... Abstract This paper discusses case studies of high voltage direct current (HVDC) & high voltage alternating current (HVAC) crossing Pipelines right of way (RoW) showcasing the effects of alternating current (AC) interference with respect to AC corrosion and Safety Hazards while running...

... pipeline corrosion well integrity ac voltage material protection materials and corrosion midstream oil & gas ac corrosion mitigation subsurface corrosion ampp ac current density current density flowline corrosion riser corrosion resistance retrieval system permission...

... output of a galvanic CP system is primarily dependent on the circuit resistance and the potential differences between anode and cathode, i.e., driving voltage. Vapor Corrosion Inhibitors (VCIs) are being used in combination with CP systems for the tank bottom soil-side applications. When VCIs are exposed...

... (Leuven) Belgium Lance Barton Structural Integrity Associates, Inc. 10731 E. Easter Avenue, Suite 100 Centennial, Colorado, 80112 USA ABSTRACT The AC interference between High Voltage AC (HVAC) power lines and pipelines has been modeled with various software programs, all of which have a variety of input...

... placement was not adequate to prevent additional damage. After multiple repairs and replacement, a decision was made to model and analyze and this area of concern. Keywords: Steady State Voltage and Currents, Fault Conditions, Alternating Current (AC) Current Density, Mitigation, Interference, Fusion Bonded...

... Underground Transmission Line Feasibility Study Matthew Lechelt Corrpro Canada, Inc. 11405 163rd Street NW Edmonton, Alberta, T5M 3Y3 Canada ABSTRACT Alternating Current (AC) interference affects pipelines collocated near high voltage transmission lines. While overhead high voltage transmission...

... be understood that mitigation of IAC Voltages and currents in paralleling underground pipelines is a very complex study which should not be undertaken by an inexperienced practitioner. There is a vast resource of published works on the subject that can give one new to the process a working knowledge...

... resistance in severe environments. In previous studies its effectiveness in enhancing oxide film resistance in halides was correlated with anodization cell voltage. To increase treatment industrial applicability, energy efficiency has to be maximized. For this purpose, a gravimetric approach was applied...

... on a single wire electrode couple is shown in Figure 3. The circuit consisted of a variable transformer for controlling the applied AC voltage. The secondary side of the variable transformer was electrically connected to the primary side of an isolation transformer as shown in the figure. The secondary...

... cases, the dynamic AC corrosion of buried pipeline has attracted more and more attention. materials and corrosion riser corrosion mechanism texas 77084 voltage Pipeline Corrosion Subsurface Corrosion rail transportation well integrity corrosion rate permission Houston railway flowline...

.... Exposure to moisture, sweat, and other electrolytes in combination with an applied voltage during charging presents a significant corrosion concern. Herein we present structural, mechanical and immersion corrosion properties of a newly developed nanocrystalline NiMo alloy and provide comparisons to pure Ni...

... ABSTRACT The main purpose of this joint industrial R&D project was to perform detailed field measurements on selected pipeline segments in close vicinity to a High Voltage Direct Current (HVDC) transmission line during planned staged fault tests on the power line. Induced voltages on these pipelines were...

... ABSTRACT Pipelines located near high voltage alternating current (AC) transmission lines may be subjected to induced AC current buildup. Present mitigation strategies employ parallel electrical paths, effectively dumping excess electrical charge safely to ground. These strategies use...

... ABSTRACT Dutch distribution system operators realize that the low voltage grid is becoming increasingly relevant due to modern developments such as charging of electric cars and photo-voltaic cells on domestic rooftops. To get a better grip on the quality of their low voltage grids, a better...

... and interference condition of both the carrier pipe and the casing in the case where water is present in the annulus. Cathodic protection was applied to the gas pipe by an impressed current system, cell voltage was increased and the IR-free potential of both pipes was measured. Different configurations were...

... to an unexpected corrosion threat - alternating current (AC) effects due to micro holidays. Normally these extremely small defects are not a problem regarding cathodic protection; however, they become a threat when AC and DC voltage and current densities become relatively high, when co-located near high current...

... voltages to a safe level during both load and fault conditions of the rail lines. Shielding, grounding, use of gradient control mats and polarization cells are some of the proven mitigation techniques. Among these the use of solid state polarization cells is found to be more efficient and is gaining...

... integrity Publication Division Pipeline Corrosion riser corrosion corrosion rate pd scan permission texas 77084 dependency equivalent circuit waste form current density materials and corrosion corrosion current bp term electrode Houston radionuclide SCE manuscript composition voltage...

... drawbacks in that indium is relatively expensive, and some of its compounds are considered toxic. 45 They also operate at voltages which generates hydrogen gas, potentially embrittling many types of high strength steels. 6 metals & mining riser corrosion segregation Pipeline Corrosion well...

..., stainless steels, and Zircaloy-4 that can be used to represent H2 generation rates under the range of Eh-pH conditions that could occur in a disposal system. Potentiostatic tests are being conducted to monitor the anodic corrosion current over several days as the surface corrodes at an imposed voltage...