Hull anodes
Bolted and welded sacrificial anodes for hulls
Deepwater’s aluminum and zinc hull anodes can be cast to suit any type of hull conditions
Deepwater's aluminum (Al) and zinc (Zn) sacrificial hull anodes can be manufactured in a wide variety of configurations, either to be welded or bolted on. All "standard" configurations are shown below. In addition to these, Deepwater can cast anodes to any size or chemical composition specifications required. Please contact us for advice on optimizing an anode to suit your specific requirements.
Specifications
BOLTED
| Anode type | Al / Zn | Gross weight (kg) | Net weight (kg) | L1 (mm) | L2 (mm) | W (mm) | T (mm) | D (mm) |
|---|---|---|---|---|---|---|---|---|
| A3.5HB | Al | 3.6 | 3.5 | 160 | 300 | 150 | 32 | 26 |
| A5.0HB | Al | 5.2 | 5 | 160 | 300 | 150 | 50 | 26 |
| A6.5HB | Al | 6.7 | 6.5 | 160 | 300 | 150 | 60 | 26 |
| A7.0HB | Al | 7.2 | 7 | 230 | 450 | 120 | 50 | 16 |
| A12.5HB | Al | 12.8 | 12.5 | 160 | 300 | 150 | 115 | 26 |
| Z10.0HB | Zn | 10.2 | 10 | 160 | 300 | 150 | 32 | 26 |
| Z15.2HB | Zn | 15.4 | 15.2 | 160 | 300 | 150 | 50 | 26 |
| Z18.7HB | Zn | 19.0 | 18.7 | 160 | 300 | 150 | 60 | 26 |
| Z18.4HB | Zn | 18.6 | 18.4 | 230 | 450 | 120 | 50 | 16 |
| Z35.9HB | Zn | 36.3 | 35.9 | 160 | 300 | 150 | 115 | 26 |
WELDED
| Anode type | Al / Zn | Gross weight (kg) | Net weight (kg) | L (mm) | W (mm) | T (mm) | D (mm) |
|---|---|---|---|---|---|---|---|
| A1.0H1 | Al | 1.2 | 1.0 | 150 | 58 | 45 | 300 |
| A2.0H1 | Al | 2.2 | 2.0 | 200 | 100 | 40 | 350 |
| A5.0H1 | Al | 5.5 | 5.0 | 300 | 150 | 50 | 450 |
| A12.0H1 | Al | 12.5 | 12.0 | 530 | 130 | 66 | 680 |
| A14.0H1 | Al | 14.6 | 14.0 | 610 | 135 | 70 | 760 |
| Z1.0H1 | Zn | 1.3 | 1.0 | 238 | 32 | 23 | 388 |
| Z3.0H1 | Zn | 3.1 | 3.0 | 160 | 85 | 33 | 310 |
| Z9.5H1 | Zn | 9.7 | 9.5 | 355 | 85 | 45 | 505 |
| Z15.0H1 | Zn | 16.0 | 15.0 | 450 | 155 | 31 | 600 |
| Z30.0H1 | Zn | 31.4 | 30.0 | 200 | 100 | 40 | 350 |
| Alloy type | Deep 7 | Deep 10 |
|---|---|---|
| Open circuit potential | (-) 1.08 V vs Ag/AgCl sw. | (-) 1.08 V vs Ag/AgCl sw. |
| Closed circuit potential(1) | (-) 1.05 V vs Ag/AgCl sw, | (-) 1.05 V vs Ag/AgCl sw, |
| Seawater capacity @25C | 1100 A-Hr/lb. (2420 A-Hr/Kg.) | 1100 A-Hr/lb. (2420 A-Hr/Kg.) |
| Seawater capacity @ 5C | 1100 A-Hr/lb. (2420 A-Hr/Kg.) | Variable (2) |
| Seabed mud capacity (3) | 950 A-Hr/lb (2090 A-hr/Kg.) | 950 A-Hr/lb (2090 A-hr/Kg.) |
| Seabed mud capacity @ 5C | 950 A-Hr/lb (2090 A-hr/Kg.) | Variable (2) |
| Alloy density | 0.098 lb/in3 (2.71 gm/cm3) | 0.098 lb/in3 (2.71 gm/cm3) |
| Cost ratio | Low Iron (Fe) Aluminum (Al) Ingot < 0.05 Fe |
Normal Grade Al Sows |
| Raw material and conversion | 1.10 | 1.00 |
| Recommended environment | Any ocean. any depth. any temperature. | Any tropical ocean < 600 fsw (180 Msw) with mean water temperature higher than 45 F (7C). |
| Deep 7 | Deep 10 | ||
|---|---|---|---|
| Iron (Fe) | 0.07 max | Iron (Fe) | 0.10 max |
| Silicon (Si) | 0.10 max | Silicon (Si) | 0.10 max |
| Copper (Cu) | 0.003 max | Copper (Cu) | 0.006 max |
| Zinc (Zn) | 4.75 - 5.25 | Zinc (Zn) | 3.00 - 6.00 |
| Indium (In) | 0.015 - 0.025 | Indium (In) | 0.010 - 0.020 |
| Titanium (Ti) | 0.025 max | Titanium (Ti) | 0.025 max |
| Cadmium (Cd) | Part of others | Cadmium (Cd) | Part of others |
| Others (each) | 0.02 max | Others (each) | 0.02 max |
| Aluminum (Al) | Remainder | Aluminum (Al) | Remainder |
Gallery
Diver installed
Dual clamp on anodes installed on the shallow portions of the structure.
Replace depleted anodes
Dual clamp-on anodes are designed to replace platform anodes on structural members.
Supplemental current
On deeper structures, it is sometimes necessary to use a combination of Retropods on the sea floor and Dual clamp-ons near the surface.
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