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The most important technical challenges in the implementation of a successful composite patch repair are: (a) proper design of the repair patch and the procedures that will be followed, (b) selection of the most suitable materials and tools for the application, (c) careful surface preparation, (d) implementation of the composite patch repair ...
Ship's carpenter is a post aboard ships, both naval and commercial, responsible for the maintenance and repair of the ship's wooden parts, as well as its water stocks.. In the late 19th century, typical activities for a ship's carpenter included caulking the ship's boats, repairing masts and other wooden pieces of the ship, maintaining paddles, and other miscellaneous tasks of carpentry as may ...
Aluminum and aluminum alloys are used both in sheet form for all-metal hulls or for isolated structural members. Many sailing spars are frequently made of aluminium after 1960. It is the lightest material for building large boats (being 15–20% lighter than polyester and 30% lighter than steel).
A rail repair dutchman is typically a 4–6-inch (100–150 mm) long piece of rail that is cut in advance for the purpose and carried by a section crew. If the gang finds a rail with a chipped or broken end, they remove the connector plates ( fishplates ), cut out the damaged section, replace it with the dutchman, and bolt the connectors back ...
Massawa's first major surface fleet "customer" was HMS Dido, which needed repairs to a heavily damaged stern in mid-August 1942, the beginning of a repair and maintenance period for the war-weary 15th Cruiser Squadron. [12] Many of the harbor's sunken ships were patched by Ellsberg's divers, refloated, repaired and taken into service. [13]
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Pitting corrosion, or pitting, is a form of extremely localized corrosion that leads to the random creation of small holes in metal. The driving power for pitting corrosion is the depassivation of a small area, which becomes anodic (oxidation reaction) while an unknown but potentially vast area becomes cathodic (reduction reaction), leading to ...
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