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Unlocking the Mystery of Cathodic Protection for Water Systems

机译：揭开水系统阴极保护的神秘面纱

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摘要

In today's world water utilities should not accept the myth that water wells, treatment equipment,rnstorage tanks, and piping systems have a limited life caused by corrosion. Technology exists torndesign or construct these structures so they can remain in service almost indefinitely withoutrnexperiencing corrosion in the areas in contact with soil or water. Cathodic protection is therntechnology that allows this phenomenon to occur.rnThis paper explores corrosion and its prevention through the use of cathodic protection. Itrndefines the principles of cathodic protection and explains in a simplified way how cathodicrnprotection can mitigate corrosion. It should eliminate the misunderstandings about therncomplexity and perceived expense of the installation of cathodic protection systems. Cathodicrnprotection is a proven technique for mitigating corrosion. There is nothing mysterious or crypticrnrelated to diminishing corrosion on metallic structures by utilizing this technology.rnThe prevention of corrosion with cathodic protection is not new; the technology has existed forrnover 150 years. In 1824, Sir Humphrey Davy used cathodic protection to prevent corrosion ofrnBritish naval ships. He did this by attaching zinc blocks to protect the copper sheathing on thernhulls of the naval vessels. From that time to today, metals have been protected against corrosionrnby the use of cathodic protection.rnDuring the 1970s the United States Congress passed a law requiring cathodic protection tornprevent failures on pipelines carrying hazardous materials and natural gas. In the 1980srnCongress passed another law requiring cathodic protection on underground fuel storage tanks.rnIf cathodic protection systems are properly installed and maintained, virtually all corrosion canrnbe eliminated in the metallic areas of the structure in contact with the soil or water. No utility orrncompany operating pipelines, water wells, and ground or elevated water tanks should accept thernfact that these structures "wear out", corrode, and fail. With today's technology, these types ofrnfailures can and should be prevented. Economic analyses of cathodic protection programs atrnEast Bay Municipal Utility District and Marin Municipal Water District (both in California)rnindicate benefit/cost ratios in the 7:1 to 8.5:1 range. These clearly indicate the benefit to waterrnutilities of using cathodic protection to mitigate external corrosion.rnThe basic principles and types of corrosion that affect water production, transmission, andrndistribution systems will be discussed briefly so the methods employed to cathodically protectrnthese structures from corrosion can be thoroughly understood. The major portion of the session
机译：在当今世界，水务公司不应接受这样的神话：水井，处理设备，储水罐和管道系统的寿命有限，是由腐蚀引起的。设计或建造这些结构的技术存在，因此它们几乎可以无限期地使用，而不会在与土壤或水接触的区域遭受腐蚀。阴极保护是使这种现象发生的技术。本文探讨了通过使用阴极保护进行腐蚀及其预防的方法。它定义了阴极保护的原理，并以简化的方式说明了阴极保护如何减轻腐蚀。它应消除对安装阴极保护系统的复杂性和感知费用的误解。阴极保护是一种减轻腐蚀的成熟技术。利用这种技术，减少金属结构的腐蚀并没有什么神秘或神秘的含义。该技术已经存在150多年了。 1824年，汉弗莱·戴维爵士使用阴极保护来防止腐蚀英国海军舰船。他通过安装锌块来保护海军舰船外壳上的铜护套来做到这一点。从那时到今天，金属一直通过使用阴极保护来防止腐蚀。在1970年代，美国国会通过了一项法律，要求阴极保护可防止运输有害材料和天然气的管道发生故障。在1980年代，国会通过了另一项法律，要求对地下储油罐进行阴极保护。如果正确安装和维护阴极保护系统，几乎可以消除与土壤或水接触的结构金属区域的所有腐蚀。公用事业公司或运营中的管道，水井，地下水箱或高架水箱均不应接受这些结构“磨损”，腐蚀和失效的事实。使用当今的技术，可以并且应该避免这些类型的故障。东湾市政公用事业区和马林市政供水区（均在加利福尼亚州）的阴极保护计划的经济分析表明，收益/成本比在7：1至8.5：1的范围内。这些清楚地表明使用阴极保护来减轻外部腐蚀对水的实用性。将简要讨论影响水生产，传输和分配系统的腐蚀的基本原理和类型，以便可以彻底了解对这些结构进行阴极保护的方法。 。会议的主要部分

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  • 来源
  • 会议地点 Cleveland OH(US);Cleveland OH(US);Cleveland OH(US)
  • 作者

    James T. Lary; Vice President;

  • 作者单位

    Corrpro Companies, Inc., 1090 Enterprise Drive, Medina, OH 44256, 330-723-5082 (x215),Fax: 330-723-0244, jlary@corrpro.com;

    Corrpro Companies, Inc., 1090 Enterprise Drive, Medina, OH 44256, 330-723-5082 (x215),Fax: 330-723-0244;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 管道设备;管道运输;
  • 关键词

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