Seachoice Hull Plate Anode – 12" × 5" × ½", Magnesium | Freshwater
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Seachoice Hull Plate Anode – 12" × 5" × ½", Magnesium | Freshwater
The Seachoice Hull Plate Anode is a large flat sacrificial anode designed to mount directly to the hull of a vessel for broad galvanic corrosion protection in freshwater environments. At 12" × 5" × ½", it provides substantial anode mass for extended protection between replacements — making it well suited to larger vessels, steel or aluminum hulls, and any application where maximum hull coverage is needed.
Magnesium is the correct anode material for freshwater use — it is more electrochemically active than aluminum or zinc in low-conductivity freshwater, providing effective galvanic protection where other anode materials may be too passive. All mounting hardware is included for a straightforward installation.
Key Features
- Large 12" × 5" × ½" plate profile for broad hull coverage and extended service life
- Magnesium construction — correct material for freshwater use
- Cadmium-free formulation — higher galvanic protection than zinc
- 2.5x lighter than zinc for reduced hull weight
- Ideal for aluminum hulls and steel hulls in freshwater
- All mounting hardware included
Compatible Applications
- Steel and aluminum-hulled vessels in freshwater lakes and rivers
- Larger inboard and shaft-drive vessels requiring broad hull anode coverage
- Houseboats, pontoon boats, and commercial vessels in freshwater
- Any freshwater vessel where hull plate corrosion protection is needed
Parts Desk Insights
The Seachoice Hull Plate Anode is best suited for freshwater vessel owners — particularly those with steel or aluminum hulls — who need a large, flat anode that mounts directly to the hull for broad galvanic protection. The 12" × 5" size provides significantly more anode mass than a shaft or drive anode, making it the right choice for larger vessels or installations where a single anode needs to cover a wide area of hull. Magnesium is essential for freshwater use; aluminum or zinc anodes in freshwater may not corrode fast enough to provide adequate protection. For a saltwater hull plate anode, see the Seachoice Hull Plate Anode Z406. For shaft anodes, see the Seachoice Streamlined Shaft Anode – 2" (Model X9), Magnesium, 1¼" (Model X5), and 1½" (Model X7).
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.