Российский химико-технологический университет им. Д. И. Менделеева, Москва, Россия:

С. Е. Золотухин, доцент кафедры общей химической технологии, канд. техн. наук, эл. почта: zolotukhin.s.e@muctr.ru
А. Ю. Курбатов, доцент кафедры инновационных материалов и защиты от коррозии, канд. техн. наук, эл. почта: kurbatov.a.i@muctr.ru
В. Н. Грунский, профессор кафедры общей химической технологии, докт. техн. наук
Ю. М. Аверина, доцент кафедры инновационных материалов и защиты от коррозии, канд. техн. наук

Проведено изучение коррозионной стойкости стали и сплавов на основе никеля в среде горячей серной кислоты в условиях, симулирующих процесс отвода теплоты абсорбции триоксида серы серной кислотой. Доказано, что дополнительное введение соединений кремния в состав аустенитных сталей позволяет значительно повысить коррозионную стойкость стали в первую очередь за счет образования аустенито-феритных структур. Положительное влияние соединений кремния отмечено для всех диапазонов исследуемых параметров. Аналогичный эффект дают добавки меди, молибдена и марганца. Влияние добавки кремния для никелевых сплавов наиболее заметно при использовании материала в зоне высоких температур и концентраций серной кислоты. При этом показатели общей скорости коррозии как для сплавов, так и для аустенитных сталей достаточно близки, что позволило сделать вывод о нецелесообразности применения более дорогостоящих никельсодержащих сплавов. Полученные в результате эксперимента данные по скорости коррозии различных материалов могут быть использованы непосредственно на производстве для расчета продолжительности эксплуатации оборудования и своевременного вывода оборудования для ремонта или технического обслуживания.

Исследования проведены с использованием оборудования Центра коллективного пользования имени Д. И. Менделеева в рамках проекта № 075-15-2021-688.

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