Electrolysis Damaged Prop

Electrolysis Damaged Prop

Severe damage due to stray current or inadequate zinc anode installation.

Pitted Prop Shaft

Pitted Prop Shaft

This sort of pitting can result in shaft failure

Electrolysis Damaged Prop

Electrolysis Damaged Prop

Prop ruined due to lack of zinc anodes on shaft.

Rudder With Broken Welds

Rudder With Broken Welds

Sea water got into the rudder, the Tang welds rusted and broke during a Gulf crossing causing the rudder shaft to spin inside the rudder, with resulting loss of steering.

Crevice Corrosion

Crevice Corrosion

Chainplates often have this sort of corrosion where they pass through the deck and seawater has leaked and saturated the deck core.

Rusted Sailboat Hull

Rusted Sailboat Hull

This damage was concealed by exterior paint. Rusted from inside the boat from leaking chain locker.

Crevice Corrosion On Chainplate

Crevice Corrosion On Chainplate

Chainplate ruined due to poor bedding allowing water saturate the bulkhead it is bolted to.

Broken Off Keel

Broken Off Keel

This keel broke off a sailboat crossing the Gulf, causing loss of life when the boat capsized due to loss of ballast.

Rusted I-Beam Mast Step

Rusted I-Beam Mast Step

Many sailboats have steel mast steps that do not stand the test of time. Seawater rusts them, causing lack of support for the mast.

Corroded Pod Drive

Corroded Pod Drive

Dissimilar metal corrosion most likely caused by poor anodic protection.

Cracked Iron Keel

Cracked Iron Keel

Rusted Water Heater Bottom

Rusted Water Heater Bottom

Seawater under the water heater rusted the bottom of the case.

Crevice Corrosion

Crevice Corrosion

Bolt ruined by crevice corrosion. Stainless steel is subject to this damage when immersed in seawater. Lack of oxygen facilitates the action of chlorides to infiltrate the metal.

Prop Shaft Corrosion

Prop Shaft Corrosion

Corrosion under the propeller possibly caused by stray current in the water around the boat.

Cracked Inboard Engine Manifolds

Cracked Inboard Engine Manifolds

These engine manifolds cracked when the water inside them froze and expanded.

Crevice Corrosion

Crevice Corrosion

Sailboat rigging toggle ruined by crevice corrosion.

Trailerable Boats

Trailerable Boats

Transoms of outboard boats can be damaged by water infiltration from cracks, unsealed screw holes or unsealed motor mount bolt holes.

Moisture Meter On Transom

Moisture Meter On Transom

Moisture meters help to detect water infiltration in transoms, decks, bulkheads, and hull cores

Wrapped Line

Wrapped Line

Out of water inspection is mandatory when purchasing a boat.

Percussion Sounding

Percussion Sounding

Percussion sounding of hulls will sometimes reveal damage.

Rusted Boat Trailer Brake Line

Rusted Boat Trailer Brake Line

Boat trailer components are adversely affected by salt water.

Broken Keel Bolt

Broken Keel Bolt

Rust, crevice corrosion and electrolysis cause havoc with metals immersed in seawater.

Rusted Brake Rotor

Rusted Brake Rotor

Many boat trailers used around salt water have brake components made inoperable by salt water.

Rotted Mast Step

Rotted Mast Step

This mast step was assumed to be solid fiberglass, but was rotted wood covered by fiberglass.

Rotted Mast Step

Rotted Mast Step

Inside the ruined mast step.

 

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