站场阳极地床的布置Layout of anode ground bed in the station

时间：2022-09-06作者：焦作市虹泰防腐材料有限公司浏览：128

站场阳极地床的布置

1、站场管道较好架空安装，不与土壤相接触。

2、站场内接地较要通过通交隔直装置与工艺管网连接(如等电位连接器、直流去耦合器、极性排流器等)。

3、建议站场区域保护采用分布式阳极或线性阳极。阳极要安装在接地较对面，尽量远离接地较。深井阳极电流分布均匀，影响范围大，但保护效果有时不好，经常会对站外管道产生阴极干扰。

4、当接地较与管网直连时，由于接地较对阴极保护电流的屏蔽，大部分阴极保护电流会经过接地较到达管道再回到电源负极，导致埋地管道欠保护。当接地较与管道隔离时，注意阴极保护电流对接地较引起的杂散电流干扰腐蚀。

5、影响阴极保护电流分布的因素是阳极地床位置，与阴极汇流点位置无关，阴极线可以在恒电位仪附近与管道连接，阴极线*延伸到被保护区域。

6、站内设施已经相互连通(管道自身连通或通过接地网连通)时，为等势体，*跨接线(除非怀疑个别法兰接触电阻太大)。

7、站场内可以用牺牲阳极替代接地较，也可以用外加电流辅助阳极兼作接地较。用辅助阳极兼作接地较时，阳极之间用电缆连接，与工艺设备之间安装避雷器或其他高压导通装置。

8、阴极线和零位线可以在站内任何位置与站内管道连接，不一定非要连接到地床位置。

Layout of anode ground bed in the station


1. The pipeline in the station should be installed overhead and not in contact with the soil.
2. The grounding electrode in the station shall be connected to the process pipe network through the AC / DC isolation device (such as equipotential connector, DC decoupler, polarity drain, etc.).
3. It is recommended to adopt distributed anode or linear anode for station area protection. The anode shall be installed opposite to the grounding electrode and away from the grounding electrode as far as possible. The anode current in deep wells is evenly distributed and has a wide range of influence, but sometimes the protection effect is not good, often causing cathodic interference to pipelines outside the station.
4. When the grounding electrode is directly connected to the pipe network, due to the shielding of the grounding electrode to the cathodic protection current, most of the cathodic protection current will reach the pipeline through the grounding electrode and then return to the negative electrode of the power supply, resulting in underprotection of the buried pipeline. When the grounding electrode is isolated from the pipeline, pay attention to the stray current interference corrosion caused by the cathodic protection current to the grounding electrode.
5. The factor affecting the current distribution of cathodic protection is the anode ground bed position, which has nothing to do with the cathode confluence point position. The cathode line can be connected to the pipeline near the potentiostat, and the cathode line does not need to extend to the protected area.
6. When the facilities in the station are connected with each other (the pipeline itself or through the grounding grid), they are equipotential bodies and do not need jumper wires (unless it is suspected that the contact resistance of individual flanges is too large).
7. In the station, sacrificial anode can be used to replace the grounding electrode, or impressed current auxiliary anode can also be used as the grounding electrode. When the auxiliary anode is used as the grounding electrode, the anodes shall be connected with cables, and lightning arresters or other high-voltage conduction devices shall be installed between the anodes and the process equipment.
8. The cathode line and the zero line can be connected to the pipeline in the station at any position in the station, not necessarily to the ground bed.



焦作市虹泰防腐材料有限公司专注于恒电位仪,智能测试桩,深井阳极,带状镁阳极,带状锌阳极,铝合金牺牲阳极,镁合金牺牲阳极,锌合金牺牲阳极等

• 词条

  词条说明

• 失重检查试片断电电位与管道断电电位的关系

  失重检查试片断电电位与管道断电电位的关系(1) 试片的断电电位代表管道表面的面积与之相同、环境与之一致的涂层破损点电位。而管道的断电电位是多个防腐层缺陷点的综合电位，两者的含义不同。(2) 如果试片的断电电位满足规范指标要求，说明管道上比试片面积小的防腐层缺陷点也满足规范指标要求，但比试片面积大的防腐层缺陷点保护是否达标尚不能确定。(3) 裸露面积越大，断电电位越正。

• 站内、外阴极保护参数的分析

  ①如果站内阴极保护电源开启时,站外管道管地电位负向偏移说明管道受区域保护阳极电压场干扰。原因可能是:a.区域保护阳极靠近绝缘接头、绝缘接头性能下降、管道内有导电介质;b.外管道管地电位负向偏移是区域保护电流流入站外管道或地电位梯度提高所致。②解决问题的方案。当发现站外管道管地电位随着站内阴极保护电源的开启而负向偏移时,应进一步区分电位负向偏移是由于电流流入管道,还是由于地电位梯度提高所致。a.将站

• 牺牲阳极保护

  牺牲阳极保护牺牲阳极保护（英文名称sacrificial anode）又名牺牲阳极保护法；牺牲阳极的阴极保护法。是利用原电池的原理，防止金属腐蚀的方法。具体方法是将还原性强的金属作为保护较，与被保护的金属相连构成原电池，还原性强的金属将作为负极发生氧化还原反应而牺牲消耗，被保护的金属作为作为正极，免于被腐蚀。这种方法是消耗牺牲了作为阳极（原电池的负极）的金属，保护了阴极（原电池的正极）金属。因此称

• 阴极保护镁阳极的用途及适用范围

  阴极保护镁阳极的用途及适用范围目前,我国国内镁阳极的市场正在逐步扩大，消耗量也由1990年的200T增加到目前的3000T以上。从整体情况看，我国的镁阳极应用还处于起步阶段。镁作为一种新的阳极材料，已开始应用于有特殊要求的海洋工程保护方面，例如淡水中的船体和装载淡水的压载舱等。相信，作为新材料的镁阳极在船舶防腐蚀保护方面会得到越来越多的应用。镁合金牺牲阳极对一些特定条件下的油气油田开发及地下管道、