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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Martyr CMDIVERMINI Mini Hull Plate Anode β Zinc | 6β³ Γ 4β³ Γ Β½β³ | Salt Water
Martyr CMDIVERMINI β Mini Hull Plate Anode | Zinc | 6β³ Γ 4β³ Γ Β½β³ | Salt Water Part Number: CMDIVERMINI (SKU: 194-CMDIVERMINI) Brand: Martyr Anodes...
View full detailsMartyr CM832598M Magnesium Transom Plate Anode β Volvo Penta 280/290
Martyr Magnesium Transom Plate Anode β Volvo Penta 280/290Replace the transom plate anode on your Volvo Penta 280 or 290 sterndrive with this magne...
View full detailsMartyr CMBRAVO1KITM Magnesium Anode Kit β MerCruiser Bravo I | Freshwater
Martyr Magnesium Anode Kit for MerCruiser Bravo I β FreshwaterA complete set of sacrificial anodes for the MerCruiser Bravo I sterndrive, formulate...
View full detailsMartyr CM832598A Aluminum Transom Plate Anode β Volvo Penta 280/290
Martyr CM832598A β Aluminum Transom Plate Anode for Volvo PentaPart Number: CM832598A Β |Β SKU: 194-CM832598A Β |Β Replaces OEM: 832598The Martyr CM8...
View full detailsMartyr CMBRAVO1KITA Aluminum Anode Kit β MerCruiser Bravo I
Martyr CMBRAVO1KITA β Aluminum Anode Kit for MerCruiser Bravo IPart Number: CMBRAVO1KITA Β |Β SKU: 194-CMBRAVO1KITAA complete aluminum anode kit eng...
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Martyr CMDIVERHA Heavy Hull Plate Anode β Aluminum | 1β³ Γ 6β³ Γ 12β³ | Salt & Brackish Water
Martyr CMDIVERHA Heavy Hull Plate Anode β Aluminum | 1β³ Γ 6β³ Γ 12β³ | Salt & Brackish Water
Martyr CMDIVERHA β Heavy Hull Plate Anode | Aluminum | 1β³ Γ 6β³ Γ 12β³ | Salt & Brackish Water Part Number: CMDIVERHA (SKU: 194-CMDIVERHA) Brand...
View full detailsMartyr CMDIVERHZ Heavy Hull Plate Anode β Zinc | 1β³ Γ 6β³ Γ 12β³ | Salt Water
Martyr CMDIVERHZ β Heavy Hull Plate Anode | Zinc | 1β³ Γ 6β³ Γ 12β³ | Salt Water Part Number: CMDIVERHZ (SKU: 194-CMDIVERHZ) Brand: Martyr Anodes Off...
View full detailsMartyr CMDIVERA Hull Plate Anode β Aluminum | Β½β Γ 6β Γ 12β | Salt & Brackish Water
Martyr CMDIVERA β Aluminum Hull Plate Anode | Β½β Γ 6β Γ 12β | Salt & Brackish Water Part Number: CMDIVERA (SKU: 194-CMDIVERA) Brand: Martyr An...
View full detailsMartyr CM6H14525102Z Yamaha Transom Bar Anode β Zinc | Salt Water
Martyr CM6H14525102Z β Yamaha Transom Bar Anode | Zinc | Salt Water Part Number: CM6H14525102Z (SKU: 194-CM6H14525102Z) Brand: Martyr Anodes Offic...
View full detailsMartyr MerCruiser Alpha I Gen II Anode Kit β Magnesium | Freshwater, 1991βPresent (CMALPHAKITM)
Martyr MerCruiser Alpha I Gen II Anode Kit β Magnesium | Freshwater, 1991βPresent (CMALPHAKITM)The Martyr CMALPHAKITM is a complete magnesium anode...
View full detailsMartyr Yamaha Transom Bar Anode β Aluminum | Saltwater & Brackish (CM6H14525102A)
Martyr Yamaha Transom Bar Anode β Aluminum | Saltwater & Brackish (CM6H14525102A)The Martyr CM6H14525102A is an aluminum sacrificial anode desi...
View full detailsMartyr CMALPHAKITZ MerCruiser Alpha I Gen II Anode Kit β Zinc | Saltwater, 1991βPresent
Martyr CMALPHAKITZ β MerCruiser Alpha I Generation II Zinc Anode Kit | 1991βPresent Part Number: CMALPHAKITZ (SKU: 194-CMALPHAKITZ) Brand: Martyr ...
View full detailsMartyr BRP / OMC Cobra Stern Drive Anode Kit β Aluminum | Saltwater & Brackish (CMCOBRAKITA)
Martyr BRP / OMC Cobra Stern Drive Anode Kit β Aluminum | Saltwater & Brackish (CMCOBRAKITA)The Martyr CMCOBRAKITA is a complete aluminum anode...
View full detailsMartyr CMGROUPERM Grouper Hanging Anode with 15' Cable β Magnesium | Fresh Water
Martyr CMGROUPERM β Magnesium Grouper Hanging Anode with 15' Cable | Fresh Water Part Number: CMGROUPERM (SKU: 194-CMGROUPERM) Brand: Martyr Anode...
View full detailsMartyr BRP / OMC Cobra Stern Drive Anode Kit β Magnesium | Freshwater (CMCOBRAKITM)
Martyr BRP / OMC Cobra Stern Drive Anode Kit β Magnesium | Freshwater (CMCOBRAKITM)The Martyr CMCOBRAKITM is a complete magnesium anode kit designe...
View full detailsMartyr CMGROUPERA Grouper Hanging Anode with 15' Cable β Aluminum | Salt & Brackish Water
Martyr CMGROUPERA β Aluminum Grouper Hanging Anode with 15' Cable Part Number: CMGROUPERA (SKU: 194-CMGROUPERA) Brand: Martyr Anodes Official Prod...
View full detailsMartyr MerCruiser Alpha I Gen II Anode Kit β Aluminum | Saltwater & Brackish, 1991βPresent (CMALPHAKITA)
Martyr MerCruiser Alpha I Gen II Anode Kit β Aluminum | Saltwater & Brackish, 1991βPresent (CMALPHAKITA)The Martyr CMALPHAKITA is a complete al...
View full detailsMartyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Zinc | Saltwater (CM984547Z)
Martyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Zinc | Saltwater (CM984547Z)The Martyr CM984547Z is a zinc sacrificial anode designed as a ...
View full detailsMartyr MerCruiser Alpha I Gen I Anode Kit β Aluminum | Saltwater & Brackish (CMALPHAGEN1KITA)
Martyr MerCruiser Alpha I Gen I Anode Kit β Aluminum | Saltwater & Brackish (CMALPHAGEN1KITA)The Martyr CMALPHAGEN1KITA is a complete aluminum ...
View full detailsMartyr Yamaha Transom Handle Anode β Aluminum | Saltwater & Brackish (CM6G54525101A)
Martyr Yamaha Transom Handle Anode β Aluminum | Saltwater & Brackish (CM6G54525101A)The Martyr CM6G54525101A is an aluminum sacrificial anode d...
View full detailsMartyr Grouper Hanging Anode with 15β Cable β Zinc | Saltwater (CMGROUPER)
Martyr Grouper Hanging Anode with 15β Cable β Zinc | Saltwater (CMGROUPER)The Martyr CMGROUPER is a zinc grouper-style hanging anode designed to pr...
View full detailsMartyr Yamaha Transom Handle Anode β Zinc | Saltwater (CM6G54525101Z)
Martyr Yamaha Transom Handle Anode β Zinc | Saltwater (CM6G54525101Z)The Martyr CM6G54525101Z is a zinc sacrificial anode designed as a direct OEM-...
View full detailsMartyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Aluminum | Saltwater & Brackish (CM984547A)
Martyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Aluminum | Saltwater & Brackish (CM984547A)The Martyr CM984547A is an aluminum sacrific...
View full detailsMartyr MerCruiser Alpha I Gen I Anode Kit β Magnesium | Freshwater (CMALPHAGEN1KITM)
Martyr MerCruiser Alpha I Gen I Anode Kit β Magnesium | Freshwater (CMALPHAGEN1KITM)The Martyr CMALPHAGEN1KITM is a complete magnesium anode kit de...
View full detailsMartyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Zinc | Saltwater (CM984513Z)
Martyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Zinc | Saltwater (CM984513Z)The Martyr CM984513Z is a zinc sacrificial anode designed as a ...
View full detailsMartyr Yamaha Transom Handle Anode β Magnesium | Freshwater (CM6G54525101M)
Martyr Yamaha Transom Handle Anode β Magnesium | Freshwater (CM6G54525101M)The Martyr CM6G54525101M is a magnesium sacrificial anode designed as a ...
View full detailsMartyr Limited Clearance Shaft Anode with Allen Screw β Zinc | Saltwater (CMC12)
Martyr Limited Clearance Shaft Anode with Allen Screw β Zinc | Saltwater (CMC12)The Martyr CMC12 is a zinc limited clearance shaft anode designed f...
View full detailsMartyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Magnesium | Freshwater (CM984547M)
Martyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Magnesium | Freshwater (CM984547M)The Martyr CM984547M is a magnesium sacrificial anode des...
View full detailsMartyr Volvo Penta SX Transom Plate Anode β Aluminum | Saltwater & Brackish (CM3855411A)
Martyr Volvo Penta SX Transom Plate Anode β Aluminum | Saltwater & Brackish (CM3855411A)The Martyr CM3855411A is an aluminum sacrificial anode ...
View full detailsMartyr Volvo Penta SX Transom Plate Anode β Zinc | Saltwater (CM3855411Z)
Martyr Volvo Penta SX Transom Plate Anode β Zinc | Saltwater (CM3855411Z)The Martyr CM3855411Z is a zinc sacrificial anode designed as a direct OEM...
View full detailsMartyr Yamaha Small Block Trim Tab Anode β Zinc | Saltwater (CM6E04525111Z)
Martyr Yamaha Small Block Trim Tab Anode β Zinc | Saltwater (CM6E04525111Z)The Martyr CM6E04525111Z is a zinc sacrificial anode designed as a direc...
View full detailsMartyr Volvo Penta SX Gimbal Plate Anode β Zinc | Saltwater (CM3854130Z)
Martyr Volvo Penta SX Gimbal Plate Anode β Zinc | Saltwater (CM3854130Z)The Martyr CM3854130Z is a zinc sacrificial anode designed as a direct OEM-...
View full detailsMartyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Magnesium | Freshwater (CM5007089M)
Martyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Magnesium | Freshwater (CM5007089M)The Martyr CM5007089M is a magnesium sacrificial anode d...
View full detailsMartyr Yamaha Outboard Trim Tab Anode β Aluminum | Saltwater & Brackish (CM6AW4525100A)
Martyr Yamaha Outboard Trim Tab Anode β Aluminum | Saltwater & Brackish (CM6AW4525100A)The Martyr CM6AW4525100A is an aluminum sacrificial anod...
View full detailsMartyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Aluminum | Saltwater & Brackish (CM5007089A)
Martyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Aluminum | Saltwater & Brackish (CM5007089A)The Martyr CM5007089A is an aluminum sacrif...
View full detailsMartyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Zinc | Saltwater (CM5007089Z)
Martyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Zinc | Saltwater (CM5007089Z)The Martyr CM5007089Z is a zinc sacrificial anode designed as ...
View full detailsMartyr Transom Bar Anode β Nissan / Tohatsu Outboard, Zinc | Saltwater (CM3C7602181A0Z)
Martyr Transom Bar Anode β Nissan / Tohatsu Outboard, Zinc | Saltwater (CM3C7602181A0Z)The Martyr CM3C7602181A0Z is a zinc sacrificial transom bar ...
View full detailsMartyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Zinc | Saltwater (CM398331Z)
Martyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Zinc | Saltwater (CM398331Z)The Martyr CM398331Z is a zinc sacrificial anode designed as a ...
View full detailsMartyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Magnesium | Freshwater (CM393023M)
Martyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Magnesium | Freshwater (CM393023M)The Martyr CM393023M is a magnesium sacrificial anode des...
View full detailsMartyr Yamaha Small Block Trim Tab Anode β Aluminum | Saltwater & Brackish (CM6E04525111A)
Martyr Yamaha Small Block Trim Tab Anode β Aluminum | Saltwater & Brackish (CM6E04525111A)The Martyr CM6E04525111A is an aluminum sacrificial a...
View full detailsMartyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Aluminum | Saltwater & Brackish (CM398331A)
Martyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Aluminum | Saltwater & Brackish (CM398331A)The Martyr CM398331A is an aluminum sacrific...
View full detailsMartyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Aluminum | Saltwater & Brackish (CM393023A)
Martyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Aluminum | Saltwater & Brackish (CM393023A)The Martyr CM393023A is an aluminum sacrific...
View full detailsMartyr Volvo Penta SX Gimbal Plate Anode β Aluminum | Saltwater & Brackish (CM3854130A)
Martyr Volvo Penta SX Gimbal Plate Anode β Aluminum | Saltwater & Brackish (CM3854130A)The Martyr CM3854130A is an aluminum sacrificial anode d...
View full detailsMartyr Suzuki Outboard Trim Tab Anode β Zinc | Saltwater (CM5532095310Z)
Martyr Suzuki Outboard Trim Tab Anode β Zinc | Saltwater (CM5532095310Z)The Martyr CM5532095310Z is a zinc sacrificial anode designed as a direct r...
View full detailsMartyr Anode Kit β Volvo Penta DPH/DPR Drive, Zinc | Saltwater (CM3858399KITZ)
Martyr Anode Kit β Volvo Penta DPH/DPR Drive, Zinc | Saltwater (CM3858399KITZ)The Martyr CM3858399KITZ is a complete zinc anode kit designed for Vo...
View full detailsMartyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Zinc | Saltwater (CM397768Z)
Martyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Zinc | Saltwater (CM397768Z)The Martyr CM397768Z is a zinc sacrificial anode designed as a ...
View full detailsMartyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Zinc | Saltwater (CM123009Z)
Martyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Zinc | Saltwater (CM123009Z)The Martyr CM123009Z is a zinc sacrificial anode designed as a ...
View full detailsMartyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Zinc | Saltwater (CM393023Z)
Martyr Anode β BRP / OMC / Johnson / Evinrude Outboard, Zinc | Saltwater (CM393023Z)The Martyr CM393023Z is a zinc sacrificial anode designed as a ...
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