Princess 30DS – Electrolysis / Galvanic Action
We undertook a Pre Purchase Inspection (PPI) on this Princess motor boat and found a most unusual phenomena in so far as the antifoul paint had been stripped clean in the areas immediately surrounding all underwater bronze skin fittings
The bottom had been antifouled blue on top of a copper undercoat, which undercoating had not been left clear of all underwater appendages such a skin fittings, rudder stocks, P brackets etc.
It is our opinion that an electrolytic current has been set up within the copper based undercoat and the bronze skin fittings, the consequence of which a ‘reaction’ has stripped off the blue antifoul paint within the immediate vicinity of bronze skin fittings.
When the copper undercoat was applied it is necessary to leave a clean (unpainted) radius of approximately 2″-3″ around ALL bronze skin fittings
The owner of this Princess is very fortunate not to have had his props, rudder, P brackets etc attacked and destroyed by electrolysis / galvanic action
For more information on electrolysis & galvanic activity visit (search) our earlier blogs entitled……
* Anodes for Boats – A Clear and Simple Resume PLUS:
* Searay 290 This blog / post details how a boat sank consequent of electrolysis
For more information contact European Marine Services Ltd. Marine Surveyors & Consultants
EMS also undertake Boat Safety Inspections & Engine Inspections
Tel: 01603 327 123
For more information contact European Marine Services Ltd (inc European Marine Surveys)
Tel : 01603 327 123 www.europeanmarinesurveys.com