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There are several tests for sulfate ion to identify from other anions in qualitative analysis. Some of metal sulfate compounds are soluble in water and some metal sulfates form precipitates. Sulfate compounds of several d block metal cations form colours.
1 Ιουν 2022 · The behavior of galvanized steel exposed to strong alkaline solutions (pH values of 12.7) with a fixed concentration of sulfate ions of 0.04 M is studied here.
30 Ιουν 2021 · The early presence of sulfate ions in a saturated calcium hydroxide solution was shown to affect the corrosion behavior of the steel. The higher sulfate ion concentrations resulted in the increase of the anodic current exchange density.
15 Αυγ 2023 · The electrochemical testing and material characterization of galvanized steel in alkaline sulfate solutions showed that the sulfate ions can adversely affect the barrier protection provided by the surface layers and promote prolonged corrosion activity.
Internal sources of sulphate to the steel occurs in a situation where the sulphate ions are incorporated in the mixing and the casting of the concrete either as hydraulic cement, aggregate or sulphate-contained admixtures or the use of sulphate dissolved water in the mixing, casting and curing of the reinforced concrete. External sulphate ...
22 Σεπ 2021 · General Instructions. For each anion you will perform a positive control test on 1 mL of solution of the anion, followed by a positive control experiment on 1 mL of a diluted solution of the anion. The diluted anion solutions can be prepare by adding 3 drops of deionized water to 9 drops of the anion solution.
21 Μαρ 2024 · In solutions containing SO42− and HCO3− in anaerobic environment, a high proportion of HCO3−/SO42− leads to the passivation of Q345 carbon steel sample as a result of the competitive adsorption of HCO3− on substrate surface with smaller radius.
