Testing Analysis of AC Corrosion Safety Boundary Based on X70 Steel Corrosion Coupons

WU Guangchun, CAO Guofei, CHEN Yuliang, ZHANG Mengmeng, WANG Xiuyun, DU Yanxia

doi:10.16577/j.issn.1001-1560.2023.0228

Today is Email Alert　 RSS

Materials Protection >

2023 , Vol. 56 >Issue 9: 169 - 176

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0228

Testing Analysis of AC Corrosion Safety Boundary Based on X70 Steel Corrosion Coupons

Expand

(1.Safetech Research Institute， Beijing 102200， China；2.PipeChina West East Gas Pipeline Company， Shanghai 210000， China；3.Institute for Advanced Materials and Technology， University of Science and Technology Beijing， Beijing 100083， China)

Received date: 2023-03-16

Revised date: 2023-04-12

Accepted date: 2023-05-12

Online published: 2023-09-15

Fold

Abstract

In this paper， based on the on-site testing of cathodic protection corrosion coupons buried in 6 cities in China， combined with some indoor corrosion simulation test results， the safety boundary of cathodic protection for buried pipelines under AC interference was preliminarily established through the analysis of the correlation between cathodic protection and interference parameters of the test coupons and corrosion rates.Results showed that corrosion rate of the test coupons under AC interference decreased with the increase of the test coupons area.The AC corrosion safety boundary based on polarization potential was established: control the polarization potential to be in the range of－0.85～－1.20 V(vs CSE) and the AC current density to be less than 30.0 A/m2， or control the polarization potential to be in the range of－0.95～－1.10 V(vs CSE) and the AC current density to be less than 100.0 A/m2.The AC corrosion safety boundary based on DC current density was established: control the DC current density to be in the range of 0.15～20.00 A/m2 and the AC current density to be less than 30.0 A/m2， or control the DC current density to be in the range of 0.15～1.08 A/m2 and the AC current density to be less than 100.0 A/m2.The AC corrosion safety boundary based on pH was established: control the pH to be in the range of 10.0 ～14.0 and AC current density to be less than 30.0 A/m2 or control the pH to be in the range of 11.3～12.5 and AC current density to be less than 100.0 A/m2.

Key words： cathodic protection corrosion coupon; AC corrosion; cathodic protection; safety boundary; X70 steel

Cite this article

WU Guangchun, CAO Guofei, CHEN Yuliang, ZHANG Mengmeng, WANG Xiuyun, DU Yanxia . Testing Analysis of AC Corrosion Safety Boundary Based on X70 Steel Corrosion Coupons[J]. Materials Protection, 2023 , 56(9) : 169 -176 . DOI: 10.16577/j.issn.1001-1560.2023.0228

References

[1] 曹楚南.腐蚀电化学原理[M].北京:工业装备与信息工程出版中心， 2004.CAO C N.Principle of corrosion electrochemistry[M].Baijing: Industrial Equipment and Information Engineering Publishing Center of the Chemical Industry Press， 2004.

[2] 杨燕，李自力.交流干扰对油气管道的腐蚀危害与防护[C]/ /2009 年全国石油和化工行业腐蚀与防护技术论坛.昆明:[出版者不详]，2009.YANG Y， LI Z L.Corrosion hazards and protection of oil and gas pipelines caused by AC interference[C]/ /2009 National Petroleum and Chemical Industry Corrosion and Protection Technology Forum.Kunming:[s.n.]， 2009.

[3] LALVANI S B， LIN X A.A theoretical approach for predicting AC-induced corrosion[J].Corrosion Science，1994，36(6):1 039－1 046.

[4] DU Y X， WANG L Y， LU M X， et al.Study on AC interference mitigation design methods for buried pipeline[C]/ /Corrosion/2013.Houston: NACE， 2013:paper No.2444.

[5] 郭剑，曹玉杰，胡士信，等.交流输电线路对输油输气管道电磁影响的限值[J].电网技术， 2008， 32(2):17－20.GUO J，CAO Y J，HU S X，et al.Limit values of electromagnetic influence of adjacent AC transmission lines on oil/gas pipelines[J].Power System Technology， 2008， 32(2):17－20.

[6] IBRAHIM I， TAKENOUTI H， TRIBOLLET B， et al.Harmonic analysis study of the AC corrosion of buried pipelines under cathodic protection[C]/ /Corrosion/2007.Houston:NACE， 2007: paper， No.07042.

[7] XU L Y， SU X， CHEN Y F.Effect of alternating current on cathodic protection on pipeline [J].Corrosion Science，2013， 66(1):263－268.

[8] BS EN 15280:2013， Evaluation of a.c.corrosion likelihood of buried pipelines applicated to cathodically protected pipelines[S].

[9] BS ISO 18086:2020，Corrosion of metals and alloys—Determination of AC corrosion—Protection criteria[S].

[10] NACE SP21424－2018， Alternating current corrosion on cathodically protected pipelines: risk assessment， mitigation，and monitoring[S].

[11] HOSOKAWA Y， KAJIYAMA Y， NAKAMURA Y.New CP criteria for elimination the risks of AC corrosion and overprotection on cathodically protected pipelines[C]/ /Corrosion/2002.Houston: NACE， 2002: paper No.02111.

[12] NIELSEN L V， NIELSEN K V.AC-induced corrosion in pipelines: detection， characterization and mitigation[C]/ /Corrosion/2004.Houston: NACE， 2004: paper， No.04211.

[13] GOIDANICH S， LAZZARI L， ORMELLESE M.AC corrosion－ part 1: effects on overpotential of anodic and cathodic processes[J].Corrosion Science， 2010， 52:491－497.

[14] POURBAIX A， CARPENTIERS P， GREGOOR R.Detection and assessment of alternating current corrosion[J].Materials Performance， 2000， 39(3):34－37.

[15] ORMELLESE M， LAZZARI L， GOIDANICH S， et al.CP criteria assessment in presence of AC interference[C]/ /Corrosion/2008.Houston: NACE， 2008: paper， No.08064.

[16] GOIDANICH S， LAZZARI L， ORMELLESE M， et al.Influence of AC on corrosion kinetics for carbon steel， zinc and copper[C]/ /Corrosion/2005.Houston: NACE， 2005:paper， No.05189.

[17] 唐德志.交流电流对埋地管道阴极保护系统的影响规律及作用机制研究[D].北京:北京科技大学，2016.TANG D Z.Study of alternating current interference on cathodic protection system of buried pipeline[D].Beijing:University of Science and Technology Beijing， 2016.

[18] DU Y X， XIAO Y W， XIE S L， et al.Research on the effects of environmental parameters on AC corrosion behavior[C]/ /Corrosion/2018.Houston: NACE， 2018: paper， No.10676.

[19] PHILIPPE C.AC corrosion: detection， investigations and mechanisms[C]/ /EUROCORR/2003.Budapest: [s.n.]，2003: paper， No.307.

[20] 吴广春.交流干扰下阴极保护有效性判据及缓解措施研究[D].北京:北京科技大学，2015.WU G C.Research on cathodic protection criterion with AC interference and mitigation technology[D].Beijing: University of Science and Technology Beijing， 2015.

Options

Outlines

〈

〉

模态框（Modal）标题

Abstract

Cite this article

References