Chromic acid is the aqueous solution of chromium trioxide (chromic anhydride) simply attained by dissolving CrO₃ into water. The unalloyed titanium of ASTM grade 1, 2, 3, 4, 7, 16 can be used for applications involving chromic acid over a wide range of concentrations and temperatures. The corrosion data is shown in below table.

Concentration of CrO3	Temperature		Corrosion Rate
%	°C	°F	mm/yr	mils/yr
10	boiling	boiling	0.003	0.12
15	24	75	0.005	0.2
15	82	180	0.015	0.6
36.5	90	195	0.046	1.8
50	24	75	0.013	0.5
50	82	180	0.025	1.0

*The tabulated values are based on engineering practices or laboratory tests.