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2. Underwater cutting and welding - Wikipedia

   en.wikipedia.org/wiki/Underwater_cutting_and_welding

   Oxygen arc cutting and arc welding underwater requires greater skill and stamina than working in a dry and stable environment. The underwater environment imposes several limitations and restrictions on both the equipment and the operator, and the restriction of short bottom times at greater depths for surface-oriented divers makes efficient working important to getting the job done in a ...

3. Aluminium joining - Wikipedia

   en.wikipedia.org/wiki/Aluminium_joining

   Aluminium alloys are often used due to their high strength-to-weight ratio, corrosion resistance, low cost, high thermal and electrical conductivity.There are a variety of techniques to join aluminium including mechanical fasteners, welding, adhesive bonding, brazing, soldering and friction stir welding (FSW), etc. Various techniques are used based on the cost and strength required for the joint.

4. 5059 aluminium alloy - Wikipedia

   en.wikipedia.org/wiki/5059_aluminium_alloy

   5059 is often assembled using arc welding, typically MIG (for marine use) or TIG welding. The newer technique of Friction stir welding has also been successfully applied but is not in common use. [citation needed] Arc welding reduces mechanical properties to no worse than –O hardening condition.

5. Aluminium alloy - Wikipedia

   en.wikipedia.org/wiki/Aluminium_alloy

   These alloys are used for boat building and shipbuilding, and other marine and salt-water sensitive shore applications. [70] 5052 aluminium alloy; 5059 aluminium alloy; 5083 aluminium alloy; 5086 aluminium alloy; 6061 aluminium alloy; 6063 aluminium alloy; 4043, 5183, 6005A, 6082 also used in marine constructions and off shore applications.

6. Boat building - Wikipedia

   en.wikipedia.org/wiki/Boat_building

   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).

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