Application of SSRT to estimate the effect of corrosive medium on the liability of X70 pipe steel to stress corrosion cracking

• V. E. Ignatenko¹, Yu. I. Kuznetsov¹, A. B. Arabei², R. V. Igoshin¹, R. I. Bogdanov¹ and A. I. Marshakov¹

¹ A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119071 Russian Federation
² Open Joint-Stock Company “Gazprom”, ul. Nametkina 16, Moscow, 117997 Russian Federation

Abstract: The slow strain rate test was used to study the effect of a number of corrosive soil electrolyte components and corrosion inhibitors on the liability of pipe steel X70 to stress corrosion cracking in weakly acidic and neutral media simulating the electrolyte under delaminated coatings on underground pipelines. The electrochemical behavior of X70 pipe steel in the presence of some corrosion inhibitors was studied. It was shown that inhibitors of metal anodic dissolution can considerably improve the cracking resistance of pipe steel.

Keywords: stress corrosion cracking, underground pipelines, pipe steel, slow strain rate method, sulfide, carbonate, inhibitor protection

Int. J. Corros. Scale Inhib., 2013, 2, no. 4, 318 – 336 PDF (1 461 K)
doi: 10.17675/2305-6894-2013-2-4-318-336

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