Sacrificial Anodes
Marine Sacrificial Anodes & Corrosion Protection
Shop Marine Sacrificial Anodes
Find zinc anodes, aluminum anodes, magnesium anodes, anode kits, shaft anodes, trim tab anodes, engine anodes, outdrive anodes, propeller anodes, and installation hardware for corrosion protection in saltwater, brackish water, and freshwater applications.
Match anode material to your water type, then confirm dimensions, mounting style, and exact application.
Always confirm anode material, dimensions, fastener style, and application for your vessel, drive, engine, shaft, or underwater hardware.
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Choose the anode material, kit, or application that matches your water type and the metal component you need to protect.
Why It Matters
Anodes Help Protect Underwater Metals from Corrosion
Sacrificial anodes are designed to corrode before more valuable underwater metals such as shafts, propellers, trim tabs, outdrives, thru-hulls, and engine cooling components.
Using the correct anode material and replacing anodes before they are fully consumed helps reduce galvanic corrosion and supports longer component life.
Match Water Type
Zinc is commonly used for saltwater, aluminum can work in saltwater and brackish water, and magnesium is typically used for freshwater applications.
Confirm Shape and Size
Check diameter, length, hole spacing, thread, mounting hardware, contact surface, and whether the anode fits a shaft, tab, drive, engine, or propeller.
Use Kits When Possible
Anode kits help replace multiple matched pieces on a drive or engine at the same time, reducing missed parts during seasonal service.
Parts Desk Guidance
Single Anode or Complete Kit?
If one anode is damaged, missing, or consumed faster than the rest, a single replacement may be enough. For seasonal service or unknown history, a complete anode kit can be the better choice because it refreshes all key protection points together.
Common Questions
Sacrificial Anode Buying Help
How do I choose the correct anode material?
Start with the water type and manufacturer recommendation. Zinc is often used in saltwater, aluminum is common for saltwater or brackish use, and magnesium is typically for freshwater.
When should sacrificial anodes be replaced?
Replace anodes when they are heavily wasted, loose, damaged, missing, or near half consumed. Inspect them regularly and during seasonal service.
Can I mix zinc, aluminum, and magnesium anodes?
Avoid mixing anode materials on the same bonded system unless the manufacturer specifically allows it. Mixed materials can reduce protection or cause uneven performance.
Why do anode dimensions matter?
Anodes need solid metal-to-metal contact and the correct mounting shape. Wrong dimensions, paint, loose fasteners, or poor contact can prevent proper protection.
Ready to Find Your Part?
Search Zinc, Aluminum, Magnesium Anodes & Kits
Use the collection page or search by water type, brand, application, kit, drive model, shaft size, or existing part number.
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Zinc Pencil Anode Plug ED0090802150-S Lombardini ZF 1/4 BSPT
The ED0090802150-S is a zinc anode plug used as a pencil-anode style corrosion-protection part in marine engine cooling systems. Current references...
View full detailsAluminum Streamline Shaft Anode 1" CMT-X03AL
The CMT-X03AL is an aluminum streamline shaft anode designed for 1" propeller shafts, providing reliable sacrificial corrosion protection for inboa...
View full detailsAluminum Rudder Anode 5" CMT-R04AL
Marine-grade aluminum rudder anode designed to provide reliable cathodic protection for your vessel's rudder assembly in saltwater environments. Th...
View full detailsAluminum Rudder Anode 2-13/16" CMT-R02AL
The CMT-R02AL is a 2-13/16" aluminum rudder anode designed to protect rudders and submerged metal components from galvanic corrosion. Manufactured ...
View full detailsAluminum Propeller Nut Anode 7/8" CMT-PNDAF14
The CMT-PNDAF14 is a 7/8" aluminum propeller nut anode designed to protect propeller nuts, shafts, and surrounding running gear from galvanic corro...
View full detailsAluminum Hull Anode with Stainless Steel Strap 5" x 2-1/4" x 1" CMT-Z06SA
The CMT-Z06SA is a marine-grade aluminum hull anode with integrated stainless steel strap, designed to provide effective galvanic corrosion protect...
View full detailsAluminum Hull Anode CMT-ZHC2AA
The CMT-ZHC2AA is a marine-grade aluminum hull anode designed to protect hull-mounted metal components from galvanic corrosion. Engineered for long...
View full detailsAluminum Hull Anode with Aluminum Strap 6" x 3-1/2" x 1" CMT-Z04AA
The CMT-Z04AA is a marine-grade aluminum hull anode with integrated aluminum strap, designed to provide reliable galvanic corrosion protection for ...
View full detailsAluminum Hull Anode with Aluminum Strap 5" x 2-1/4" x 1" CMT-Z06AA
The CMT-Z06AA is a marine-grade aluminum hull anode with integrated aluminum strap, designed to provide effective galvanic corrosion protection for...
View full detailsAluminum Hull Anode with Aluminum Strap 12" x 3" x 1-1/4" CMT-Z03AA
The CMT-Z03AA is a large-format aluminum hull anode with integrated aluminum strap, designed to deliver maximum corrosion protection for hulls and ...
View full detailsAluminum Hull Anode 4" Style B Round 1/2" Hole CMT-H2B4375GA
The CMT-H2B4375GA is a 4" round Style B aluminum hull anode with a 1/2" center mounting hole, designed to protect bonded underwater metals from gal...
View full detailsAluminum Donut Shaft Anode 1-1/2" CMT-C07AL
The CMT-C07AL is a 1-1/2" aluminum donut shaft anode designed to protect propeller shafts and running gear from galvanic corrosion. This two-pi...
View full detailsAluminum Diver's Dream Hull Anode 1/2" x 4" x 6" CMT-DIVERMINIA
The CMT-DIVERMINIA is a low-profile aluminum hull anode designed specifically for diver-installed corrosion protection. Its slim 1/2" profile allow...
View full detailsAluminum Diver's Dream Hull Anode 1/2" x 12" x 6" CMT-DIVERA
The CMT-DIVERA is a large-format low-profile aluminum hull anode designed for maximum corrosion protection on vessels requiring extended coverage. ...
View full detailsAluminum Bolt-On Round Plate Anode 4" x 1" CMT-RP4A
The CMT-RP4A is a 4" diameter aluminum bolt-on round plate anode designed to provide reliable corrosion protection for hulls and underwater metal c...
View full detailsAluminum Bennett Trim Tab Anode CMT-BNT1AKITA
The CMT-BNT1AKITA is a complete aluminum trim tab anode kit designed specifically for Bennett trim tab systems. Engineered to protect trim tabs and...
View full detailsZinc Streamline Shaft Anode 1-1/2" CMT-X07
The CMT-X07 is a streamlined zinc shaft anode designed for 1-1/2" propeller shafts, providing reliable sacrificial corrosion protection for inboard...
View full detailsMax Prop Zinc Anode 83mm (83maxprop)
The 83mm Max Prop zinc anode is a sacrificial propeller anode designed specifically for Max-Prop feathering propellers with an 83mm hub. It protect...
View full detailsAluminum Rudder Anode 3-3/4" CMT-R03AL
The CMT-R03AL is a 3-3/4" aluminum rudder anode (R-3 style) designed to protect rudders and trim tabs from galvanic corrosion. This compact clamshe...
View full detailsZinc Rudder Anode 3-3/4" CMT-R03
The CMT-R03 is a 3-3/4" zinc rudder anode (R-3 style) designed to protect rudders and trim tabs from galvanic corrosion in saltwater environments. ...
View full detailsMercury MerCruiser Aluminum Anode 8M0001734
OEM Aluminum Anode for Mercury MerCruiser Marine Engines Genuine Mercury MerCruiser aluminum anode provides essential corrosion protection for ster...
View full detailsMercury MerCruiser Quicksilver Verado Power Trim Transom Anode – 97-8M0012083
The Mercury 97-8M0012083 is a genuine OEM aluminum anode designed specifically for Verado outboards, providing critical corrosion protection for th...
View full detailsMercury OEM Aluminum Anode Plate V6 V8 FourStroke 175-300HP 8M0111654
Mercury / MerCruiser Quicksilver Anode Plate — 8M0111654 The Mercury Quicksilver 8M0111654 Anode Plate is a genuine OEM sacrificial corrosion anod...
View full detailsMercury MerCruiser Bravo Trim Cylinder Anode 8M011349
The Mercury Quicksilver 8M011349 Trim Cylinder Anode is a genuine OEM sacrificial corrosion anode designed for MerCruiser Bravo sterndrive trim...
View full detailsZinc Streamline Shaft Anode 7/8" | CMT-X02
Premium zinc streamline shaft anode designed for 7/8" propeller shafts. This hydrodynamic streamline design minimizes drag while providing essentia...
View full detailsMartyr Zinc Bearing Carrier Anode Volvo Penta SX CMT-3852970Z
The Martyr CMT-3852970Z is a zinc bearing carrier anode designed for select Volvo Penta sterndrive applications. It cross-references to Volvo Penta...
View full detailsMartyr Aluminum Anode Kit Volvo Penta 290 Dual Prop CMT-290DPKITA
The Martyr CMT-290DPKITA is an aluminum anode kit for Volvo Penta 290 Dual Prop / 290DP sterndrive applications. It is designed to provide sacrific...
View full detailsMartyr Zinc Transom Bar Anode Volvo Penta SXA DPS CMT-3588745Z
The Martyr CMT-3588745Z is a zinc transom bar anode for select Volvo Penta sterndrive applications. It is commonly cross-referenced to Volvo Penta ...
View full detailsAluminum Volvo SXA/DPS Upper Gear Housing Anode | CMT-3883728A
Premium aluminum upper gear housing anode engineered specifically for Volvo Penta SXA and DPS drive systems. This precision-manufactured anode prov...
View full detailsMartyr Zinc Small Plate Anode Volvo Penta QL Bow Thruster CMT-41100276Z
The Martyr CMT-41100276Z is a zinc small plate anode for select Volvo Penta QL bow thruster applications. It is a bolt-on sacrificial anode designe...
View full detailsMartyr Zinc Dogbone Anode Volvo Penta SX DP CMT-832598Z
The Martyr CMT-832598Z is a zinc dogbone-style sacrificial anode for select Volvo Penta sterndrive applications. It is commonly cross-referenced to...
View full detailsZinc Volvo Bolt Anode M8-D16x30-M7/16W | CMT-838929Z
Premium zinc bolt anode engineered for Volvo Penta marine drives. This precision-manufactured bolt-style anode features M8 thread with D16x30 dimen...
View full detailsVolvo Penta 290 Outdrive Zinc Bar Anode CMT-852835Z
The CMT-852835Z is a zinc bar anode designed for Volvo Penta 290 sterndrive (outdrive) systems, providing essential galvanic corrosion protection t...
View full detailsMartyr Zinc Duo-Prop Ring Anode Volvo Penta CMT-875821Z
The Martyr CMT-875821Z is a zinc ring anode for select Volvo Penta Duo-Prop / DP outdrive applications. Current supplier and manufacturer refer...
View full detailsMartyr Aluminum Anode Kit Volvo Penta DPH DPR CMT-DPHKITA
The Martyr CMT-DPHKITA is an aluminum anode kit for Volvo Penta DPH and DPR sterndrives, built to help protect the drive from galvanic corrosion in...
View full detailsZinc Anode Kit for Volvo DPH/DPR Drives - CMT-DPHKITZ
Premium zinc anode kit engineered for Volvo Penta DPH and DPR drive systems. Complete corrosion protection solution designed to safeguard critical ...
View full detailsMercury OEM Aluminum Anode Kit V8 Verado 250-300HP 8M0205955
The Mercury 8M0205955 is a genuine OEM aluminum anode kit for select Mercury 4.6L V8 250–300 HP outboards and Mercury Racing 250R / 300R Verado app...
View full detailsLewmar Bowthruster Anode
Lewmar bowthruster anode for corrosion protection. Essential replacement part for maintaining your Lewmar bowthruster system and preventing galvani...
View full detailsMartyr Aluminum Anode Kit Volvo Penta SX Drive CMT-SXKITA
The Martyr CMT-SXKITA is an aluminum anode kit designed to protect Volvo Penta SX sterndrives from galvanic corrosion. It includes replacement anod...
View full detailsZinc Rudder Anode 2-13/16" - Marine Corrosion Protection
Zinc rudder anode 2-13/16" designed for marine corrosion protection. This sacrificial anode protects rudders and underwater metal components from g...
View full detailsZinc Anode for E00 - 1/4" UNC Thread - Marine Corrosion Protection
Zinc anode replacement for E00 series with 1/4" UNC thread, designed for marine corrosion protection. This sacrificial anode protects underwater me...
View full detailsMartyr Zinc Anode Trim Shield CMT-3841427Z
Martyr CMT-3841427Z is a genuine zinc trim/transom shield anode for selected Volvo Penta sterndrive applications. Current listings identify this pa...
View full detailsMartyr Zinc Block Anode Mercury CMT-43994Z
The Martyr CMT-43994Z is a zinc block-style sacrificial anode for select Mercury and MerCruiser applications. Current listings commonly identify it...
View full detailsMartyr Zinc Bracket Anode Mercury Outboard CMT-89949
The Martyr CMT-89949 is a zinc bracket / transom bracket anode for select Mercury / Mariner outboard applications. Current listings consistently id...
View full detailsYanmar OEM Internal Engine Anode 27210-200200
The Yanmar 27210-200200 is a genuine OEM sacrificial anode designed for Yanmar marine diesel engines, providing cathodic protection for internal co...
View full detailsYanmar OEM Internal Engine Anode 120650-18530
Genuine OEM Yanmar sacrificial anode (part number 120650-18530) designed to protect your engine's cooling system from galvanic corrosion. This fact...
View full detailsMerCruiser Zinc Anode Kit Bravo 3 2004+ CMT-BRAVO3KITZ
The MerCruiser Bravo 3 Zinc Anode Kit CMT-BRAVO3KITZ is a complete sacrificial anode kit for Bravo 3 sterndrives from 2004 and newer. This kit is d...
View full detailsMercury Verado 6 Trim Cylinder Zinc Anode - 892227Z
The Mercury Verado 6 Trim Cylinder Zinc Anode 892227Z is a sacrificial corrosion-protection anode used on Verado 6-cylinder trim-cylinder applicati...
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