Method and device for the non destructive determination of the thickness of the iron-tin intermediate layer of electrolytically tinned sheet metal

Abstract

Abstract 1. Method for the non-destructive determination of the thickness of the iron-tin intermediate layer on electrolytically-tinned sheet steel by means of X-ray or gamma-ray radiation, wherein the radiation issuing from the sheet is measured on the same side of the sheet as the one which is irradiated, characterized in that, in the measurement, an energy is selected for the incident radiation which is higher than 7.111 keV which has a constant magnitude and the measuring is effected at an angle which lies between 6 to 20 degrees for the incident beam and for the beam issuing at the same side of the sheet, wherein the angle lies between the beam and the sheet surface or, with a curved surface, between the tangent and the beam, and moreover the measured values are taken simultaneously in the energydispersive mode from the fluorescence radiation of the iron and from one or more of the other enery regions of the diffracted beam, so that the measured values of the fluorescence radiation are representative of the thickness of the tin layer and the values of the iron-tin intermediate layer are computed from the other measured values with reference to the values for the thickness of the tin layer.

Inventors

• 👤 Hermann Josef Prof. Dr. Rer. Nat. Kopineck
• 👤 Wolfgang Dr. Dipl.-Phys. Böttcher
• 👤 Albrecht Dipl.-Phys. Maurer

Bibliographic Details