... platform protection potential Publication Division inspection plan flowline corrosion materials and corrosion Production Chemistry well integrity H2S management model prediction coating main platform manuscript ancillary jacket Houston steel jacket permission inspection point CP system...

... facility for treatment and disposal. The concentrated waste is then returned to the double-shell tanks for storage. materials and corrosion metals & mining riser corrosion Pipeline Corrosion well integrity test specimen Upstream Oil & Gas localized corrosion protection potential...

... in such situations. steel face positive potential permission variation Houston cavity Publication Division diameter cross-section narrow channel protection potential wall thickness anode manuscript electrolyte texas 77084 geometry separation distance IR drop Assessment of Effects...

... condition. Test has been performed both in normal and overprotection condition, varying the off period duration, monitoring weekly the protection potential. Key words: Cathodic protection; carbon steel; protection potential; oxygen reduction; overprotection. INTRODUCTION Buried carbon steel pipelines...

... the structure, computer modelling is necessary because the classical anode resistance formulas are not applicable. floating production system Publication Division coating Upstream Oil & Gas resistance ICCP system interference FPSO protection potential turret chain connector subsea system...

... the protection potential in projects with CP 5. Lowerable rack of sensors including potential, pH, dissolved oxygen, temperature and resistivity External side: A. Drop-cell (reference cell) measuring protection potential of CP B. Stabber (contact reference cell) mounted on ROV for measuring the protection...

... technique has produced an uncertain or undefined protection potential (E prot ) related to pitting corrosion. The ASTM G192 standard or Tsujikawa-Hisamatsu Electrochemical (THE) technique was originally developed to address similar problems in assessing the crevice corrosion susceptibility of corrosion...

... be competently designed for stand-alone operation, but when combined together, protection potentials and life of the systems may be affected by interference. Consequences may include early consumption of anodes and more positive potentials towards end of life. Such effects can readily occur when different...

... energy subsurface corrosion cathodic protection permission texas 77084 mean current density flowline corrosion materials and corrosion renewable energy aluminum anode anode acidification initial current density seawater metals & mining riser corrosion protection potential current...

... to about 800 A/m 2 . Samples were cathodically polarised in the presence of AC interference for four months: protection potential, protection current density and AC density were periodically monitored. Based on experimental results, a corrosion risk map is proposed: overprotection (potential more negative...

... in different environmental conditions, and reproducible results have been obtained. Key words: cathodic protection, splash zone, tidal zone, conducting materials, protection potential. 1 Paper No. 3627 ©2014 by NACE International. Requests for permission to publish this manuscript in any form, in part...

... chloride content permission PREN chemical composition Markov chain crevice corrosion Pipeline Corrosion riser corrosion chloride concentration Government work transition probability stainless steel critical chloride content transition matrix protection potential corrosion application...

... corrosion. However, the direct electric heating system can influence design parameters for cathodic protection, such as sacrificial anode capacity, protection potential and design current densities. This may have large consequences for design of the CP system in terms of number anodes and required anode...

... are different from those in shallow water. All these differences will exert some influences on the current density requirement and performances of sacrificial anodes. oilfield chemistry Midstream Oil & Gas protection potential Corrosion Inhibition Upstream Oil & Gas cathodic protection...

... anode Upstream Oil & Gas protection potential stainless steel protection manuscript Cathodic Protection of Stainless Steels and other Corrosion Resistant Alloys Jan Heselmans Corrodium bv Planetenweg 5 NL-2132 HN Hoofddorp René Wouts Corrodium bv Planetenweg 5 NL-2132 HN Hoofddorp ABSTRACT...

... on specimen made from typical pipeline steels polarized to a standard cathodic protection level have been investigated. Special focus has been put on development of calcareous deposits under influence from AC voltage. Furthermore, effects from AC voltage on cathodic protection potential have been studied...

..., as a variation of THE method, the PD-GS-PD technique was introduced. The aim of the present work was to determine reliable critical or protection potentials for crevice corrosion of Alloy 22 in pure chloride solutions at 90ºC. Conservative methodologies (which include extended potentiostatic steps) were applied...

... is more electronegative than? -1.15 V CSE). Uncertainties still exist on protection potential interval and on protection current density to reach an acceptable protection when AC interference is present. In the presence of AC interference, with possible AC-induced corrosion on the pipeline...

... the electrolyte is determined by solving the Laplacian equation, using the boundary element method. The entire process is non-linear, and is solved iteratively. The results of the mathematical modelling include current density and protection potentials on all parts of the tank base, as well as power loss...

... flowline corrosion Subsurface Corrosion protection potential exposure Pipeline Corrosion well integrity open circuit metals & mining riser corrosion calcium carbonate materials and corrosion cathodic protection corrosion rate specimen seawater calcium weight loss artificial...