Actual Problems in Machine Building 2016 No. 3

Актуальные проблемы в машиностроении. 2016. №3 Инновационные технологии в машиностроении ____________________________________________________________________ 133 17. Фрейман Л.И., Макаров В.А., Брыскин И.Е . Потенциостатические методы в коррозионных исследованиях и электрохимической защите / под ред. Я.М. Колотыркина. – Л.: Химия, 1972. – 240 с. 18. Василевская С.И., Герасимов Н.В . Исследование анодного поведения меди в условиях электрохимической обработки // Наука. Промышленность. Оборона: труды 16 Всероссийской научно-технической конференции, посвященной 70-летию Победы в Великой Отечественной войне, Новосибирск, 22–24 апреля 2015 г. – Новосибирск, 2015. – С. 178–182. 19. Локализация процесса / Ю.Н. Петров, Г.Н. Корчагин, Г.Н. Зайдман, В.П. Саушкин // Основы повышения точности электрохимического формообразования. – Кишинев: Штиинца, 1977. – С. 26–31. STUDY OF SILICON ANODIC BEHAVIOR IN ALKALINE ELECTROLYTE Vasilevskaya S.I. , Ph.D. student, e-mail: Svetlana.vasilevskaya.87@mail.ru Makarov V.F., Master’s Degree student, e-mail: lion77167@gmail.com Novosibirsk State Technical University, 20 Prospekt K. Marksa, Novosibirsk, 630073, Russian Federation Abstract The paper discusses processes of electrochemical dissolution of silicon in a 5% aqueous potassium alkaline electrolytes and sodium hydroxide (KOH, NaOH) in a stationary (potentiodynamic) conditions and intensification of the sample surface. For polarization studies following equipment is used: potentiostat model P – 5827M, a device for current registration and three-electrode electrochemical cell. The object of study of this research is the silicic plate on a metallic substrate with the area S = 0.22 cm 2 and thickness h = 0.3 mm. It is revealed that the conditions under potentiodynamic method ECM in the range of potentials from 0 V to 2.5 V the increase the current density 0.02 A / cm 2 is observed in KOH and up to 0.008 A / cm 2 in NaOH. At potentials ranging from 2.5 V to 8 V the passivation process is occurs. It is found from the results that the current density is increased during intensification of the surface in the entire investigated range of potentials of from 0 V to 8 V. It is determined that the current density increased in 10 times under mechanical surface stripping in electrolytes in the potential range of 0 V to 8 V. Keywords anodic behavior, electrolyte, silicon, and intensification of the surface, the polarization dependence, potential, current density, electrochemical machining