CIPS+DCVG在高原埋地管道外防腐层检测应用
|
摘要
针对单一的密间距管地电位测试法(CIPS)或直流电位梯度法(DCVG)在管道外防腐层检测存在不完全性的问题,本文以云贵高原某红土地区域内埋地钢制管道为对象,利用密间距管地电位测试法(CIPS)和直流电位梯度法(DCVG)对该行政区域内埋地钢制管道外防腐层完整性进行检测评价。结果表明:两种方法结合可以有效的判断出管道外防腐层的破损位置、大小、严重程度及腐蚀活性,同时可消除红土地弱酸性土壤条件下IR降的影响。两种方法的结合可以较好的评价埋地钢制管道阴极保护的真实水平。
Aiming at the single fine pitch pipe to soil potential test(CIPS) or DC potential gradient method(DCVG) anticorrosive layer detection is incomplete problem in the pipeline, this paper takes a laterite Yunnan Guizhou Plateau area within the domain of the buried steel pipeline as the object, the use of dense spacing tube ground potential test(CIPS) and DC potential gradient method(DCVG) for detection and evaluation of anticorrosion layer on the integrity of the administrative area of buried steel pipeline. The results show that the combination of the two methods can effectively judge the damage location, size, severity and corrosion activity of the outer corrosion protection layer, and eliminate the influence of the IR drop in the weak acid soil of the red soil. The combination of the two methods can better evaluate the real level of cathodic protection of buried steel pipeline.
Aiming at the single fine pitch pipe to soil potential test(CIPS) or DC potential gradient method(DCVG) anticorrosive layer detection is incomplete problem in the pipeline, this paper takes a laterite Yunnan Guizhou Plateau area within the domain of the buried steel pipeline as the object, the use of dense spacing tube ground potential test(CIPS) and DC potential gradient method(DCVG) for detection and evaluation of anticorrosion layer on the integrity of the administrative area of buried steel pipeline. The results show that the combination of the two methods can effectively judge the damage location, size, severity and corrosion activity of the outer corrosion protection layer, and eliminate the influence of the IR drop in the weak acid soil of the red soil. The combination of the two methods can better evaluate the real level of cathodic protection of buried steel pipeline.
引文
[1]栾春远.压力容器安全技术管理[J].压力容器,1998(01):62-68,89.
[2]NACE RP0502-2002,Pipeline External Corrosion Direct Assessment Methodology[S].
[3]郑光明,方晶.埋地管道腐蚀的检测新技术[J].国外油田工程,1998,4(4):41-46.
[4]赖广森,廖寄平,李嘉,等.埋地管道防腐层缺陷检测技术最新进展.管道技术与设备,1999,7(6):34-36.
[5]吴兵,罗金恒,赵新伟,等.用电流衰减法检测埋地管线的防护层[J].腐蚀与防护,2005(12):534-537.
[6]罗慧娟,张志浩,孙芳萍,刘洁,李欣.长庆气田地面集输管道防腐层检测与分析[J].石油与天然气化工,2012,41(03):326-328,361.
[7]Peter Nicholson.Combined CIPSand DCVG Surveys for Improved Data Correlation[A].NACE Corrosion 2007[C].Nashville,TN:NACE,2007.Paper07181.
[8]姚小静,王威强,张峰.埋地长输管道防腐层综合检测技术[J].压力容器,2006(02):49-51.
[9]孙宏,王庆强.国际高强度管线钢管的研究进展[J].压力容器,2012,29(01):32-38.
[10]杨烨,何骁.LNG工厂停产状态下循环冷却水腐蚀性研究[J].石油与天然气化工,2016,45(01):102-106.
[2]NACE RP0502-2002,Pipeline External Corrosion Direct Assessment Methodology[S].
[3]郑光明,方晶.埋地管道腐蚀的检测新技术[J].国外油田工程,1998,4(4):41-46.
[4]赖广森,廖寄平,李嘉,等.埋地管道防腐层缺陷检测技术最新进展.管道技术与设备,1999,7(6):34-36.
[5]吴兵,罗金恒,赵新伟,等.用电流衰减法检测埋地管线的防护层[J].腐蚀与防护,2005(12):534-537.
[6]罗慧娟,张志浩,孙芳萍,刘洁,李欣.长庆气田地面集输管道防腐层检测与分析[J].石油与天然气化工,2012,41(03):326-328,361.
[7]Peter Nicholson.Combined CIPSand DCVG Surveys for Improved Data Correlation[A].NACE Corrosion 2007[C].Nashville,TN:NACE,2007.Paper07181.
[8]姚小静,王威强,张峰.埋地长输管道防腐层综合检测技术[J].压力容器,2006(02):49-51.
[9]孙宏,王庆强.国际高强度管线钢管的研究进展[J].压力容器,2012,29(01):32-38.
[10]杨烨,何骁.LNG工厂停产状态下循环冷却水腐蚀性研究[J].石油与天然气化工,2016,45(01):102-106.