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词条 Anti-corrosion
释义

  1. Protection from corrosion

  2. References

{{Multiple issues|{{Expert-subject|Metalworking|date=February 2011}}{{referenced|date=October 2009}}
}}Anti-corrosion refers to the protection of metal surfaces from corroding in high-risk (corrosive) environments.[1]

When metallic materials are put into corrosive environments, they tend to have chemical reactions with the air and/or water. The effects of corrosion become evident on the surfaces of these materials. For example, after putting a piece of iron into a corrosive atmosphere for an extended period, it starts rusting due to oxygen interaction with water on the surface of the piece of iron.[2]

Metal equipment lacking any preventive (anti-corrosive) measures may become rusted both inside and out, depending upon atmospheric conditions and how much of that equipment is exposed to the air. There are a number of methods for preventing corrosion, especially in marine applications. Anti-corrosion measures are of particular importance in environments where high humidity, mist, and salt are factors.[3]

Protection from corrosion

  • Anti-corrosion materials
    • Stainless steel
    • Electrogalvanized cold-rolled steel (SECC), a type of zinc-plated steel, used as a housing to protect electronic components[4]
    • Barrier coatings provide a consistent film that forms a chemically resistant barrier and blocks external factors from causing harm. [5]
    • Sacrificial coatings contain certain element (such as aluminum or zinc) which oxidize sacrificially to ensure the protected element remains corrosion free.[6]
  • Enclosure design: fully sealed enclosures (at least full IP65) to protect internal electronic components, used in highly salty and damp places
  • Painting treatments on the surface: Another way to protect metal housings from corrosion is by using anti-corrosive paint or powder coat on the metallic surface. The function of this coating is to act as a barrier that inhibits contact between chemical compounds or corrosive materials with the metal housing.
  • Surface treatments: formation by chemical reaction of a protective layer on the surface, such as Nitriding or Nitrocarburizing surface treatments. [7]
  • Surface plating: deposition of a corrosion-resistant layer, usually Nickel or Chrome, by various plating processes, such as electro-plating or electroless plating.

References

1. ^{{Cite web|title=What is corrosion resistance? |url=http://www.corrosionist.com/what_is_corrosion_resistance.htm |website=www.corrosionist.com |accessdate=2015-10-15 |deadurl=yes |archiveurl=https://web.archive.org/web/20160304112958/http://www.corrosionist.com/what_is_corrosion_resistance.htm |archivedate=2016-03-04 }}
2. ^{{Cite web|title = Engineering ToolBox|url = http://www.engineeringtoolbox.com |website = www.engineeringtoolbox.com.|accessdate = 2015-10-15}}
3. ^{{Cite web|title = Protective Coatings and Inorganic Anti Corrosion Pigments|url = http://www.astm.org/DIGITAL_LIBRARY/MNL/PAGES/MNL12208M.htm|website = www.astm.org|accessdate = 2015-10-15}}
4. ^{{Cite web|title = Electro Galvanized Steel {{!}} Rolled Steel Products « Rolled Steel Products|url = http://www.rolledsteel.com/electro-galvanized-steel/|website = www.rolledsteel.com|accessdate = 2015-10-15}}
5. ^{{Cite web|title = Anti corrosion coatings|url = http://www.spiperformancecoatings.com/solutions/anti-corrosion-coatings/|website = www.spiperformancecoatings.com|accessdate = 2016-09-07}}
6. ^{{Cite web|title = Corrosion Resistance - DECC Company|url = http://www.decc.com/corrosion_protection.php|website = www.decc.com|accessdate = 2015-10-15}}
7. ^{{Cite news|url=https://www.corrosionpedia.com/2/1513/prevention/surface-modification/nitriding-for-corrosion-and-wear-fatigue-resistance|title=Nitriding for Corrosion and Wear Fatigue Resistance|work=Corrosionpedia|access-date=2018-06-19|language=en}}

1 : Chemical processes

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