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Uses description Mill scale

Iron Platform, January 2014 Page 1 1. Background . This document does not intend to provide a full description of the uses of Mill scale (ferrous metal) [EC: 266-007-8] as such, but may be used as additional information and explanations on mill scale uses as reported in the REACH registration dossier.

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    Lincolns premium copper coated MIG wire, Super Arc L-56 is an excellent choice for welding on metals with a medium to high presence of mill scale. For Lincoln Electric 2-lb …

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    Mill scale, a dense magnetite layer produced on steel surfaces during fabrication, is subject to fracture and erosion during system operation. Because the exposed metal is anodic to the mill scale, these surface cracks are potential corrosion sites.

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    Oct 02, 2015 · Mill scale is formed at elevated temperatures and it consists of mainly the blue-gray magnetite, Fe3O4 as discussed above. The main catalyst for mill scale formation is oxygen.

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    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 bluish-black in color. It is usually less than 0.1 mm (0.0039 in) thick, and initially adheres to the steel surface and protects it from atmospheric corrosion provided no break occurs in this coating.

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    No mill scale whatsoever. Also, even though the copper had some oxygen, there are no big defects from the bubbles. The bubbles are very small.

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    The alloying metals form cations within the mill scale at about the alloying proportions* due to the almost instantaneous oxidation of freshly exposed metal at high temperature. Fe3O4 contains both Fe+2 and Fe+3, and is sometimes written FeO·Fe2O3. Ni+2 substitutes for Fe+2, Al+3 and Cr+3 substitute for Fe+3. Thus, (Fe,Ni)O·(Fe,Al,Cr)2O3.

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    May 25, 2017 · The amount of mill scale generated in a rolling mill depends on the type of the reheating furnace and on the practice of rolling adopted in the mill. It is generally in the range of 1 % to 3 % of the weight of the steel rolled. Mill scale mill scale is a layered and brittle material, composed of iron oxides with wustite as a predominant phase.

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    The method is specifically designed to work with stainless steel alloys with a minimum of 16% chromium as stated in the document. The procedure is as follows: Prepare test solution – Dissolve 8 grams of copper sulfate in 500 ml of distilled water in which 2 – 3 ml of sulfuric acid has been added.

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    Sodium sulfite is occasionally used to prevent oxygen corrosion. Although mill scale removal is not one of the purposes of alkaline cleaning, the addition of chelating agents may remove enough mill scale to eliminate the need for further chemical cleaning.

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    metal-rich near the base metal. Most oxygen-rich scale is readily soluble in common pickling acids, but the metal-rich scale may require acids aggressive to the base metal itself. For this reason, pickling is sometimes preceded by a preconditioning step, such as an alkaline salt bath, or scale removal by mechanical means, such as shot blasting.

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    oxygen furnace and the copper mould in the continuous casting machines. Part of the water is used for dust control in sinter feeds, slurrying and quenching iron ore and coal dust and slag in the blast furnace and as a solvent for acid in pickling, rinsing in coal rolling operation.

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    metal it is in contact with. It should be noted that mill scale is cathodicto steel and an electrical current can easily be produced between mill scale and the steel. Weld metal may also be anodic to the base metal, creating a corrosion cell when immersed. Additionally, a depletion of oxygen in

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