Your browser version is not officially supported, and you may experience a degraded service. Please upgrade your browser.
We are still delivering orders and offering click and collect, please read our COVID-19 update for more information.
x

MG Duff MD78B Straight Magnesium Hull Anode for Fresh Waters (1.3kg)

Part No: 812117

MGDUFF MD78B straight shaped magnesium sacrificial hull anode, suitable for use in fresh waters. Sacrificial anodes should be fitted and correctly bonded to all boats / vessels to help prevent corrosion... Read more

Description

Description

MGDUFF MD78B straight shaped magnesium sacrificial hull anode, suitable for use in fresh waters. Sacrificial anodes should be fitted and correctly bonded to all boats / vessels to help prevent corrosion by cathodic protection when in the water.

Wooden hulled vessels operating in fresh water are subject to the same corrosion problems as GRP craft. However the fitting of magnesium anodes is NOT recommended as they will have a damaging effect on the timbers around the fixings known as electro-chemical decay. MGDUFF advise that the appropriate action is to fit a magnesium shaft collar on the exposed propeller shaft and if necessary to fit anodes directly to mild steel rudders and keels.

Cathodic protection is an electrochemical process which halts the natural reaction (corrosion) of metals in a particular environment by superimposing an electrochemical cell more powerful than the corrosion cell. Sacrificial anodes are fitted or bonded to the metal to be protected which in turn, as it has a greater electrical potential than the anode material, becomes cathodic and causes the anode to waste instead of itself.

All cathodic protection systems must be inspected annually and the sacrificial anodes renewed if more than 50% are wasted. You should check the working surface of the sacrificial anode to ensure that it is free of paint and chalky corrosion deposits. When fitting or replacing a sacrificial anode you should also replace the serrated fan disc washers under the nuts and change the anode backing sheet on wood and GRP hulls. Exposed fixing studs, nuts and washers should be well greased or painted after assembly.

MGDUFF Sacrificial Magnesium Hull Anode

- MG DUFF Part Number: MD78B

- Construction: Magnesium

- Nominal Weight: 1.3kg

- Fixing Type: Bolt on

- Bolt Size: 10mm (M10)

- Bolt Centres: 200mm (8")

- Overall Length: 305mm

- Overall Width: 76mm

- Overall Height: 32mm

Specifications
Height 32mm (1-1/4")
Length 305mm
Width 76mm (3")
Brand MG Duff
Hole Centres 200mm (8")
Backing Pad 812917
Construction Magnesium
Fixing Bolt on, 10mm bolt (M10)
Model MD78B
Nominal Weight kg [Anode Hull] 1.3
Style Description Straight Anode
Ask a Question
MG Duff MD78B Straight Magnesium Hull Anode for Fresh Waters (1.3kg)

£55.92

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

£55.92 Incl VAT

 8 in stock

View Trade Prices
Check stock in store
Beccles

8 in stock

Hamble

0 in stock

 Please check with the store before travelling to avoid disappointment

Quantity

Get offers in your inbox

Sign up for the latest offers, product news, technical advice and more.

By submitting your details you consent to our Privacy Policy.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.