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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.

Shop Sacrificial Anodes Zinc Anodes Anode Kits
Material Guide

Match anode material to your water type, then confirm dimensions, mounting style, and exact application.

Read Corrosion Protection Guide

Always confirm anode material, dimensions, fastener style, and application for your vessel, drive, engine, shaft, or underwater hardware.

Volvo Penta Mercury / MerCruiser Yanmar Crusader Indmar PCM Shaft Anodes Trim Tab Anodes Outdrive Anodes Propeller Anodes Engine Anodes

Top OEM Anode Searches

Volvo Penta Mercury / MerCruiser Yanmar Crusader Indmar PCM

Highlighted Anode Categories

Zinc AnodesCommon saltwater protection Aluminum AnodesSaltwater and brackish use Magnesium AnodesFreshwater applications Anode KitsMatched service sets Shaft AnodesProp shaft protection Trim Tab AnodesTabs and planes Engine AnodesCooling-system protection Outdrive AnodesSterndrive protection Propeller AnodesProp and hub protection

Browse Fast

Shop by Anode Category

Choose the anode material, kit, or application that matches your water type and the metal component you need to protect.

All Sacrificial Anodes Zinc Anodes Aluminum Anodes Magnesium Anodes Anode Kits Shaft Anodes Installation Hardware

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.

H2O

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.

FIT

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.

KIT

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.

Choose zinc anodes For many saltwater applications where zinc is specified by the manufacturer or existing setup.
Choose aluminum anodes For many saltwater and brackish applications, especially where aluminum anodes are specified for drives or kits.
Choose magnesium anodes For freshwater applications where magnesium is required and saltwater exposure is not expected.
Choose anode kits For matched replacement sets on outdrives, engines, trim systems, thrusters, or other grouped applications.

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.

Shop All Anodes Corrosion Guide Volvo Penta Mercury / MerCruiser Yanmar Crusader Indmar PCM

Filters

Zinc Shaft Collar Anode 30mm ID – CMT-C30

$30.74 - $30.74
$30.74
$30.74 - $30.74
$30.74
Only 1 left!

Martyr Zinc Shaft Collar Anode 30mm ID – CMT-C30Sacrificial zinc donut/collar anode for 30mm metric propeller shafts. Slides over the shaft to prot...

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$30.74 - $30.74
$30.74
$30.74 - $30.74
$30.74

Zinc Shaft Collar Anode 7/8" ID x 1" x 2-1/8" – CMT-C02

$19.21 - $19.21
$19.21
$19.21 - $19.21
$19.21
Only 3 left!

Martyr CMT-C02 is a zinc limited-clearance shaft collar anode designed for 7/8" propeller shafts. This split collar shaft anode helps protect prope...

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$19.21 - $19.21
$19.21
$19.21 - $19.21
$19.21

Zinc Diver's Dream HD Hull Anode 1" x 12" x 6" – CMT-DIVERHZ

$210.67 - $210.67
$210.67
$210.67 - $210.67
$210.67
33 in stock

Martyr CMT-DIVERHZ is a zinc Diver’s Dream heavy-duty hull anode measuring 1" x 12" x 6". This bolt-on hull/transom-style sacrificial anode is desi...

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$210.67 - $210.67
$210.67
$210.67 - $210.67
$210.67

Aluminum Hull Strap Anode 5" x 2-1/4" x 1" – CMT-Z06AZ

$38.74 - $38.74
$38.74
$38.74 - $38.74
$38.74
62 in stock

Martyr CMT-Z06AZ is an aluminum-strap zinc hull anode designed for weld-on hull and structure protection in saltwater service. This semi-streamline...

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$38.74 - $38.74
$38.74
$38.74 - $38.74
$38.74

Zinc Hull Strap Anode 12" x 3" x 1-1/4" – CMT-Z03SZ

$105.51 - $105.51
$105.51
$105.51 - $105.51
$105.51
51 in stock

Martyr CMT-Z03SZ is a zinc hull strap anode designed for weld-on hull and structure protection in saltwater service. This semi-streamlined strap-st...

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$105.51 - $105.51
$105.51
$105.51 - $105.51
$105.51

Zinc Hull Strap Anode 5" x 2-1/4" x 1" – CMT-Z06SZ

$38.88 - $38.88
$38.88
$38.88 - $38.88
$38.88
32 in stock

Martyr CMT-Z06SZ is a zinc hull strap anode designed for weld-on hull and structure protection in saltwater service. This semi-streamlined strap-st...

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$38.88 - $38.88
$38.88
$38.88 - $38.88
$38.88

Zinc OMC Long Bar Trim/Tilt Anode – CMT-433580Z

$28.12 - $28.12
$28.12
$28.12 - $28.12
$28.12
Only 4 left!

Martyr CMT-433580Z is a zinc long bar trim/tilt anode designed for OMC, Johnson, and Evinrude power trim and tilt bracket applications. This is a b...

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$28.12 - $28.12
$28.12
$28.12 - $28.12
$28.12

Zinc OMC Waffle Bar Anode – CMT-367Z

$25.42 - $25.42
$25.42
$25.42 - $25.42
$25.42
Only 1 left!

Martyr CMT-E00 is a zinc pencil anode sized 1/8" NPT x 1/4" x 2", designed to help protect marine engine cooling passages, heat exchangers, oil coo...

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$25.42 - $25.42
$25.42
$25.42 - $25.42
$25.42

Zinc Pencil Anode 1/8" NPT x 1/4" x 2" – CMT-E00

$9.37 - $9.37
$9.37
$9.37 - $9.37
$9.37
41 in stock

Martyr CMT-E00 is a zinc pencil anode sized 1/8" NPT x 1/4" x 2", designed to help protect marine engine cooling passages, heat exchangers,...

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$9.37 - $9.37
$9.37
$9.37 - $9.37
$9.37

Zinc Pencil Anode 3/4" NPT x 3/4" x 3-3/8" – CMT-E4

$28.84 - $28.84
$28.84
$28.84 - $28.84
$28.84
6 in stock

Martyr CMT-E4 is a zinc pencil anode sized 3/4" NPT x 3/4" x 3-3/8", used to help protect marine engine cooling passages, heat exchangers, oil cool...

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$28.84 - $28.84
$28.84
$28.84 - $28.84
$28.84

Zinc Pencil Anode 3/8" NPT x 1/2" x 1" – CMT-E1G

$11.37 - $11.37
$11.37
$11.37 - $11.37
$11.37
59 in stock

Martyr Zinc Pencil Anode 3/8" NPT × 1/2" × 1" – CMT-E1GShort-body sacrificial zinc pencil anode for engine cooling systems, heat exchangers, and ra...

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$11.37 - $11.37
$11.37
$11.37 - $11.37
$11.37

Zinc Pencil Anode 3/8" NPT x 1/2" x 2" – CMT-E1

$11.56 - $11.56
$11.56
$11.56 - $11.56
$11.56
23 in stock

Martyr CMT-E1 is a zinc pencil anode sized 3/8" NPT x 1/2" x 2", used to help protect marine engine cooling passages, heat exchangers, and related ...

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$11.56 - $11.56
$11.56
$11.56 - $11.56
$11.56

Zinc Plate Anode 3/4" x 6" x 12" – CMT-P075612Z

$151.27 - $151.27
$151.27
$151.27 - $151.27
$151.27
8 in stock

Martyr CMT-P075612Z is a zinc plate anode measuring 3/4" x 6" x 12", built for sacrificial corrosion protection on properly bonded metal surfaces i...

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$151.27 - $151.27
$151.27
$151.27 - $151.27
$151.27

Zinc Propeller Nut Assembly A 1/2"-NC13 – CMT-PNAZC13

$47.09 - $47.09
$47.09
$47.09 - $47.09
$47.09
6 in stock

Martyr CMT-PNAZC13 is a zinc propeller nut assembly designed for shaft-driven propeller applications using a 1/2"-13 NC thread. This complete zinc/...

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$47.09 - $47.09
$47.09
$47.09 - $47.09
$47.09

Zinc Propeller Nut Anode A – CMT-PNZA

$12.51 - $12.51
$12.51
$12.51 - $12.51
$12.51
9 in stock

The Martyr CMT-PNZA is a zinc replacement propeller nut anode in the A-style pattern, designed to help protect propeller shafts and propellers from...

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$12.51 - $12.51
$12.51
$12.51 - $12.51
$12.51

Zinc Propeller Nut Anode B – CMT-PNZB

$17.84 - $17.84
$17.84
$17.84 - $17.84
$17.84
21 in stock

The Martyr CMT-PNZB is a zinc replacement propeller nut anode in the B-style pattern, designed to help protect propeller shafts and propellers from...

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$17.84 - $17.84
$17.84
$17.84 - $17.84
$17.84

Zinc Propeller Nut C Replacement – CMT-PNZC

$25.48 - $25.48
$25.48
$25.48 - $25.48
$25.48
7 in stock

The Martyr CMT-PNZC is a zinc replacement propeller nut anode in the C-style pattern, designed to help protect propeller shafts and propellers from...

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$25.48 - $25.48
$25.48
$25.48 - $25.48
$25.48

Martyr Zinc Propeller Nut Replacement F Style CMT-PNZF

$37.39 - $37.39
$37.39
$37.39 - $37.39
$37.39
13 in stock

The Martyr CMT-PNZF is a zinc replacement propeller nut anode in the F-style pattern, designed to help protect propeller shafts and propellers from...

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$37.39 - $37.39
$37.39
$37.39 - $37.39
$37.39

Martyr Zinc Propeller Nut Anode H Style Replacement CMT-PNZH

$77.29 - $77.29
$77.29
$77.29 - $77.29
$77.29
7 in stock

Martyr zinc sacrificial propeller nut replacement anode (part #CMT-PNZH / PN-H-ZN), H-style pattern. Replacement anode only — not the complete prop...

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$77.29 - $77.29
$77.29
$77.29 - $77.29
$77.29

Martyr Zinc Thruster Body Anode Side-Power 71190A CMT-SGSL565Z

$13.19 - $13.19
$13.19
$13.19 - $13.19
$13.19
14 in stock

The Martyr CMT-SGSL565Z is a zinc thruster body anode for select Side-Power / Sleipner bow thruster applications. It cross-references to Side-Power...

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$13.19 - $13.19
$13.19
$13.19 - $13.19
$13.19

Martyr Zinc Thruster Propeller Anode Side-Power 201180 CMT-SGSP626Z

$22.09 - $22.09
$22.09
$22.09 - $22.09
$22.09
18 in stock

The Martyr CMT-SGSP626Z is a zinc thruster propeller anode for select Side-Power / Sleipner thruster applications. It cross-references to Side-Powe...

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$22.09 - $22.09
$22.09
$22.09 - $22.09
$22.09

Martyr Zinc Streamlined Shaft Anode 1in 25mm CMT-X03

$19.71 - $19.71
$19.71
$19.71 - $19.71
$19.71
84 in stock

Martyr zinc streamlined shaft anode (part #CMT-X03) for 1" (25mm) propeller shafts. Split clamp-on design with streamlined profile to minimize drag...

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$19.71 - $19.71
$19.71
$19.71 - $19.71
$19.71

Martyr Zinc Streamlined Shaft Anode 1-1/4in 32mm CMT-X05

$27.59 - $27.59
$27.59
$27.59 - $27.59
$27.59
45 in stock

Martyr zinc streamlined shaft anode (part #CMT-X05) for 1-1/4" (32mm) propeller shafts. Split clamp-on design with streamlined profile to minimize ...

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$27.59 - $27.59
$27.59
$27.59 - $27.59
$27.59

Martyr Zinc Streamlined Shaft Anode 1-1/8in 29mm CMT-X04

$23.08 - $23.08
$23.08
$23.08 - $23.08
$23.08
30 in stock

Martyr zinc streamlined shaft anode (part #CMT-X04) for 1-1/8" (29mm) propeller shafts. Split clamp-on design with streamlined profile to minimize ...

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$23.08 - $23.08
$23.08
$23.08 - $23.08
$23.08

Martyr Zinc Streamlined Shaft Anode 1-3/4in 44mm CMT-X08

$44.44 - $44.44
$44.44
$44.44 - $44.44
$44.44
56 in stock

Martyr zinc streamlined shaft anode (part #CMT-X08) for 1-3/4" (44mm) propeller shafts. Split clamp-on design with streamlined profile to minimize ...

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$44.44 - $44.44
$44.44
$44.44 - $44.44
$44.44

Martyr Zinc Streamlined Shaft Anode 1-3/8in 35mm CMT-X06

$27.54 - $27.54
$27.54
$27.54 - $27.54
$27.54
8 in stock

Martyr zinc streamlined shaft anode (part #CMT-X06) for 1-3/8" (35mm) propeller shafts. Split clamp-on design with streamlined profile to minimize ...

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$27.54 - $27.54
$27.54
$27.54 - $27.54
$27.54

Martyr Zinc Streamlined Shaft Anode 2-1/2in 64mm CMT-X11

$91.77 - $91.77
$91.77
$91.77 - $91.77
$91.77
31 in stock

Martyr zinc streamlined shaft anode (part #CMT-X11) for 2-1/2" (64mm) propeller shafts. Split clamp-on design with streamlined profile to minimize ...

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$91.77 - $91.77
$91.77
$91.77 - $91.77
$91.77

Martyr Zinc Streamlined Shaft Anode 2-1/4in 57mm CMT-X10

$98.06 - $98.06
$98.06
$98.06 - $98.06
$98.06
37 in stock

Martyr zinc streamlined shaft anode (part #CMT-X10) for 2-1/4" (57mm) propeller shafts. Split clamp-on design with streamlined profile to minimize ...

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$98.06 - $98.06
$98.06
$98.06 - $98.06
$98.06

Martyr Zinc Streamlined Shaft Anode 2-3/4in 70mm CMT-X12

$129.51 - $129.51
$129.51
$129.51 - $129.51
$129.51
18 in stock

Martyr zinc streamlined shaft anode (part #CMT-X12) for 2-3/4" (70mm) propeller shafts. Split clamp-on design with streamlined profile to minimize ...

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$129.51 - $129.51
$129.51
$129.51 - $129.51
$129.51

Martyr Zinc Streamlined Shaft Anode 25mm CMT-X25

$22.29 - $22.29
$22.29
$22.29 - $22.29
$22.29
16 in stock

Martyr zinc streamlined shaft anode (part #CMT-X25) for 25mm propeller shafts. Split clamp-on design with streamlined profile to minimize drag comp...

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$22.29 - $22.29
$22.29
$22.29 - $22.29
$22.29

Martyr Zinc Streamlined Shaft Anode 3in 76mm CMT-X13

$111.57 - $111.57
$111.57
$111.57 - $111.57
$111.57
21 in stock

Martyr zinc streamlined shaft anode (part #CMT-X13) for 3" (76mm) propeller shafts. Split clamp-on design with streamlined profile to minimize drag...

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$111.57 - $111.57
$111.57
$111.57 - $111.57
$111.57

Martyr Zinc Streamlined Shaft Anode 3-1/2in 89mm CMT-X15

$154.29 - $154.29
$154.29
$154.29 - $154.29
$154.29
13 in stock

Martyr zinc streamlined shaft anode (part #CMT-X15) for 3-1/2" (89mm) propeller shafts. Split clamp-on design with streamlined profile to minimize ...

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$154.29 - $154.29
$154.29
$154.29 - $154.29
$154.29

Martyr Zinc Streamlined Shaft Anode 3/4in 19mm CMT-X01

$20.31 - $20.31
$20.31
$20.31 - $20.31
$20.31
21 in stock

Martyr zinc streamlined shaft anode (part #CMT-X01) for 3/4" (19mm) propeller shafts. Split clamp-on design with streamlined profile to minimize dr...

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$20.31 - $20.31
$20.31
$20.31 - $20.31
$20.31

Martyr Zinc Streamlined Shaft Anode 30mm CMT-X30

$26.72 - $26.72
$26.72
$26.72 - $26.72
$26.72
12 in stock

Martyr zinc streamlined shaft anode (part #CMT-X30) for 30mm propeller shafts. Split clamp-on design with streamlined profile to minimize drag comp...

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$26.72 - $26.72
$26.72
$26.72 - $26.72
$26.72

Martyr Zinc Streamlined Shaft Anode 40mm CMT-X40

$51.47 - $51.47
$51.47
$51.47 - $51.47
$51.47
6 in stock

Martyr zinc streamlined shaft anode (part #CMT-X40) for 40mm propeller shafts. Split clamp-on design with streamlined profile to minimize drag comp...

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$51.47 - $51.47
$51.47
$51.47 - $51.47
$51.47

Martyr Zinc Streamlined Shaft Anode 50mm CMT-X50

$51.57 - $51.57
$51.57
$51.57 - $51.57
$51.57
7 in stock

Martyr zinc streamlined shaft anode (part #CMT-X50) for 50mm propeller shafts. Split clamp-on design with streamlined profile to minimize drag comp...

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$51.57 - $51.57
$51.57
$51.57 - $51.57
$51.57

Martyr Zinc Streamlined Shaft Anode 60mm CMT-X60

$114.73 - $114.73
$114.73
$114.73 - $114.73
$114.73
Only 3 left!

Martyr zinc streamlined shaft anode (part #CMT-X60) for 60mm propeller shafts. Split clamp-on design with streamlined profile to minimize drag comp...

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$114.73 - $114.73
$114.73
$114.73 - $114.73
$114.73
Sold out

Martyr Zinc Teardrop Hull Anode 3-1/2x1-3/4in CMT-T20

$10.60 - $10.60
$10.60
$10.60 - $10.60
$10.60
Out of stock

Martyr zinc teardrop hull anode (part #CMT-T20), 3-1/2" × 1-3/4". Universal sacrificial zinc anode for keel, hull, or flat surface mounting on stee...

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$10.60 - $10.60
$10.60
$10.60 - $10.60
$10.60
Sold out

Martyr Zinc Teardrop Hull Anode 5-1/4x2in CMT-T21

$16.99 - $16.99
$16.99
$16.99 - $16.99
$16.99
7 in stock

Thought for 30s Product TitleMartyr – Zinc Teardrop Hull Anode 5-1/4 x 2 in – CMT-T21 Product DescriptionThe Martyr CMT-T21 is a zinc teardr...

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$16.99 - $16.99
$16.99
$16.99 - $16.99
$16.99

Martyr Zinc Teardrop Hull Anode Aluminum Strap 9x3in CMT-ZTSAZ

$63.23 - $63.23
$63.23
$63.23 - $63.23
$63.23
34 in stock

The Martyr CMT-ZTSAZ is a zinc teardrop hull anode with an aluminum strap for weld-on hull protection. Current Martyr and retailer references descr...

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$63.23 - $63.23
$63.23
$63.23 - $63.23
$63.23

Martyr Zinc Skeg Trim Tab Anode Yamaha 225-300HP CMT-61A4537100Z

$59.59 - $59.59
$59.59
$59.59 - $59.59
$59.59
16 in stock

The Martyr CMT-61A4537100Z is a zinc skeg / trim tab anode for select Yamaha outboards. It cross-references to Yamaha 61A-45371-00-00 and is design...

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$59.59 - $59.59
$59.59
$59.59 - $59.59
$59.59
Sold out

Mercury MerCruiser OEM Aluminum Anti-Vent Plate Flat Anode 76214T5

$52.30 - $52.30
$52.30
$52.30 - $52.30
$52.30
Out of stock

The 76214T5 is a genuine Mercury MerCruiser Quicksilver aluminum anode plate designed to fit into the anti-ventilation plate trim tab anode cavity ...

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$52.30 - $52.30
$52.30
$52.30 - $52.30
$52.30
Sold out

Mercury MerCruiser OEM Zinc Anode Assembly Bravo Series 806188A1

$31.20 - $31.20
$31.20
$31.20 - $31.20
$31.20
Only 1 left!

The 806188A1 is a genuine Mercury MerCruiser Quicksilver zinc anode assembly / kit. Current Mercury parts references show 806188A1 as an OEM anode ...

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$31.20 - $31.20
$31.20
$31.20 - $31.20
$31.20

Mercury OEM Aluminum Power Trim Anode Kit V6 OptiMax 818298T1

$44.43 - $44.43
$44.43
$44.43 - $44.43
$44.43
Only 1 left!

The 818298T1 is a genuine Mercury MerCruiser Quicksilver aluminum anode kit designed to protect the bottom of the power trim pump assembly from gal...

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$44.43 - $44.43
$44.43
$44.43 - $44.43
$44.43
Sold out

Mercury MerCruiser \ OEM Aluminum Prop Nut Anode Kit Bravo III \ 865182Q01

$40.24 - $40.24
$40.24
$40.24 - $40.24
$40.24
Out of stock

The 865182Q01 is a genuine Mercury MerCruiser Quicksilver aluminum prop nut anode kit for Bravo III sterndrives. Mercury identifies it as the prop ...

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$40.24 - $40.24
$40.24
$40.24 - $40.24
$40.24
Sold out

Mercury MerCruiser Quicksilver Aluminum Anode Kit Bravo One 888758Q02

$179.03 - $179.03
$179.03
$179.03 - $179.03
$179.03
Only 1 left!

The 888758Q02 is a genuine Quicksilver aluminum anode kit for MerCruiser Bravo One sterndrives. Mercury’s official product listing identifies it as...

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$179.03 - $179.03
$179.03
$179.03 - $179.03
$179.03

Mercury OEM Aluminum Anti-Vent Plate Anode V6 V8 V10 8M0137814 (Pack of 2)

$39.96 - $39.96
$39.96
$39.96 - $39.96
$39.96
Only 2 left!

The Mercury 8M0137814 is a genuine OEM aluminum anti-vent plate anode for select Mercury outboard applications. Mercury’s current product reference...

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$39.96 - $39.96
$39.96
$39.96 - $39.96
$39.96
Sold out

Zinc Transom Bracket Anode Yamaha V4 V6 2-Stroke 6G5-45251-02-00

$49.60 - $49.60
$49.60
$49.60 - $49.60
$49.60
Out of stock

The Yamaha 6G5-45251-02-00 is a genuine OEM transom bracket anode for select Yamaha outboard applications. It is designed to help protect the outbo...

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$49.60 - $49.60
$49.60
$49.60 - $49.60
$49.60
Sold out