 | This article needs additional citations for
verification. (September 2018) |
Rouging is a form of corrosion found in stainless steel. [1] It can be due to iron contamination of the stainless steel surface due to welding of non-stainless steel for support columns, or other temporary means, which when welded off leaves a low chromium area. [2]
There are three classes of rouging: Class I, Class II, and Class III. [3]
Class I – stainless steel surface and the
Cr/Fe ratio[
clarification needed] of the metal surface beneath such deposits usually remain unaltered.
Class II – Iron particles originating in-situ on unpassivated or improperly passivated stainless steel surfaces. By their formation the Cr/Fe ratio of the metal surface is altered.
Class III – Iron oxide (or scale) which forms on surfaces in high temperature steam systems. The Cr/Fe ratio of the protective film is usually altered.
References
-
^ Rivera, Hadziselimovic, Lopolito (2017-02-15).
"Preventive and Corrective Maintenance for Rouge in Stainless-Steel Equipment". Equipment and Processing Report. Equipment and Processing Report-02-15-2017. 10 (2). Retrieved 2019-04-12.
{{ cite journal}}: CS1 maint: multiple names: authors list ( link) - ^ "Rouging". corrosion-doctors.org.
- ^ "Rouging of Stainless Steel in High-Purity Water", Corrosion: Environments and Industries, ASM International, 2006, pp. 15–22, doi: 10.31399/asm.hb.v13c.a0004103, ISBN 9781627081849
 | This corrosion-related article is a stub. You can help Wikipedia by expanding it. |
 | This article about a mechanical engineering topic is a stub. You can help Wikipedia by expanding it. |
| This article needs additional citations for
verification. (September 2018) |
Rouging is a form of corrosion found in stainless steel. [1] It can be due to iron contamination of the stainless steel surface due to welding of non-stainless steel for support columns, or other temporary means, which when welded off leaves a low chromium area. [2]
There are three classes of rouging: Class I, Class II, and Class III. [3]
Class I – stainless steel surface and the
Cr/Fe ratio[
clarification needed] of the metal surface beneath such deposits usually remain unaltered.
Class II – Iron particles originating in-situ on unpassivated or improperly passivated stainless steel surfaces. By their formation the Cr/Fe ratio of the metal surface is altered.
Class III – Iron oxide (or scale) which forms on surfaces in high temperature steam systems. The Cr/Fe ratio of the protective film is usually altered.
References
-
^ Rivera, Hadziselimovic, Lopolito (2017-02-15).
"Preventive and Corrective Maintenance for Rouge in Stainless-Steel Equipment". Equipment and Processing Report. Equipment and Processing Report-02-15-2017. 10 (2). Retrieved 2019-04-12.
{{ cite journal}}: CS1 maint: multiple names: authors list ( link) - ^ "Rouging". corrosion-doctors.org.
- ^ "Rouging of Stainless Steel in High-Purity Water", Corrosion: Environments and Industries, ASM International, 2006, pp. 15–22, doi: 10.31399/asm.hb.v13c.a0004103, ISBN 9781627081849
|
| This corrosion-related article is a stub. You can help Wikipedia by expanding it. |
|
| This article about a mechanical engineering topic is a stub. You can help Wikipedia by expanding it. |