Marine anodes, including zinc, aluminum, and magnesium anodes, are sacrificial metal components used to protect the hull and underwater metal parts of boats and yachts from galvanic corrosion. By corroding preferentially, the anodes help protect more valuable submerged components such as hull fittings, propeller shafts, rudders, trim tabs, and other bonded metal parts.
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1-2 weeks delivery time Tecnoseal zinc Baglietto-type stern disc sacrificial anodes with steel insert, available as anode only or as a complete kit with mounting components. Both versions measure Ø120 x 35 mm and feature Ø1 50x3 mm, Ø2 32 mm and Ø3 14 mm dimensions. Tecnoseal 00154 is supplied as the anode only and weighs 2.00 kg, while Tecnoseal 00154C is the complete 2.23 kg kit comprising 00154, 00153-PERNOCOMPLETO / nut, PP cap and pad. Select the required version according to supply configuration.
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$ 251.44
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1-2 weeks delivery time Tecnoseal zinc Vetus-type oval plate bolt-on sacrificial anodes for hull and transom applications. The range includes five models from 98 to 350 mm in length, 44 to 68 mm in width and 18 to 36 mm in height, with weights from 0.31 to 4.50 kg. Tecnoseal 00220-0, also referenced as Osculati 43.901.99, is the compact 98 x 44 x 18 mm version with 48.5 mm hole centres and Ø10.5 mm mounting holes. The larger models feature hole-centre distances from 80 to 200 mm, with Ø1 dimensions of 31–38 mm and slotted Ø2 mounting holes of 11x15 or 13x25 mm. Tecnoseal 00220 corresponds to Osculati 43.902.00 and original part number ZINK15C; 00221 corresponds to Osculati 43.902.01 and ZINK25C; 00222 corresponds to Osculati 43.902.11; and 00223 corresponds to Osculati 43.902.02 and ZINK35C.
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$ 33.27
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1-2 weeks delivery time Tecnoseal zinc Vetus-Type profiled bar bolt-on sacrificial anodes, available in two sizes with lengths of 152 and 250 mm and weights of 1.03 and 2.40 kg. Tecnoseal 03510 corresponds to original part number ZINK15SC and features 80 mm hole centres, while Tecnoseal 03511 corresponds to ZINK25SC with 140 mm hole centres. Both versions use Ø1 11 mm mounting holes with Ø2 11x15 mm recess dimensions. Select the required model according to overall dimensions, hole-centre distance and weight.
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$ 75.47
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1-2 weeks delivery time Tecnoseal zinc UK-Type bolt-on bar sacrificial anodes for Fairline hull and transom applications, available in two configurations. Tecnoseal 00269E measures 200 x 65 x 32 mm, weighs 1.30 kg and features 110 mm hole centres with Ø12 mm mounting holes. Tecnoseal 00270E measures 320 mm in length and 65 mm in width, weighs 2.20 kg and features 160 mm hole centres, 33 mm height, b 92 mm and c 12x65 mm mounting dimensions. Select the required model according to overall dimensions, hole-centre distance and weight.
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$ 77.46
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1-2 weeks delivery time Tecnoseal zinc UK-Type bolt-on bar sacrificial anodes for Fairline hull and transom applications, available in two sizes. Tecnoseal 00271E measures 310 x 75 x 40 mm, weighs 4.00 kg and features 205 mm hole centres, b 35 mm and c 13x25 mm mounting dimensions. Tecnoseal 00272E measures 455 x 94 x 40 mm, weighs 7.00 kg and features 230 mm hole centres, Ø 19x30 mm and Ø1 70 mm mounting dimensions. Select the required model according to overall dimensions, mounting configuration, hole-centre distance and weight.
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$ 199.22
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1-2 weeks delivery time Tecnoseal 00273E zinc UK-Type bolt-on bar sacrificial anode for Sunseeker hull and transom applications. The anode measures 450 x 105 x 50 mm, weighs 11.00 kg and features 230 mm hole centres. Mounting dimensions are Ø 19x30 mm with Ø1 70 mm. Select this model where the overall dimensions and mounting configuration match the existing installation.
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$ 429.57
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1-2 weeks delivery time Tecnoseal 03503 zinc Vetus-Type conical plate sacrificial anode for hull and transom applications. The anode measures Ø79 x 45 mm and weighs 1.05 kg. Technical dimensions include Ø1 11 mm, Ø2 46 mm and Ø3 34 mm. Select this model where the overall diameter, height and mounting dimensions match the existing installation.
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$ 71.38
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1-2 weeks delivery time Tecnoseal aluminium disc sacrificial anodes for rudders and trim tabs, available in Standard and Heavy configurations with outside diameters from Ø50 to Ø225 mm. The range includes single aluminium anodes weighing from 30 g to 2.50 kg, with heights from 11 to 33 mm and different central recess and fixing-hole diameters. Tecnoseal anodes are supplied individually without mounting hardware.
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$ 4.86
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1-2 weeks delivery time Tecnoseal CAL-series aluminium sacrificial anodes for marine rudders, available in Ø50, Ø70, Ø90 and Ø110 mm sizes. The range corresponds to Osculati Standard Rose aluminium rudder anodes 43.601.01, 43.601.02, 43.601.03 and 43.601.04 respectively. Osculati supplies these models as pairs with mounting bolt and nut, with total pair weights of 60, 160, 340 and 540 g, equivalent to 30, 80, 170 and 270 g per individual anode.
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$ 9.65
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1-2 weeks delivery time Tecnoseal aluminium USA Type disc sacrificial anode sets for marine rudders, supplied as pairs with mounting hardware. The range includes R1AL, R2AL, R3AL, R4AL, R5AL and R7AL models in nominal sizes from 1 7/8" x 1/4" to 6 1/2" x 7/8", with outside diameters from Ø47 to Ø165 mm and catalogue pair weights from 0.05 to 1.56 kg. Each set includes stainless steel mounting hardware with a hex nut and socket cap screw.
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$ 8.82
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1-2 weeks delivery time Tecnoseal magnesium disc sacrificial anodes for rudders and trim tabs, available in diameters from Ø50 to Ø225 mm. The range includes Standard Type models from Ø50 to Ø140 mm and Heavy Type models in Ø190 and Ø225 mm, with weights from 20 g to 1.56 kg. Depending on the model, overall height ranges from 11 to 33 mm, with Ø1 dimensions from 20 to 50 mm and Ø2 dimensions from 6.5 to 14 mm. Supplied individually without mounting hardware.
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$ 9.35
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1-2 weeks delivery time Tecnoseal magnesium Spanish Type sacrificial anode sets for marine rudders, supplied as a pair with mounting bolt and nuts. Available in Ø70, Ø90 and Ø130 mm sizes, with heights of 6.5, 7.7 and 9 mm and set weights of 60, 110 and 270 g respectively. All versions feature Ø13 mm and Ø8.5 mm central mounting dimensions.
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$ 29.92
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1-2 weeks delivery time Tecnoseal magnesium USA Type disc sacrificial anode sets for marine rudders, supplied as pairs with mounting hardware. The range includes R1MG, R2MG, R3MG, R4MG, R5MG and R7MG models in nominal sizes from 1 7/8" x 1/4" to 6 1/2" x 7/8", with outside diameters from Ø47 to Ø165 mm and catalogue pair weights from 0.03 to 1.00 kg. Each set includes a stainless steel hex nut and socket cap screw.
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$ 13.32
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1-2 weeks delivery time Tecnoseal zinc disc sacrificial anodes for rudders and trim tabs, available in Standard and Heavy configurations with diameters from Ø50 to Ø225 mm. The range includes individual zinc anodes weighing from 80 g to 6.20 kg, with heights from 11 to 33 mm and different central recess and fixing-hole diameters. Tecnoseal disc anodes are supplied individually without mounting hardware.
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$ 6.84
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1-2 weeks delivery time Zinc sacrificial anode pairs for marine rudders, supplied with mounting hardware and available in Tecnoseal Spanish Type and Osculati Standard Rose configurations. The range covers diameters from Ø50 to Ø130 mm, including Light and Heavy Osculati versions and Tecnoseal Spanish Type models.
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$ 4.59
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1-2 weeks delivery time Tecnoseal zinc USA Type disc sacrificial anode sets for marine rudders, supplied as pairs with mounting hardware. The range includes R1, R2, R3, R4, R5 and R7 models in nominal sizes from 1 7/8" x 1/4" to 6 1/2" x 7/8", with outside diameters from Ø47 to Ø165 mm and catalogue pair weights from 0.12 to 3.90 kg. Each set includes a stainless steel hex nut and socket cap screw.
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$ 12.96
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1-2 weeks delivery time Tecnoseal aluminium Oval Type weld-on sacrificial anodes with integrated mounting strap for hull and transom applications. The range includes 14 models weighing from 0.39 to 5.50 kg, with anode body dimensions from 100 × 60 × 18 mm to 400 × 152 × 33 mm and strap sizes from 200 × 25 × 5 mm to 550 × 40 × 6 mm. The standard configuration uses a steel insert, while aluminium or stainless steel inserts are available on request.
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$ 48.66
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1-2 weeks delivery time Tecnoseal aluminium weld-on sacrificial anodes with aluminium mounting strap, suitable for aluminium hull applications. The range includes two versions: TA0107 with a 115 × 60 × 17 mm anode body, 200 × 25 mm aluminium strap and 0.30 kg weight, and TA0108 with a 220 × 70 × 29 mm anode body, 300 × 25 mm aluminium strap and 1.00 kg weight. Select the required version according to body dimensions, weight and strap size.
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$ 14
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1-2 weeks delivery time Tecnoseal aluminium Spanish Type weld-on sacrificial anodes with integrated insert for hull and transom applications. The range includes six models weighing from 0.20 to 2.50 kg, with anode body dimensions from 120 × 40 × 22.5 mm to 250 × 90 × 50 mm and strap sizes from 205 × 15 × 3 mm to 400 × 30 × 6 mm. The standard version is supplied with a steel insert, while aluminium or stainless steel inserts are available on request.
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$ 29.19
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1-2 weeks delivery time Tecnoseal aluminium Teardrop Type weld-on sacrificial anodes with integrated mounting strap, available in seven sizes from 0.60 to 5.05 kg. The range covers anode body dimensions from 120 × 78 × 25 mm to 280 × 175 × 60 mm, with strap sizes from 230 × 25 × 5 mm to 400 × 30 × 6 mm. The standard version is supplied with a steel insert, while aluminium or stainless steel inserts are available on request.
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$ 43.67
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How do Aluminum, Zinc, and Magnesium Anodes differ in protecting a boat?
Aluminum, zinc, and magnesium anodes all provide cathodic protection by acting as sacrificial metals, but their effectiveness depends on the water type and their electrochemical potential. Zinc anodes are traditionally used in saltwater and provide reliable protection in high-salinity environments. Aluminum anodes are more electrochemically active than zinc and offer a higher protective capacity for their weight, making them suitable for saltwater and brackish water and, with the correct alloy, many freshwater applications. Magnesium is the most active of the three materials and is primarily intended for freshwater, where its higher driving voltage provides effective protection in low-conductivity conditions. Magnesium anodes should generally not be used in saltwater or brackish water, as they may provide excessive protection and be consumed too rapidly.
Why is anode placement on the hull plate important for effective corrosion protection?
Correct anode placement is essential because sacrificial anodes must be electrically connected to the metal they protect and positioned where protective current can reach exposed underwater surfaces effectively. On metal hulls, anodes should be distributed around areas that are most susceptible to galvanic corrosion, including the hull plating, rudder, propeller shaft, stern gear, and other submerged metal components. Poorly positioned, undersized, or electrically isolated anodes may leave parts of the structure insufficiently protected. Proper distribution helps maintain a more uniform protective potential across the underwater metalwork and reduces the risk of localized corrosion.