Metal corrosion and its prevention are often considered black arts and yet knowledge of both are vital for the safety and integrity of a boat. Failure through corrosion or fatigue can result in masts falling down, keels falling off or boats quietly sinking at their moorings. Less dramatic are such problems as pitting or fracture of propeller shafts, erosion of pipe work, rusting of steel hulls and galvanic corrosion of aluminium ones. The second edition of this unique book is intended to be of use to boat owner and boat builder alike, giving advice on common problem areas such as keel bolts and propeller shafts. Engines, outdrives, copper sheathing and chromium plating are examined, and strategies are suggested for reducing or preventing corrosive effects.