Авторы:
Издательство:
Дата издания
21.05.2025Область исследования
Тип исследования
Аннотация (краткое описание)
The inhibitory properties of the product obtained from manganese ore sampled from Zhairem deposit were studied on low-carbon steel (St3) in an aqueous medium. Standard gravimetric method and electrochemical measurements were used. It is shown that calcium-manganese phosphate product with composition СаО:MnO:Р2О5 (1.00:0.11:1.54) and the phosphate content from phosphorus pentoxide (73.64±1.33, wt.%), reduces the corrosion rate of steel St3 in the entire studied concentration range from 1 to 100 mg/L of Р2О5. In contrast to the well-known sodium polyphosphate inhibitor, it has been established that anti-corrosion treatment of water with a calcium-manganese phosphate inhibitor reduces the rate of accumulation of salt rust deposited on the steel surface. This was obtained to be practically zero at a concentration of 50 mg/L of P2O5. The results of electrochemical tests were confirmed by noting and calculating polarization curves of gravimetric measurements. During the study of the surface morphology of steel samples after being exposed to inhibitor solutions using scanning electron microscopy (SEM) and energy-dispersive analysis, the formation of uniform coatings consisting of compounds of calcium, manganese, iron and phosphorus was established. IR spectroscopic studies confirmed the formation of a protective coating in calcium-manganese solutions consisting of calcium, iron, and possibly manganese hydrodiphosphates. © The Author(s) 2025.DOI
10.30919/ee1549Тип публикаций
Данный документ располагается в коллекциях
Международные публикации ученых SU
Scopus