Difference between revisions of "Corrosion resistance"

From CAMEO
Jump to navigation Jump to search
m (Text replace - "== Authority ==" to "== Sources Checked for Data in Record ==")
 
(6 intermediate revisions by the same user not shown)
Line 1: Line 1:
 
== Description ==
 
== Description ==
  
−
The ability of a material to resist chemical changes due to degradative environmental effects, such as moisture and pollution.
+
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:
 +
 +
* [[Vapor phase corrosion inhibitor]]: provides a corrosion resistant layer on the surface
 +
* [[Scavenger]]: removes pollutants and/or moisture and oxygen from the airs
 +
* [[Desiccant]]: removes moisture from the air
 +
 +
Some anticorrosion treatments include:
 +
{| class="wikitable"
 +
|-
 +
! 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 ==
 
== Synonyms and Related Terms ==
  
−
Korrosionbestândigkeit (Deut.); résistance à la corrosion (Fr.);
+
Korrosionbestândigkeit (Deut.); résistance à la corrosion (Fr.); corrosion inhibitor
−
 
 
−
== Sources Checked for Data in Record ==
 
  
 +
==Resources and Citations==
 +
* 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
−
 
+
* 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

Retrieved from "https://cameo.mfa.org/index.php?title=Corrosion_resistance&oldid=99666"