牺牲阳极阴极保护工程质量控制方法及措施

由于以钢管桩作桩基的码头具有承重大,承受水平荷载大等优点,得到了广泛的应用。但在海洋环境下,钢结构电化学腐蚀的问题非常突出。目前,海水中一般采用阴极保护方法来防止钢桩的电化学侵蚀。文章论述了天津港码头钢结构牺牲阳极阴极保护工程的施工方法和质量控制标准及措施。     

獭山港码头钢管桩牺牲阳极阴极保护效果的评定

獭山港某码头钢管桩采取防腐涂层和牺牲阳极阴极保护措施已10余a。通过对该码头钢管桩阴极保护系统防腐效果的检测，计算牺牲阳极的剩余使用寿命，测量保护电位和检查钢管桩腐蚀状况，并对牺牲阳极保护效果进行评价和分析。     

牺牲阳极阴极保护技术在码头桩基工程中的应用

结合黄海海域大丰港一期码头钢管桩桩基工程,在分析牺牲阳极阴极保护技术的原理和特点的基础上,论述牺牲阳极阴极保护系统的设计方法、施工技术以及后期检测维护,可供黄海海域相关钢结构防腐工程参考借鉴。     

洋山港一期工程阴极保护效果及剩余寿命评估

洋山港码头钢管桩防腐采用牺牲阳极阴极保护的方法,在一期已服役10余年后对其运行状况及剩余情况进行查检及寿命评估,通过电位测量、水下探摸、水下摄像、理论计算等方法对牺牲阳极阴极保护效果进行评价和分析。结果表明,洋山港码头一期钢管桩得到有效的阴极保护,阴极保护系统运行良好,但洋山港一期地处水流急、泥沙含量大的钱塘江下游入海口,牺牲阳极受冲刷严重,致使无法满足最初设计使用寿命要求。     

高效牺牲阳极阴极保护技术在天津港改扩建工程中的应用

码头钢结构防腐质量的好坏 ,直接影响码头钢结构完好性质量及使用年限。介绍了一种高效牺牲阳极阴极保护技术在码头钢管桩防腐中的应用     

高桩码头钢管桩牺牲阳极防腐设计及施工

港口工程结构采用阴极保护措施来防止钢管桩的电化学腐蚀,其中以牺牲阳极应用最为广泛。牺牲阳极的设计参数选取、阳极块选择、施工安装对于钢结构的防护起到决定性的作用,文中结合金塘大浦口集装箱码头1#泊位钢管桩防腐对牺牲阳极的设计和施工要点进行系统阐述。     

咸淡水钢管桩牺牲阳极设计与施工

依托安哥拉LNG码头钢管桩牺牲阳极阴极保护工程,重点介绍在咸淡水环境下牺牲阳极阴极保护的设计、施工与验收,并介绍该工程浅水区引桥钢管桩牺牲阳极的实施。为咸淡水和浅水区的特殊环境下牺牲阳极阴极保护的实施与验收提供了重要依据。     

海洋平台的阴极保护

本文介绍了海洋平台阴极保护的概论、原理及种类,着重叙述牺牲阳极保护系统在海洋平台上的应用,给出适用于各种不同海水及海泥环境中的牺牲阳极的成分,同时提出牺牲阳极优化设计的建议.     

丹东港牺牲阳极阴极保护效果的评定

通过对丹东港3号泊位钢桩阴极保护系统的检测，计算牺牲阳极的剩余使用寿命，对牺牲阳极阴极保护在我国北方港口的运用效果做出评定。     

牺牲阳极防腐蚀技术在天津港的应用

介绍在天津港27＃泊位改造工程中,采用高效长寿命铝合金牺牲阳极方案,解决海水全浸区及海泥区的钢管桩腐蚀问题。     

毛里塔尼亚友谊港阴极保护翻新工程

介绍了毛里塔尼亚友谊港引桥及码头钢管桩原防腐系统达到设计使用年限后,在传统防腐保护方法的基础上,对腐蚀最严重的区域引进了PTC新型包覆防蚀技术。通过采取涂料、PTC包覆和牺牲阳极阴极保护三种防腐方法的有效结合,解决了水位变动区和海洋浪溅区部位腐蚀严重部位的涂料修复困难问题,保证钢管桩具有更长久、更全面、更有效的保护效果。工程实施后,保护电位测量结果表明钢管桩防腐保护效果良好,该工程设计与施工合理。     

海洋环境中Al-xZn-xMg三元合金牺牲阳极稳定性和极化电位变化（英文）

In this paper, the effects of zinc(Zn) and magnesium(Mg) addition on the performance of an aluminum-based sacrificial anode in seawater were investigated using a potential measurement method. Anodic efficiency, protection efficiency, and polarized potential were the parameters used. The percentages of Zn and Mg in the anodes were varied from 2% to 8% Zn and 1% to 4% Mg. The alloys produced were tested as sacrificial anodes for the protection of mild steel in seawater at room temperature. Current efficiency as high as 88.36% was obtained in alloys containing 6% Zn and 1% Mg. The polarization potentials obtained for the coupled(steel/Al-based alloys) are as given in the Pourbaix diagrams, with steel lying within the immunity region/cathodic region and the sacrificial anodes within the anodic region. The protection offered by the sacrificial anodes to the steel after the 7th and 8th week was measured and protection efficiency values as high as 99.66% and 99.47% were achieved for the Al-6%Zn-1%Mg cast anode. The microstructures of the cast anodes comprise of intermetallic structures of hexagonal Mg3Zn2 and body-centered cubic Al2Mg3Zn3. These are probably responsible for the breakdown of the passive alumina film, thus enhancing the anode efficiency.     

牺牲阳极法的阴极保护系统优化设计及施工

海水环境下高桩码头钢管桩基础和钢筋混凝土结构的防腐设计和施工决定结构的使用寿命和造价,使用不当将造成结构提前破坏。通过牺牲阳极法的阴极保护系统在沙特延布工业港69#泊位的应用,分析高桩码头从钢管桩基础到钢筋混凝土面层全方位的阴极保护系统的设计原理,对比了铝基防腐块、锌网和锌块防腐3种防腐方式的适用性、性能参数和施工方法。实施过程中通过研究论证与多方案比选,将阴极保护系统进行优化,使其更安全可靠、施工便捷、后期维护方便、费用成本可控,取得良好效果。     

外加电流阴极保护技术在天津港北港池滚装码头的应用

在天津港滚装码头采用国际领先的计算机远程控制外加电流阴极防腐技术,保护钢结构和钢筋混凝土结构。文章描述了外加电流阴极保护技术的施工内容、质量控制要点,重点对试验数据进行了分析,为防腐工程提供借鉴。     

钢管桩阴极保护与Denso防腐蚀技术联合保护

在营口港某码头钢管桩出现腐蚀问题后,对钢管桩采取牺牲阳极阴极保护与Denso防腐蚀技术联合保护,详细介绍了Denso防腐蚀技术的施工工艺以及牺牲阳极阴极保护技术的设计过程。结果表明该结合技术的保护效果良好,可供相关水域的钢管桩保护借鉴参考。     

Sacrificial anode stability and polarization potential variation in a ternary Al-xZn-xMg alloy in a seawater-marine environment

In this paper, the effects of zinc (Zn) and magnesium (Mg) addition on the performance of an aluminum-based sacrificial anode in seawater were investigated using a potential measurement method. Anodic efficiency, protection efficiency, and polarized potential were the parameters used. The percentages of Zn and Mg in the anodes were varied from 2% to 8% Zn and 1% to 4% Mg. The alloys produced were tested as sacrificial anodes for the protection of mild steel in seawater at room temperature. Current efficiency as high as 88.36% was obtained in alloys containing 6% Zn and 1% Mg. The polarized potentials obtained for the coupled (steel/Al-based alloys) are as given in the Pourbaix diagrams, with steel lying within the immunity region/cathodic region and the sacrificial anodes within the anodic region. The protection offered by the sacrificial anodes to the steel after the 7th and 8th week was measured and protection efficiency values as high as 99.66% and 99.47% were achieved for the Al-6%Zn-1%Mg cast anode. The microstructures of the cast anodes comprise of intermetallic structures of hexagonal Mg₃Zn2 and body-centered cubic Al₂Mg₃Zn₃. These are probably responsible for the breakdown of the passive alumina film, thus enhancing the anode efficiency.     

天津港30万吨级原油码头外加电流阴极保护设计

针对天津港30万吨级原油码头所处的自然条件、码头的特性和相关技术参数,对钢管桩外加电流阴极保护系统的技术细节和安全措施进行详细描述和说明。对外加电流阴极保护系统在易燃易爆环境中的长期安全使用具有借鉴意义。     

牺牲阳极在天津港海水中的性能研究

通过室内试验和现场调查,研究了牺牲阳极在天津港海水中的性能和使用效果。室内试验研究表明,在Al-Zn-In-Cd、Al-Zn-In-Si和Al-Zn-In-Mg-Ti三种牺牲阳极中,Al-Zn-In-Mg-Ti阳极具有最佳的电流效率、最负的工作电位和开路电位。现场调查显示,Al-Zn-In-Mg-Ti阳极在天津港具有良好的使用效果。