Boat Corrosion

Corrosion in boats is a major problem for many owners – metal and water are generally NOT the best of friends!!!

There are 3 particular areas of corrosion control where Hamble Marine can help:

  • Corrosion inside the engine (diesel or petrol) made worse by sea water
  • Galvanic corrosion caused by two (or more) different metals connected together
  • Galvanic corrosion intensified by the use of Shore Power

Corrosion inside the engine The range of products from SuperFlush is the ultimate weapon against salt water corrosion in marine engines.

   * SuperFlush permanently fitted units blast salt water out of your engine after each use

   * Eradicates salt build up and allows engines to run cooler

See our SuperFlush page for more details.

Galvanic Corrosion caused by two different metals One of nature’s phenomena is the fact that two different metals when connected together and immersed in an electrolyte develop an electrical current that results in the loss of the most active metal.  The electrolyte in our case is the water the boat is used in, either fresh water or sea water.  For example, a typical boat might have skin fittings of brass, a stainless steel prop shaft and aluminium propeller.

The usual solution is to fit “sacrificial anodes” of either magnesium, zinc or aluminium.  We can supply a wide range of anodes to suit most purposes.

Galvanic Corrosion intensified by the use of Shore Power Using “Shore Power” introduces a whole new range of problems because your boat is now connected to all the other nearby boats by a piece of wire which can cause even more havoc!

The usual solution is either to use an “Isolation Transformer” or to fit a “Galvanic Isolator”.  We can supply a range of Galvanic Isolators suitable for most boats.

Confused???? – Then why not let an engineer from Hamble Marine come and carry out a full “Corrosion Survey Report” on your boat?  We have the very latest state-of-the-art Test Equipment and can carry out a full survey and can measure whether or not your boat metal is eroding or being protected, without the guesswork.

We will issue you with a full, written survey report listing any remedial work required.

If everything is satisfactory, you will have peace of mind and if there is a problem, we will be able to identify it and suggest what corrective action needs to be taken.

The cost of the report varies according to the complexity of the boat’s electrical system and how easy access is to all the metal parts in contact with the water but is typically £40 to £50.

Use the email form on the “Contact Us” page or phone during our office hours on 023 8000 1088.

We can arrange the Survey and fit any Anodes or Galvanic Isolators that might be required anywhere in the Portsmouth/River Hamble/Southampton area.