Materials and Construction
Polythene (low or high density) containers are not corroded by

Sulphuric acid (10%) at room temperature
Nitric acid (95%) at room temperature
Any of these
Sulphur trioxide at 60°C

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

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

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