corrosion behaviors of x70 steel under direct current

Effects of Stray AC Interference on Corrosion Behavior of

Effects of Stray AC Interference on Corrosion Behavior of

In this research, the corrosion behavior of X70 high strength pipeline steel under a load of AC signal with various current densities was investigated. The test solution was a simulated marine soil solution. A NaCl solution was used as a comparison. A tensile stress was applied to simulate the serving condition.sp.info EFFECTS OF ALTERNATING CURRENT ON X70 STEEL Alternating current(AC) corrosion is a significant problem to metal structures in close proximity to alternating current carrying conductors.While for direct current(DC) interference there is large agreement on protection criteria to be used for corrosion mitigation,but the mechanism and relationship between AC density and corrosion rate are still not clear,although some studies have been sp.info A study on corrosion behaviors of Ni–Cr–Mo laser coating Apr 15, 2016 · This is the case for X70 in CO 2 &H 2 S solution (1:1) , in which X70 has a little lower I corr than that in H 2 S solution ascribed to the more stable iron sulfides under a little higher pH caused by the dissolution of CO 2. In terms of Ni–Cr–Mo coating and 316 SS, their corrosion processes are mainly controlled by the dense oxide films that prevent the harmful ions from penetrating inside the sp.info Effect of plastic deformation on the electrochemical and Nov 20, 2016 · This work investigated the effect of plastic deformation on the electrochemical and stress corrosion cracking (SCC) behavior of X70 steel in near-neutral pH environment. The deformation-induced increase in electrochemical activity, dislocation density and heterogeneity, and surface roughness accelerated the corrosion, especially the cathodic reactions.


			Electrochemical Corrosion Study of Buried Pipeline Steel

Electrochemical Corrosion Study of Buried Pipeline Steel

Oct 09, 2019 · Stray current corrosion will cause severe electrochemical corrosion to the metallic structures in and around the subway system, such as buried pipelines, running rails and concrete reinforcement etc. In view of the current situation of buried pipelines being affected by stray current corrosion, this paper starts with the stray current corrosion sp.info Top PDF Corrosion Behavior of X80 Pipeline Steel under Corrosion Behavior of X100 Pipeline Steel and Its Heat-Affected Zones in Simulated Alkaline Soil Solution External corrosion is one of the main potential risks of buried oil and gas pipelines. The different microstructure and microcomposition of the heat-affected zone (HAZ), the base steel , and the weldment at the welding zones increases the sp.info (PDF) The effect of acetic acid on the CO2 corrosion of The effect of acetic acid on the CO2 corrosion of grade X70 steel. M. Honarvar Nazari. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 8 Full PDFs related to this paper. READ PAPER. The effect of acetic acid on the CO2 corrosion of grade X70 steel. Download.sp.info Corrosion Behavior of X80 Pipeline Steel under Coupling Corpus ID:225075163. Corrosion Behavior of X80 Pipeline Steel under Coupling Effect of Stress and Stray Current @inproceedings{Wang2014CorrosionBO, title={Corrosion Behavior of X80 Pipeline Steel under Coupling Effect of Stress and Stray Current}, author={X. Wang and X. Tang and Liwei Wang and C. Wang and Zhenzhen Guo}, year={2014} }


			Effects of stray AC on delamination of epoxy coatings

Effects of stray AC on delamination of epoxy coatings

Fig. 4 shows the open circuit potential (OCP) test results of X70 steel epoxy coating samples of different sizes under AC interference with various current densities. The OCP is negatively shifted with the increase of AC density. On the X70 steel epoxy coated sample with a defect area of 0.5×0.5sp.info (PDF) Analysis of electrochemical noise of X70 steel in Ku Materials and Corrosion 2009, 60, No. 7 DOI:10.1002/ma200805139 527 Analysis of electrochemical noise of X70 steel in Ku’erle soil by cluster analysis J. Y. Huang, Y. B. Qiu* and X. P. Guo Electrochemical noise (EN) technique was employed to study the corrosion behaviors of the X70 pipeline steel in the Xinjiang Ku’erle saline soil (moisture content 1.04%) during the initial corrosion sp.info A Review of the Effect of AC/DC Interference on Corrosion Pipelines installed in the energy utility corridor with alternating current (AC) or direct current (DC) sources have attendant problem of induced corrosion. In the past years, AC or DC induced corrosion of metallic pipelines has been a major challenge facing pipeline utilities.sp.info Study on the interference between cathodic protection Purpose Under normal conditions, there are different protection objects inside and outside the gas station, so two sets of independent cathodic protection systems are adopted. At the same time, an insulating flange is applied at the position where trunk pipelines access to the gas station, which realizes electrical isolation of the structures inside and outside the station.