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  2. Cathodic protection - Wikipedia

    en.wikipedia.org/wiki/Cathodic_protection

    Effectiveness of cathodic protection (CP) systems on steel pipelines can be impaired by the use of solid film backed dielectric coatings such as polyethylene tapes, shrinkable pipeline sleeves, and factory applied single or multiple solid film coatings. This phenomenon occurs because of the high electrical resistivity of these film backings. [68]

  3. Galvanic anode - Wikipedia

    en.wikipedia.org/wiki/Galvanic_anode

    A galvanic anode, or sacrificial anode, is the main component of a galvanic cathodic protection system used to protect buried or submerged metal structures from corrosion. They are made from a metal alloy with a more "active" voltage (more negative reduction potential / more positive oxidation potential ) than the metal of the structure.

  4. Sacrificial metal - Wikipedia

    en.wikipedia.org/wiki/Sacrificial_metal

    A sacrificial metal is a metal used as a sacrificial anode in cathodic protection that corrodes to prevent a primary metal from corrosion or rusting. [1] It may also be used for galvanization. Equation

  5. Galvanic corrosion - Wikipedia

    en.wikipedia.org/wiki/Galvanic_corrosion

    Galvanizing with zinc protects the steel base metal by sacrificial anodic action. Cathodic protection uses one or more sacrificial anodes made of a metal which is more active than the protected metal. Alloys of metals commonly used for sacrificial anodes include zinc, magnesium, and aluminium. This approach is commonplace in water heaters and ...

  6. Anodic protection - Wikipedia

    en.wikipedia.org/wiki/Anodic_protection

    An anodic protection system includes an external power supply connected to auxiliary cathodes and controlled by a feedback signal from one or more reference electrodes. [3] Careful design and control is required when using anodic protection for several reasons, including excessive current when passivation is lost or unstable, leading to ...

  7. Anode - Wikipedia

    en.wikipedia.org/wiki/Anode

    Sacrificial anodes mounted "on the fly" for corrosion protection of a metal structure. In cathodic protection, a metal anode that is more reactive to the corrosive environment than the metal system to be protected is electrically linked to the protected system. As a result, the metal anode partially corrodes or

  8. Pin brazing - Wikipedia

    en.wikipedia.org/wiki/Pin_brazing

    Within a cathodic protection system there are a multitude of connection requirements for anode cables, measuring posts etc., being extremely versatile, the pin brazing system is ideally suited to this. Attachments can be made vertically, horizontally or even overhead.

  9. Corrosion engineering - Wikipedia

    en.wikipedia.org/wiki/Corrosion_engineering

    Impressed current cathodic protection has also been used. [40] Likewise sacrificial anode cathodic protection is also used. [41] Since chlorides vastly accelerate corrosion, ballast tanks of marine vessels are particularly susceptible. [42]

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