Estimation of an Influence of Electrolyte Properties and Mechanical State of Low Carbon Steel on Potential and Current Density in NaCl Solutions in Concentration Range from 0.3 to 3%

Issue 4(82) 2016
Pages 37-40

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

LLC «Gazprom VNIIGAZ», Razvilka, Moscow

Keywords: potential, current density, flow velocity, cathodic protection, 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) on a work electrode was designed and tested. Relevance of factors influencing on current density of electrochemical protection of low carbon steel was detected. It was established that the increase of NaCl solution concentration and temperature of solution lead to the growth of current density of electrochemical protection (under 100 mV potential shift from steady-state value). It is defined that application of load on low carbon steel leads to the decrease of current density of cathodic protection.