.... The tests were performed at 25 °C. Typical cathodic protection (CP) applied during the test was -1050 mV vs a saturated calomel reference electrode (SCE), to simulate the potentials associated with the mixed potential of Zn and/or Al based metallic coatings. In some cases, the effect of more negative...

... alloy anti-corrosion coatings cathodic protection sacrificial coatings INTRODUCTION The protection of oil and natural gas infrastructure against internal corrosion is an important issue facing the oil and gas industry. The internal corrosion in natural gas pipeline is primarily due to the presence...

... with cathodic protection (SW+CP) environments has used rising displacement techniques and compact tension specimens. The results of these tests are sometimes used in fracture mechanics calculations for design verification, though there is some uncertainty about the appropriate method for determining...

... structural overloading and resulting in no aesthetic change in facing profile, demonstration that current densities ranging from 5,7 to 13 mA /m² of steel reinforcing surface area were sufficient to achieve cathodic protection achievement of performance criteria after an energizing period...

... of this case study, presented in the NACE Corrosion 2019 Paper No. 13188, indicated that the 120 Hz rectifier ripple may have contributed to the accelerated AC corrosion at this location. This follow-up paper is Part A of a two-part further investigation into corrosion rates on cathodically protected...

... of underground metal structures in cathodic protection. They allow the reading of the potential purified by the ohmic drop contribution, the so-called IR-free potential, a useful parameter for assessing the effectiveness of a cathodic protection system. Aim of this work is to compare the accuracy...

... at various constant stress intensity (K-levels) and at varying cathodic protection potentials. For the fastener grade ASTM A320 L7 & L43² grade carbon alloy material the initial reported results showed that the material susceptibility to hydrogen embrittlement followed a pattern influenced...

...In the present study, pH variations during cathodic protection and DC non-stationary anodic interference are recorded using a new arrangement of the sample-pH probe and a sufficiently fast pH logger. The direct pH measurement could be used to analyze the cathode surface in the cathodic protection...

... thicknesses, aging times and CP conditions. Steel substrate tests Abstract It has been hypothesized that fusion bonded epoxy (FBE) could be partially permeable to cathodic protection (CP, producing an imbalance between cathodic and anodic reactions and inducing a high pH environment within disbonded areas...

...Abstract This paper presents a summary of the results obtained during 3 years of PhD studies on “AC Corrosion of Cathodically Protected Pipelines” at the Technical University of Denmark (DTU) ¹ , which was finalized in October 2018 and defended in January 2019. ¹ Amongst...

... the involvement in several projects. This presents the synergies between field data and cathodic protection theories. Two different field tests are presented by using DC and AC power sources furthermore a theoretical calculation but with given field data. Also, it is introduced a specific theory how to get...

...steel shell concrete immersed tunnel aluminum alloy anode cathodic protection numerical modeling backfilled stone INTRODUCTION Abstract The steel shell immersed tube tunnel will be embedded under the complex environment of marine brackish/deposited sea mud/backfilled stone. Traditional design...

... of these changes is related to the migration of ions (chlorides, etc.) as a consequence of the electric field generated by the CP system. Abstract This paper documents an investigation of pH variations in water saturated sandy soil with steel samples under impressed current cathodic protection (CP). The aim...

...In this paper an improved digital corrosion data management system is introduced which is combined with a computational model which acts as a digital twin of the asset. The combined technology enables engineers to manage and visualise CP (Cathodic Protection) survey data and provide any member...

... was observed in a low-chloride natural water environment. Through calculations, field observations and measurements, the direct cause was attributed to the combined effect of local crevice geometry and stray current interference that is induced by an adjacent foreign cathodic protection system. Based...

... at which limits should be set to provide an optimal feedback and security layer. Alarm optimization can play a vital role in the long-term success of cathodic protection engineers and pipeline operators in keeping their critical assets, and the safety of the public, well protected and in an efficient...

...Abstract AC corrosion on cathodically protected pipelines is commonly experienced due to interference from high voltage transmission lines at a frequency of 50 or 60 Hz. In some cases, the source of interference may be low frequency AC transit systems (1/3 of the fundamental frequency...

... challenges to the materials used that are often associated with high-pressure (>103 MPa) and high temperature (>177 °C) or, in arctic service, temperatures as low as -60°C. ^{1 - 3} Moreover, the presence of atomic hydrogen produced either from corrosion reactions or by cathodic protection can...

... allows for cyclic or continuous exposure to a 5% NaCl solution to imitate a marine environment. Crack widths ranging from 0.25 mm to 1 mm (0.01 - 0.04 inch) and polarization levels ranging from -430 mV to -640 mV vs the Saturated Calomel Electrode (SCE) are used. Results suggest that cathodic protection...

... could provide. Corrosion control Zn-based alloy coatings cathodic protection galvanic corrosion INTRODUCTION In the US, natural gas accounts for one third of the energy consumed [ 1 ]. The gas pipeline network consists of more than 210 individual pipeline systems and nearly 300,000 miles, Figure 1...