Coinage material and process for production thereof

Details Coinage material and process for production thereof Coinage material and process for production thereof

A - Human Necessities

44

C

A44C 21/00 (2006.01) C23C 10/02 (2006.01) C23C 28/02 (2006.01) G07D 5/08 (2006.01)

Patent

CA 2214613

A coinage material comprises a ferritic blank, for example of mild steel, which has been surface-treated with an austenite-forming element such as nickel or manganese, and which has chromium diffused into the surface, such that a specific, marked difference, for example in electrical conductivity and/or magnetic permeability, which is electronically detectable exists between the surface and the interior. The coinage material may therefore be validated electronically using suitable detection means.

Matériau de frappe de monnaie comprenant un flanc ferritique, par exemple de l'acier doux, dont la surface a été traitée au moyne d'un élément austénitisant comme du nickel ou du manganèse, et sur laquelle surface on diffuse du chrome de façon à obtenir une différence spécifique notable, en conductivité électrique ou en perméabilité magnétique. Cette différence entre la surface et l'intérieur du matériau de frappe peut être détectée électroniquement. Le matériau de frappe de monnaie peut ainsi être vérifié électroniquement au moyen de dispositifs de détection appropriés.

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