Method of measuring the degree of alloying of a galvanized steel

Details Method of measuring the degree of alloying of a galvanized steel Method of measuring the degree of alloying of a galvanized steel

1998-12-24

2000-10-24

Font, Frank G.

Optics: measuring and testing

Of light reflection

G01N 2155

Patent

active

061375837

ABSTRACT:
A method of measuring the degree of alloying of galvanized steel sheet through the use of laser beams includes the steps of directing a laser beam on a standard sample and reflecting and splitting the beam and detecting the intensity of specular reflection I.sub.0 (.alpha.) at an angle of reflection (.alpha.) and the intensity of scattering I.sub.0 (.beta.) at an angle of reflection (.beta.) to thus obtain the degree of alloying (X.sub.0) of the standard sample by the formula: ##EQU1## The above steps are repeated to obtain values I.sub.1 (.alpha.) and I.sub.2 (.beta.) to obtain a comparative degree of alloying (X.sub.1) of the standard sample using the above equation form. The arrangement of the laser, mirror and first and second beam splitters are corrected based on a comparison of the X.sub.0 and X.sub.1 values. The above steps are then repeated by directing the laser onto a galvanized steel sheet to obtain the degree of alloying (X.sub.2) of the galvanized steel sheet.

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