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  2. 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.

  3. Cathodic protection - Wikipedia

    en.wikipedia.org/wiki/Cathodic_protection

    Aluminum sacrificial anodes (light colored rectangular bars) mounted on a steel jacket structure. Zinc sacrificial anode (rounded object) screwed to the underside of the hull of a small boat. Cathodic protection (CP; / k æ ˈ θ ɒ d ɪ k / ⓘ) is a technique used to control the corrosion of a metal surface by making it the cathode of an ...

  4. Marine heat exchanger - Wikipedia

    en.wikipedia.org/wiki/Marine_heat_exchanger

    Sacrificial anodes are necessary in cooling systems to prevent galvanic corrosion. Anodes are often time made of Zinc and are replaced when they reach fifty percent wear. Shell and tube heat exchangers require tubes to be plugged upon the detection of a leak.

  5. 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

  6. HMS Samarang (1822) - Wikipedia

    en.wikipedia.org/wiki/HMS_Samarang_(1822)

    Sacrificial anodes made from iron attached to the copper sheathing of the hull below the waterline dramatically reduced the corrosion rate of the copper. However, a side effect of the cathodic protection was to increase marine growth. Copper, when corroding, releases copper ions which have an anti-fouling effect.

  7. Anode - Wikipedia

    en.wikipedia.org/wiki/Anode

    Sacrificial anodes are also generally used in tank-type water heaters. In 1824 to reduce the impact of this destructive electrolytic action on ships hulls, their fastenings and underwater equipment, the scientist-engineer Humphry Davy developed the first and still most widely used marine electrolysis protection system. Davy installed ...

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