Sulfate Ion Content
Definition - What does Sulfate Ion Content mean?
Sulfate ion content is either the concentration or amount of sulfate ions in a solution.
When materials corrode in sulfuric acid media, it usually is due to higher concentrations of ions. Studies show that iron corrosion in sulfuric acid media having a pH close to 3.0 and having a higher concentration of ions can either accelerate or decelerate the rate of corrosion. Under cathodic control, sulfate ions accelerate the corrosion process.
Corrosionpedia explains Sulfate Ion Content
In one study, for the electrolytes, sodium sulfate solutions of 0.1M, 0.5M, 1M, 1.5M and 2M concentrations were prepared by dissolving the salt in doubled distilled water. In such cases, the pH of the electrolytic solution had to be adjusted to the desired pH values of 3, 5, 7, 9 or 12 for each sulfate concentration. This was achieved by adding sodium hydroxide and sulfuric acid. The pH value of the solution was measured using a calibrated pH meter. Once the setup was complete, corrosion tests were performed at various temperatures ranging from 30°C to 50°C (±0.5°C) by putting the corrosion cell in a calibrated thermostat. It was found that the sulfate ions accelerated the corrosion process when the reaction was under cathodic control.