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- Mill_scale abstract "Mill scale, often shortened to just scale, is the flaky surface of hot rolled steel, iron oxides consisting of iron(II) oxide (FeO), iron(III) oxide (Fe2O3), and iron(II,III) oxide (Fe3O4, magnetite). Mill scale is formed on the outer surfaces of plates, sheets or profiles when they are being produced by rolling red hot iron or steel billets in rolling mills. Mill scale is composed of iron oxides mostly ferric and is bluish black in color. It is usually less than 1 mm (0.039 in) thick and initially adheres to the steel surface and protects it from atmospheric corrosion provided no break occurs in this coating. Because it is electro-chemically cathodic to steel, any break in the mill scale coating will cause accelerated corrosion of steel exposed at the break. Mill scale is thus a boon for a while until its coating breaks due to handling of the steel product or due to any other mechanical cause. Mill scale is a nuisance when the steel is to be processed. Any paint applied over it is wasted since it will come off with the scale as moisture laden air get under it. Thus mill scale can be removed from steel surfaces by flame cleaning, pickling, or abrasive blasting, which are all tedious operations that waste energy. This is why shipbuilders used to leave steel delivered freshly rolled from mills out in the open to allow it to 'weather' until most of the scale fell off due to atmospheric action. Nowadays most steels mills can supply their produce with mill scale removed and steel coated with shop primers over which welding can be done safely.Mill scale generated in rolling mills will be collected and sent to sinter plant for recycling.".
- Mill_scale wikiPageID "22696307".
- Mill_scale wikiPageRevisionID "605824404".
- Mill_scale hasPhotoCollection Mill_scale.
- Mill_scale subject Category:Arts.
- Mill_scale subject Category:Metallurgy.
- Mill_scale subject Category:Metalworking_terminology.
- Mill_scale subject Category:Oxides.
- Mill_scale subject Category:Steelmaking.
- Mill_scale type Abstraction100002137.
- Mill_scale type Chemical114806838.
- Mill_scale type Compound114818238.
- Mill_scale type Material114580897.
- Mill_scale type Matter100020827.
- Mill_scale type Oxide114971519.
- Mill_scale type Oxides.
- Mill_scale type Part113809207.
- Mill_scale type PhysicalEntity100001930.
- Mill_scale type Relation100031921.
- Mill_scale type Substance100019613.
- Mill_scale comment "Mill scale, often shortened to just scale, is the flaky surface of hot rolled steel, iron oxides consisting of iron(II) oxide (FeO), iron(III) oxide (Fe2O3), and iron(II,III) oxide (Fe3O4, magnetite). Mill scale is formed on the outer surfaces of plates, sheets or profiles when they are being produced by rolling red hot iron or steel billets in rolling mills. Mill scale is composed of iron oxides mostly ferric and is bluish black in color.".
- Mill_scale label "Abbrand (Metallurgie)".
- Mill_scale label "Hamerslag".
- Mill_scale label "Mill scale".
- Mill_scale label "Zgorzelina (zendra)".
- Mill_scale label "Окалина".
- Mill_scale sameAs Abbrand_(Metallurgie).
- Mill_scale sameAs Hamerslag.
- Mill_scale sameAs Zgorzelina_(zendra).
- Mill_scale sameAs m.04y79g8.
- Mill_scale sameAs Q1844333.
- Mill_scale sameAs Q1844333.
- Mill_scale sameAs Mill_scale.
- Mill_scale wasDerivedFrom Mill_scale?oldid=605824404.
- Mill_scale isPrimaryTopicOf Mill_scale.