Materials and Construction
Out of the following, copper vessels are the most suitable for the storage of

Bromine
Dry chlorine & dry fluorine
Phosphoric acid (95%) & sulphuric acid (95% and fuming)
Nitric acid (95% and fuming)

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Materials and Construction
Hastelloy C is a good material of construction in chemical process industry, since it is

Highly corrosion resistant and is readily fabricated
Light and resists attack by acids
Relatively inexpensive although it can be fabricated with some difficulty
Corrosion resistant to most alkalis, particularly because of its coper content

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