Materials and Construction
Lead is

Not used as pigment (in its compound forms) for paints
Not resistant to corrosion
Used as a cathodic material
Used as a shock absorber (in mattress form) between the foundation an steel framework of skyscrapper buildings

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Materials and Construction
Aluminium alloy is one of the most suitable materials of construction for aircrafts mainly due to its

High strength to weight ratio
Low temperature strength properties
Its ability to be cast, rolled, forged & stamped
High strength and corrosion & oxidation-resistance at elevated temperature

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