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Coating process creates protective layer.

The primary function of Ultra-fast and Large-scale Boriding, developed by Argonne National Laboratory (Argonne, Ill.), Istanbul Technical University (Istanbul), and Bodycote Thermal Processing (Chicago), is to quickly convert the outer surfaces of metallic parts and components into a thick, hard boride layer, which can increase resistance to wear, abrasion, erosion, scuffing, and corrosion failures. The process increases surface hardness by factors of 3 to 10. The process can achieve a thick, uniform boride layer of more than 200 [micro]m in steels after treatment times of three to four hours.

The process is ideal for the treatment of iron and steel-based materials; it can also be used for the treatment of many non-ferrous metals and their alloys, intermetallics, cemented carbides, and cermets.

The ultrafast boriding is done in a borax-based molten salt electrolyte using an electrochemical cell. The parts are attached to the cathode of the cell. When the power source is turned on, borax undergoes a series of dissociative reactions; the fundamental mechanisms that result in boron reduction or deposition on the cathode (or work pieces) occur from a series of sequential reactions. The furnace can treat thousands of industrial components in minutes, without creating any gaseous emissions or solid and/or liquid wastes.

* Argonne National Laboratory,

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Title Annotation:Process Sciences Information Technologies
Publication:R & D
Article Type:Brief article
Geographic Code:1USA
Date:Sep 1, 2012
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