MG Duff Zinc Hull Anode — 4.0 kg
Sacrificial zinc hull anode, 4.0 kg net. Bolt-on protection for hull, stern gear and bonded fittings. For salt water.
- Genuine MG Duff, cast and alloy-tested in the UK
- In stock in Thailand, dispatched in 1–2 working days
- 30-day returns on unused items — how returns work
- Not sure which pattern? LINE or WhatsApp us a photo of the old anode
Delivery & shipping
- Free local delivery — Trang · Krabi · Phuket
- Thailand-wide courier, typically 1–3 days
- Worldwide shipping by courier & sea freight
Fair price check
Our price is the manufacturer's home-market RRP — what this gear sells for where it's made. Branded marine equipment in Thailand typically retails 15–90% above that, when prices are published at all. Ours doesn't.
About this product
Sacrificial hull anodes protect your hull, stern gear and every bonded underwater fitting by corroding first — the anode is consumed instead of your boat. This 4.0 kg zinc anode bolts to the hull and connects to the internal bonding circuit; anode quantity and placement depend on wetted surface area, so ask us if you’re sizing a scheme from scratch.
Specifications
| Material | Zinc |
| Water type | Salt water only (zinc passivates in brackish/fresh) |
| Alloy standard | US MIL-A-18001K |
| Net weight | 4.0 kg |
| Fixing | Bolt-on, twin studs (backing pads & fixing kits available) |
Fit and dimensions
| Overall length | 305mm |
| Anode body length | 305mm |
| Width | 76mm |
| Depth / thickness | 32mm |
| Stud size | M10 |
| Fixing holes | 2 |
| Fixing hole | 19mm x 11mm fixing holes at 200mm hole centres |
| Gross weight | 4.0 kg |
MG Duff has been the UK’s leading name in marine cathodic protection since 1956, casting anodes at its own Chichester foundry with every melt batch-tested for alloy composition. Their zinc alloy meets US military specification MIL-A-18001K.
Inspect anodes at least annually and replace once 50% consumed. Never paint or antifoul an anode — coatings stop it working. Correct electrical bonding is essential; ask us if you are unsure about your bonding circuit. FREE delivery to Trang, Krabi & Phuket on our weekly courier run; free standard delivery across Thailand on orders over $250 (parcels to 10 kg).
Zinc or aluminium, and how many?
Zinc for clean salt water; aluminium where the boat sits in brackish estuary marinas or moves between fresh and salt, because zinc can go passive there. The boat anode selector gives you a pattern and quantity for your boat in about a minute, and the guide zinc vs aluminium anodes in Thai waters explains why. Replace anodes when about half is gone, and replace them as a set.
Questions
Can I mix zinc and aluminium on one boat?
Keep one alloy across the bonded system so every anode wastes at the same rate; mixing is for separate, unbonded fittings only. Ask us if you are unsure.
Is it in stock?
Yes, in stock in Thailand and dispatched within 1–2 working days.
Returns and warranty
Unused anodes can be returned within 30 days; full details on the returns page. Genuine MG Duff, batch-tested at the foundry.
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