Example issues

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This is a great example of poultice corrosion on a nine year old keel stepped mast.  Salt water has remained in contact with the mast at the partners and has gradually corroded the aluminium alloy.  

 Blisters can be seen on this 1980's GRP hull.  These are at a fairly early stage, however they will get progressively worse until corrective action is taken. 

 If you have rust patches on your iron keel,   you are not alone!  This example is from a   high quality 48 foot yacht which is only 3 years old. 

Although a small item, the missing split pins on this shroud bottle screw could could result in mast failure.

 Another example, where scraping of the antifouling has revealed blisters in the gelcoat.  This particular boat had very high moisture levels and so blustering was to be expected. 

This demonstrates the need to maintain the watertight integrity of cored structures.  In this case, the seal at the top of the hull at the deck joint was not sound, allowing water to penetrate down to the waterline as shown.

 This is a great example of dezincification in a bronze alloy folding prop.  The zinc has wasted out of the alloy, leaving a weak, brittle material. In this case, the splines which lock the blades together as they open have worn away.  This is the result of anodes not being replaced frequently enough. 

  The trailing edge of this GRP rudder has debonded, allowing water to penetrate the structure.  

 This is the under-deck fixing of a pad eye.  The bedding compound has failed, allowing salt water to drip down the bolts, resulting in corrosion of the stainless steel.