The corrosion rate of carbon steel varies at the same pH depending upon the acidic species present. A strong mineral acid (such as HCl) at pH of about 4.5 will corrode carbon steel at about a 5 mil per year rate at ambient temperature while a weak acid (such as carbonic acid) will corrode steel...
The selection of a suitable metal depends upon how much corrosion that you can accept. Hastelloy C-276 and Hastelloy B-4 will corrode up to 10 to 20 mills per year (mpy) under some conditions that you listed e.g 0-99 % and 20 to 80 degrees C. Other than glass and PTFE (Teflon), the only...
