Abstract
Alternating current accelerates stress corrosion cracking of grade X70 pipe steel in electrolytes of various compositions: 3.5% NaCl solution (pH 7), citrate buffer (pH 5.5), and a mixture of NS4 solution with borate buffer (pH 7). The increase in crack growth rate upon static load and deterioration of steel crack resistance during constant extension rate testing correlate with an increase in the metal corrosion rate.
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ACKNOWLEDGMENTS
The measurements were performed using the equipment of Center for Collective Use of the Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences.
Funding
This work was supported by the Russian Foundation for Basic Research, project no. 16-08-00445.
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Nenasheva, T.A., Marshakov, A.I. & Ignatenko, V.E. The Influence of Alternating Current on Stress Corrosion Cracking of Grade X70 Pipe Steel. Prot Met Phys Chem Surf 56, 1223–1231 (2020). https://doi.org/10.1134/S2070205120070126
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DOI: https://doi.org/10.1134/S2070205120070126