Why study iron ions in acidic water

Acidic water is corrosive to steel, and the corrosion level can be determined by checking the iron ion concentration in the water sample. Generally, it is necessary to control the iron ion concentration

Generally, acidic water samples are obtained through fractional absorption and stabilization. The purpose of this is to determine the pH value of the acidic water, as well as the concentration of iron ions. These two parameters indicate the degree of corrosion in pipelines and containers; a higher concentration of iron ions suggests severe corrosion on the walls of these pipelines, while the pH value shows whether the amount of corrosion inhibitor added is appropriate.

May I ask what the typical pH value of the acidic water into which the corrosion inhibitor is added should be?

We control it between 6.5 and 8.5

Monitor the corrosion of pipeline equipment! The higher the iron ion level, the more severe the corrosion will be!

We all know that when PH is 7, the solution is neutral. Personally, I think that in order to prevent acidic corrosion, it would be more appropriate for the PH to be higher than 7. The pH of the acidic water sample in our workshop is 7.2; a certain level of alkalinity is sufficient.

What people used to call \"acidic water\" was not necessarily acidic in reality; it is now generally referred to as sulfur-containing wastewater or tower top condensate. Depending on the device, the pH and ion content of acidic water vary. Generally, this is because corrosive ions such as HCl, H2S, HCN, and NH3, which are generated during the processing process, dissolve in water and cause corrosion to pipelines and equipment. Therefore, it is necessary to analyze and monitor water samples to assess the degree of corrosion; common analysis parameters include pH, Cl, H2S, Fe, etc. Adding a corrosion inhibitor is the most economical and simple method for preventing corrosion in such cases. As for the pH value of the water, it should be adjusted according to the specific acidity of the water; in distillation units, a pH range of 6.5 to 7.5 is generally appropriate. In units where water is acidic after secondary processing, a pH of 6.5 to 7.5 is suitable, while if the water is alkaline, the pH should be kept around 8. If the alkalinity is too high, it is better to add a corrosion inhibitor rather than raising the pH level.

Do you add neutralizing and corrosion-inhibiting agents? Our pH level is above 8.5