal Grade Al Sows |
| Raw Material & Conversion |
1.00 |
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| Offshore Structures (Platforms, Pipelines, FPS, FPSO, MODU, SPAR, Subsea Structure, Risers, Wind Turbine, etc) |
Any Tropical Ocean < 600 fsw (180 Msw) with mean water temperature higher than 45 F (7C). |
| Inshore Structures (Ports, Harbors, Jetties, Wind farms, Locks, Dams, Bridges, Piers etc.) |
Any Body of water < 600 fsw (180 Msw) with mean water temperature higher than 45 F (7C), Chloride Ion Concentration > 12 ppt. Resistivity < 200 ohm-cm. |
| Produced Water Vessels & Tanks |
Any produced brine < 140 F(60 C)(4) |
| Seawater Ballast Tanks |
Suitable for most seawater applications (5). |
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| 1 - Recommended number to use when designing CP systems. |
| 2 - Activation can be a problem with chemistries at extremes of specification in cold water. |
| 3 - Recommended number to use when designing CP systems for offshore pipelines using bracelet or sub bottom anode systems. |
| 4 - Consult a CP Specialist for guidance at elevated temperatures as performance de-rating will be needed. |
| 5 - Exercise care with variable ballast tanks as dangerous volumes of hydrogen can be generated under certain conditions. |
| For additional guidance in application of these alloys, contact Deepwater. |
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The AC induction furnace pouring an aluminum platform anode by remote operation.
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