Formic Acid
More corrosive than acetic acid, formic acid is used in the production of pharmaceuticals, dyes and artificial flavors.  The leather, textile, rubber and pulp and paper industries also use formic acid in their process.
Corrosion Resistance of Zirconium in Formic Acid
Media Concentration (%) Temperature (ºF) Corrosion Rate (mpy)
Formic Acid 10 - 98 35 - boiling < 1
Formic Acid (aerated) 10 - 90 Room - 100 < 1
Formic Acid + 5% H2SO4 50, 70, 93 Boiling < 1
Formic Acid + 5% HCl 50, 70, 85 Boiling < 1
Formic Acid + 1% CuCl2 50, 70, 95 Boiling < 1
Formic Acid
+ 1% iron powder
50, 70, 98 Boiling < 1
Formic Acid + 5% HI 50, 70, 90 Boiling < 1
Formic Acid + 2% H2O2 50 80 < 1
Formic Acid + 4% H2O2 50 80 < 1
View table of Corrosion Resistance of Zirconium in Various Other Media

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