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Corrosion Resistance of Titanium to Acetic Acid

The commercially pure titanium (unalloyed titanium) ASTM grades 1 to 4 can be used for applications involving acetic acid, or acetic acid combined with acetic anhydride, chlorine ion, or formic acid. The corrosion data for grade 1, grade 2, grade 3 and grade 4 titanium in various acetic acid solutions are presented in below table.

MediumConcentration, %Temperature, °CCorrosion Rate, mm/yr
Acetic Acid5~99.7124nil
Acetic Acid33~vaporboilingnil
Acetic Acid99boiling0.003
Acetic Acid651210.003
Acetic Acid581300.381
Acetic Acid99.71240.003
Acetic Acid +
3% acetic anhydride
Glacial2041.02
Acetic Acid +
1.5% acetic anhydride
Glacial2040.005
Acetic Acid +
109 ppm Cl-
31.2boiling0.259
Acetic Acid +
106 ppm Cl-
62.0boiling0.272
Acetic Acid +
5% formic acid
58boiling0.457
Acetic Anhydrite100210.025
Acetic Anhydrite1001500.005
Acetic Anhydrite99.5boiling0.013
*All values are based on engineering practices and lab tests and shall be used only as a guideline for titanium performance.
*The corrosion rate may vary depending on changes in medium chemistry, temperature, length of exposure, and other factors.

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