Analysis of Metal Corrosion under Conditions of Mechanical Impacts and Aggressive Environments

• Дата: 2017
• Автори: Yuzevych, V.M., Dzhala, R.M., Koman, B.P.
• Формат: Стаття
• Мова: English
• Опубліковано: Інститут металофізики ім. Г.В. Курдюмова НАН України 2017
• Назва видання: Металлофизика и новейшие технологии
• Теми: Металлические поверхности и плёнки
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/130471
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Analysis of Metal Corrosion under Conditions of Mechanical Impacts and Aggressive Environments / V.M. Yuzevych, R.M. Dzhala, B.P. Koman // Металлофизика и новейшие технологии. — 2017. — Т. 39, № 12. — С. 1655-1667. — Бібліогр.: 16 назв. — англ.

Based on standpoints of the surface physics, fracture mechanics and electrochemistry, a mathematical model of the physical and chemical processes near the crack tip of a metal under mechanical loads in aqueous electrolyte solutions is developed. Calculations of the energy and electrochemical characteristics are performed for the steel 20 in the 3% solution of sodium chloride. Parameters of the Tafel-type relationship between the anode current and the difference of electrode potentials are analysed. Well-known Kaeshe expression for the current density on the juvenile surface of a crack bottom is generalized both by linear approximation of the dependence of corrosion current density on surface energy of plastic deformation of the metal and with accounting for increase of mechanical tensile stress up to yield limit.