Corrosive media of Orenburg gas condensate field on the condition of metal structures

Analytical Modeling of Fracture of Materials with Environment Assisted Delaminations

“…The developed model will now be used for the analysis of fracture kinetics of the protective coating of metal or steel bodies [6][7] which are exploited in the conditions of hydrogen embrittlement [14]. Let the initial fracture radius be a 0 = 1 mm (e.g., Jones, 1983) [26] and consider its increase to a = 10 mm as a result of delamination.…”

“…(a) (b) Fig.1 (a) Hydrogen induced fracture near the external surface of a steel pipe (after [6]), (b) hydrogen generated blisters on the [metal] surface (after [9]). …”

“…For example, in the case of pipelines for hydrocarbon transport [6][7], anti-corrosion, polymer coating sometimes results in more frequent appearance of small scale delaminations [8]. In time, these delaminations spread under molecular hydrogen accumulated in a cavity, damaging the coating and allowing the moisture access to the metal; the result being the external corrosive fracture of the pipeline and its premature replacement.…”

Asymptotic approach to the constant velocity of hydrogen delamination growth

“…The developed model will now be used for the analysis of fracture kinetics of the protective coating of metal or steel bodies (e.g., [7,8]) which are exploited in the conditions of hydrogen embrittlement (e.g., [35]). Let the initial fracture radius be a 0 ¼ 1 mm and consider its increase to a ¼ 10 mm as a result of delamination.…”

“…For example, in the case of pipelines for hydrocarbon transport (e.g., [7,8]), anti-corrosion, polymer coating sometimes results in more frequent appearance of small scale delaminations [9]. In time, these delaminations spread under molecular hydrogen accumulated in a cavity, damaging the coating and allowing the moisture access to the metal; the result being the external corrosive fracture of the pipeline and its premature replacement.…”