Does nitric acid diffusion into Polyvinylidene Fluoride affect the mechanical properties of the plastic?
1) Is Polyvinylidene Fluoride chemically compatible with Nitric acid 45 % at 70 C?
2) And, will it diffuse and affect its mechanical properties?
The book Chemical Resistance, Volume 1 - Thermoplastics, Second Edition says that PVDF exposed to 45% nitric acid at elevated temperature has a resistance of 8. That means 90-94% retention of mechanical properties and no substantial change in dimensions or appearance. They define elevated temperature as tests done at 45°C and above.
Chris DeArmitt PhD FRSC
President
Plastic materials consultant to the Fortune 100
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