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Hybrid Petroleum Institute - Radiografía

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 Medición de espesores por Radiografía Digital 

 

Una radiografía es una imagen registrada en una placa o película fotográfica, o de forma digital (Radiología digital directa o indirecta) en una base de datos. La imagen se obtiene al exponer al receptor de imagen radiográfica a una fuente de [radiación] de alta energía, comúnmente rayos X o radiación gamma procedente de isótopos radiactivos (Iridio 192, Cobalto 60, Cesio 137, etc.). Al interponer un objeto entre la fuente de radiación y el receptor, las partes más densas aparecen con diferentes tonos dentro de una escala de grises, en función inversa a la densidad del objeto. Por ejemplo, si la radiación incide directamente sobre el receptor, se registra un tono negro.

 

Sus usos industriales pueden ser  la detección de defectos en materiales y soldaduras, tales como grietas, poros, "rebabas", etc.

 

La radiografía se usa para ensayar una variedad de productos, tales como objetos de fundición, objetos forjados y soldaduras. Los objetos a ensayar se exponen a rayos X o gamma y se procesa un film o se visualiza digitalmente. El personal de ensayos radiográficos instala, expone y procesa la película o digitalmente procesa las señales e interpreta las imágenes de acuerdo con códigos o especificaciones escritas.