Difference between revisions of "Corrosion resistance"

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== Description ==
 
== Description ==
  
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The ability of a material to resist chemical changes due to degradative environmental effects, such as moisture and pollution.
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The ability of a metal to resist chemical changes due to oxidation.  Corrosion resistance can be increased by coating the metal surface with [[oil]], [[wax]], [[paint]], [[oxide]] layers, passive films, a more noble metal (plating), anti-corrosion treatments, or by controlling its exposure environment.  
  
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Some materials that can be used to inhibit [[corrosion]] include:
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* [[Vapor phase corrosion inhibitor]]: provides a corrosion resistant layer on the surface
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* [[Scavenger]]: removes pollutants and/or moisture and oxygen from the airs
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* [[Desiccant]]: removes moisture from the air
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Some anticorrosion treatments include:
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{| class="wikitable"
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|-
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! For  corrosion resistance on metals
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! Process
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! Substrates
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! Advantages
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! Disadvantages
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|-
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| Anodizing
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| Formation of protective oxide  layer; immersion in electrolytic solution
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| Non-ferrous metals, primarily  aluminum
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| Long-lasting, chemically  stable,, non-toxic, no dangerous by-products
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| Unsuitable for ferrous metals;  limited options for colors
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|-
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| Galvanizing
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| Immersion of metal in molten  zinc bath to produce protective zinc carbonate layer
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| Steel, bolts and nuts, air  ducts, trash cans
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| Highly stable, adheres tightly;  zinc coating actively covers scratches, cuts and dents after they occur
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| Expensive for large items; color  is dull gray
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|-
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| Electroplating  (electrodeposition)
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| Deposition of a thin layer of  one metal on the surface of another; both metal are placed in electrolytic  solution
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| Copper, nickel, gold, silver,  chrome, zinc tin, jewelry, ornaments;
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| Excellent corrosion resistance;  often increases in mechanical properties, can produce aesthetic appearance
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| Expensive; produces non-uniform  coating thicknesses; potentially toxic; solutions contain environmentally  harmful chemicals
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|-
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| Powder  Coating
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| An electrostatic process to  adhere powder-based substance onto a charged metal surface followed by heat  curing.
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| Metals, household appliances,  automobile parts
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| Coatings are durable with many  color options; no solvents are used thus no VOCs emissions
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| Requires spray booths and ovens,  difficult to achieve thin coatings
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|-
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| Paint  Coating
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| Application of liquid paint;  some types of polymers require mixing prior to application
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| Almost anything
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| Readily accessible; cost  effective; wide variety of options
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| Some paints contain toxic  elements and/or VOCs.; durability is lower than other coatings
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|}
 
== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==
  
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Korrosionbestândigkeit (Deut.); résistance à la corrosion (Fr.);
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Korrosionbestândigkeit (Deut.); résistance à la corrosion (Fr.); corrosion inhibitor
  
 
==Resources and Citations==
 
==Resources and Citations==
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* Corrosionpedia: [https://www.corrosionpedia.com/definition/286/coating-corrosion Coatinghttps://chansmachining.com/types-of-industrial-coating/] Accessed October 2024
 
* Theodore J. Reinhart, 'Glossary of Terms', ''Engineered Plastics'', ASM International, 1988
 
* Theodore J. Reinhart, 'Glossary of Terms', ''Engineered Plastics'', ASM International, 1988
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* Wikipedia: [https://en.wikipedia.org/wiki/Corrosion_inhibitor Corrosion inhibitor) Accessed July 2023
  
  
 
[[Category:Materials database]]
 
[[Category:Materials database]]

Latest revision as of 08:05, 16 October 2024

Description

The ability of a metal to resist chemical changes due to oxidation. Corrosion resistance can be increased by coating the metal surface with Oil, Wax, Paint, Oxide layers, passive films, a more noble metal (plating), anti-corrosion treatments, or by controlling its exposure environment.

Some materials that can be used to inhibit Corrosion include:

Some anticorrosion treatments include:

For corrosion resistance on metals Process Substrates Advantages Disadvantages
Anodizing Formation of protective oxide layer; immersion in electrolytic solution Non-ferrous metals, primarily aluminum Long-lasting, chemically stable,, non-toxic, no dangerous by-products Unsuitable for ferrous metals; limited options for colors
Galvanizing Immersion of metal in molten zinc bath to produce protective zinc carbonate layer Steel, bolts and nuts, air ducts, trash cans Highly stable, adheres tightly; zinc coating actively covers scratches, cuts and dents after they occur Expensive for large items; color is dull gray
Electroplating (electrodeposition) Deposition of a thin layer of one metal on the surface of another; both metal are placed in electrolytic solution Copper, nickel, gold, silver, chrome, zinc tin, jewelry, ornaments; Excellent corrosion resistance; often increases in mechanical properties, can produce aesthetic appearance Expensive; produces non-uniform coating thicknesses; potentially toxic; solutions contain environmentally harmful chemicals
Powder Coating An electrostatic process to adhere powder-based substance onto a charged metal surface followed by heat curing. Metals, household appliances, automobile parts Coatings are durable with many color options; no solvents are used thus no VOCs emissions Requires spray booths and ovens, difficult to achieve thin coatings
Paint Coating Application of liquid paint; some types of polymers require mixing prior to application Almost anything Readily accessible; cost effective; wide variety of options Some paints contain toxic elements and/or VOCs.; durability is lower than other coatings

Synonyms and Related Terms

Korrosionbestândigkeit (Deut.); résistance à la corrosion (Fr.); corrosion inhibitor

Resources and Citations

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