Estimation of an Influence of Electrolyte Properties and Mechanical Condition of low Carbon Steel on its Corrosion Behavior in NaCl Solutions

Issue 3(81) 2016
Pages 41-51

S.N. Asharin, D.S. Sirota, A.N. Ulikhin, D.N. Zapevalov, N.K. Shamshetdinova

LLC «Gazprom VNIIGAZ», Razvilka, Moscow region

Keywords: potential, flow velocity, cathode protection, low carbon steel

Corrosion-electrochemical behavior of low carbon steel in modeling sea water when exposed four factors, namely, temperature, flow velocity, sea water salinity and tensile stresses was investigated. An installation for study of electrochemical behavior of steel in fluid medium with synchronous load (in elastic deformation area) to a work electrode was designed and tested. Factors relevance influencing on corrosion rate, stationary and corrosion potentials of low carbon steel in modeling sea water were detected. Given results show an intensification of corrosion processes under maximal magnitude of medium flow velocity factor with other equal conditions. It has been investigated that the load on low carbon steel leads to potential shift into cathode direction that intensifies corrosion processes on steel surface and increases corrosion rate.