Effect of temperature on the crack growth in pipe steel X70 in a weakly acidic electrolyte

• A.I. Marshakov¹, Vo Tien², V.E. Ignatenko¹ and A.V. Muradov²

¹ A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31, Moscow, 119071 Russian Federation
² Gubkin Russian State University of Oil and Gas, Leninsky pr. 65, Moscow, 119991 Russian Federation

Abstract: The temperature dependences of crack growth in static tests of X70 pipe steel in citrate buffer (pH 5.5) and in the same solution containing 1 mM sulfide were studied. The activation energies of corrosion crack growth were determined. It was shown that addition of IFKhAN-29-3 organic corrosion inhibitor hindered the crack growth and the protective effect increased with an increase in temperature.

Keywords: pipe steel, stress corrosion cracking, weakly acidic buffer, inhibitor, temperature, activation energy

Int. J. Corros. Scale Inhib., 2017, 6, no. 2, 151–161 PDF (1 203 K)
doi: 10.17675/2305-6894-2017-6-2-5

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