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  2. Galvanic anode - Wikipedia

    en.wikipedia.org/wiki/Galvanic_anode

    In brief, corrosion is a chemical reaction occurring by an electrochemical mechanism (a redox reaction). [1] During corrosion of iron or steel there are two reactions, oxidation (equation 1), where electrons leave the metal (and the metal dissolves, i.e. actual loss of metal results) and reduction, where the electrons are used to convert oxygen and water to hydroxide ions (equation 2): [2]

  3. Galvanic corrosion - Wikipedia

    en.wikipedia.org/wiki/Galvanic_corrosion

    Improper use of aluminium in contact with stainless steel had caused rapid corrosion in the presence of salt water. [13] The electrochemical potential difference between stainless steel and aluminium is in the range of 0.5 to 1.0 V, depending on the exact alloys involved, and can cause considerable corrosion within months under unfavorable ...

  4. Corrosion - Wikipedia

    en.wikipedia.org/wiki/Corrosion

    Concentration cells can form in the deposits of corrosion products, leading to localized corrosion. Accelerated low-water corrosion (ALWC) is a particularly aggressive form of MIC that affects steel piles in seawater near the low water tide mark. It is characterized by an orange sludge, which smells of hydrogen sulfide when treated with acid.

  5. Cathodic protection - Wikipedia

    en.wikipedia.org/wiki/Cathodic_protection

    Newly issued USDOT regulation Title 49 CFR 192.112, in the section for Additional design requirements for steel pipe using alternative maximum allowable operating pressure requires that "The pipe must be protected against external corrosion by a non-shielding coating" (see coatings section on standard). Also, the NACE SP0169:2007 standard ...

  6. Galvanic series - Wikipedia

    en.wikipedia.org/wiki/Galvanic_series

    The unshaded bars indicate the location on the chart of those steels when in acidic/stagnant water ( like in the bilge ), where crevice-corrosion happens. Notice how the *same* steel has much different galvanic-series location, depending on the electrolyte it's in, making prevention of corrosion .. more difficult.

  7. Pitting corrosion - Wikipedia

    en.wikipedia.org/wiki/Pitting_corrosion

    In the case of pitting corrosion of iron, or carbon steel, by atmospheric oxygen dissolved in acidic water (pH < 7) in contact with the metal exposed surface, the reactions respectively occurring at the anode and cathode zones can be written as follows: Anode: oxidation of iron: 2 (Fe → Fe 2+ + 2e −)

  8. Microbial corrosion - Wikipedia

    en.wikipedia.org/wiki/Microbial_corrosion

    Mansouri, H., Alavi, S. A., & Fotovat, M. "Microbial Influenced Corrosion of Corten Steel Compared to Carbon Steel and Stainless Steel in Oily Waste Water by Pseudomonas Aeruginosa". JOM, 1–7. Madhusudan P Dabhole and K N Joishy. 2003. "Mild steel corrosion reduction in water by uptake of dissolved oxygen by Rhodotorula mucilaginosa".

  9. Stress corrosion cracking - Wikipedia

    en.wikipedia.org/wiki/Stress_corrosion_cracking

    This limits the usefulness of austenitic stainless steel for containing water with higher than a few parts per million content of chlorides at temperatures above 50 °C (122 °F); mild steel cracks in the presence of alkali (e.g. boiler cracking and caustic stress corrosion cracking) and nitrates;