Materials and Construction
Wrought iron is

Malleable & ductile; and hence is used for chain links, hooks & couplings
An alloy of iron, chromium & carbon
Highly resistance to acid corrosion
High carbon iron

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

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