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Keywords: cathodically
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Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12907
... ABSTRACT A field study was conducted to determine the influence of the AC current density and of the coating holiday size on the rate of AC corrosion. This field study involved burying steel coupons of three different sizes (i.e., 1 cm 2 , 6 cm 2 , and 10 cm 2 ), applying cathodic protection...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-10723
... ABSTRACT A study of alternating current (AC) interference on cathodically protected pipeline from railway electrification systems was conducted. A continuous data logger capable of measuring the pipe to soil potential at a sampling interval of 1.25s was developed specifically for the purpose...
Proceedings Papers

Paper presented at the CORROSION 2015, March 15–19, 2015
Paper Number: NACE-2015-5594
... Abstract Coupons simulating the coating defects have been used to evaluate cathodic protection level of steel structures. This paper aims to provide requirements for coupon AC current density as affecting AC corrosion of cathodically protected steel pipelines. The field investigation...
Proceedings Papers

Paper presented at the CORROSION 2015, March 15–19, 2015
Paper Number: NACE-2015-5753
... Abstract Carbon steel pipes used to transport hydrocarbons and dangerous fluids are provided with corrosion prevention systems, namely an insulating coating and a cathodic protection (CP) system which reduces (or halts) corrosion rate below 10 µm/y, which is the maximum accepted corrosion...
Proceedings Papers

Paper presented at the CORROSION 2015, March 15–19, 2015
Paper Number: NACE-2015-5721
... and voltage gradients measurements over a 24 h period. As regards carbon steel under cathodic protection condition, anodic DC interference is considered unacceptable if the IR-free potential is more positive than the protection potential provided by standard (-0.850 V CSE in aerobic condition). But, duration...
Proceedings Papers

Paper presented at the CORROSION 2015, March 15–19, 2015
Paper Number: NACE-2015-5995
... houston flowline corrosion mild steel cathodically manuscript promotor riser corrosion texas 77084 steel cathodic polarization nacl mgcl 2 well integrity steel membrane permeation rate hydrogen permeation materials and corrosion pipeline corrosion subsurface corrosion...
Proceedings Papers

Paper presented at the CORROSION 2015, March 15–19, 2015
Paper Number: NACE-2015-5911
... and mechanical properties. specimen oilfield chemistry permission upstream oil & gas houston cathodically plastic strain manuscript ductility corrosion management hydrogen stress publication division production chemistry h2s management hydrogen mechanical property corrosion inhibition...
Proceedings Papers

Paper presented at the CORROSION 2014, March 9–13, 2014
Paper Number: NACE-2014-4118
... Corrosion Production Chemistry Upstream Oil & Gas Subsurface Corrosion H2S management steel bar assessment chloride corrosion threshold dependence cathodically Corrosion Inhibition construction materials riser corrosion Corrosion Management steel potential threshold dependence permission...
Proceedings Papers

Paper presented at the CORROSION 2014, March 9–13, 2014
Paper Number: NACE-2014-4171
... ABSTRACT It is generally accepted that a buried steel structure cannot be cathodically polarized to a potential much more electronegative than approximately -1.2 V CSE , due to the limiting potential encountered with the electrolysis of water. Nevertheless, cathodic protection data obtained...
Proceedings Papers

Paper presented at the CORROSION 2013, March 17–21, 2013
Paper Number: NACE-2013-2488
... ABSTRACT The premature failure of water pipelines has resulted in an increased awareness that preventing external corrosion on water mains is critical. Cathodic protection, which has been in wide use for decades in the oil and gas industry, has been recognized as a cost effective method...
Proceedings Papers

Paper presented at the CORROSION 2011, March 13–17, 2011
Paper Number: NACE-11321
... Pipeline Corrosion well integrity flowline corrosion riser corrosion acinduced corrosion materials and corrosion Upstream Oil & Gas ac potential Subsurface Corrosion corrosion Pourbaix diagram vcu cuso 4 criteria cathodically Probe criterion ac corrosion evaluation waveform...
Proceedings Papers

Paper presented at the CORROSION 2010, March 14–18, 2010
Paper Number: NACE-10032
... ABSTRACT In order to assess cathodic protection (CP) criteria in the presence of alternate current (AC) interference, weight loss tests on cathodically protected carbon steel specimens (CP current density in the range of 0.2 to 10 A/m 2 INTRODUCTION Buried pipelines used to transport...
Proceedings Papers

Paper presented at the CORROSION 2010, March 14–18, 2010
Paper Number: NACE-10069
...2010 1 FINDING AND DETERMINING THE CAUSE OF EXTERNAL CORROSION ON CATHODICALLY PROTECTED PIPELINES By Richard Norsworthy Polyguard Products, Inc. Ennis, Texas [email protected] ABSTRACT Direct Assessment is a very good method of determining if external corrosion is a potential problem on a coated...
Proceedings Papers

Paper presented at the CORROSION 2010, March 14–18, 2010
Paper Number: NACE-10108
...2010 AC CORROSION AND CATHODIC PROTECTION OF BURIED PIPELINES Lucio Di Biase ISPROMA SrL Via Boezio, 6 Rome, Italy, 00193 Ranieri Cigna ISPROMA SrL Via Boezio, 6 Rome, Italy, 00193 Osvaldo Fumei ATECHMA 72 BIS Rue des Saints Péres Paris, France, 75007 ABSTRACT The subject of AC corrosion...
Proceedings Papers

Paper presented at the CORROSION 2009, March 22–26, 2009
Paper Number: NACE-09116
... are solely those of the author(s) and are not necessarily endorsed by the Association. Printed in the U.S.A. CAUSES OF EXTERNAL CORROSION ON COATED AND CATHODICALLY PROTECTED PIPELINES RICHARD NORSWORTHY POLYGUARD PRODUCTS, INC. P.O. Box 755 Ennis, Texas 75120-0755 214-912-9072 or 214-515-5000 ABSTRACT Each...
Proceedings Papers

Paper presented at the CORROSION 2009, March 22–26, 2009
Paper Number: NACE-09407
... Pipeline Corrosion materials and corrosion Upstream Oil & Gas water management riser corrosion criteria steel CSE polarization flowline corrosion Subsurface Corrosion cathodic protection contribution protection SRB cathodic polarization well integrity protection potential...
Proceedings Papers

Paper presented at the CORROSION 2008, March 16–20, 2008
Paper Number: NACE-08408
... Production Chemistry equilibrium hydrogen activity flux Corrosion Inhibition H2S management concentration cathodically oilfield chemistry Corrosion Management hydrogen entry carbon steel Upstream Oil & Gas hydrogen damage hydrogen cathodic protection sea water charging...
Proceedings Papers

Paper presented at the CORROSION 2008, March 16–20, 2008
Paper Number: NACE-08072
... ABSTRACT There is a great deal of industry discussion concerning the appropriateness of the use of the "100 mV Polarization" cathodic protection criterion in facilities where multiple metallic compositions (mixed metals) are installed underground and are mechanically/electrically bonded...

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