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. 2018 Mar 22;11(4):465. doi: 10.3390/ma11040465

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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SEM images of the fracture surface of X70 steel: in air (a); and in NS4 solution under different CP potentials: (b) OCP; (c) −0.775 V_SCE; (d) −0.85 V_SCE; (e) −0.95 V_SCE; (f) −1.05 V_SCE; and (g) −1.2 V_SCE.

SEM images of the fracture surface of X70 steel: in air (a); and in NS4 solution under different CP potentials: (b) OCP; (c) −0.775 V_SCE; (d) −0.85 V_SCE; (e) −0.95 V_SCE; (f) −1.05 V_SCE; and (g) −1.2 V_SCE.