Materials and Construction
Corrosion resistance of steel is increased by the addition of

Nickel and chromium
Phosphorous and tungsten
Molybdenum and tungsten
Lead and vanadium

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

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

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