GB/T 16921-2005: Metallic coatings -- Measurement of coating thickness -- X-ray spectrometric methods

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Scope

Warning. This standard does not cover the issue of personnel protection against
X-ray radiation. Information on this important aspect can be found in current
international and national standards and local regulations.
1.1 This standard specifies the method for measuring the thickness of metallic coatings
using X-ray spectroscopy.
1.2 The measurement method used in this standard is essentially a method for
determining the mass per unit area. If the density of the coating material is known, the
measurement result can also be expressed as the linear thickness of the coating layer.
1.3 This measurement method can simultaneously measure a three-layer coating system,
or simultaneously measure the thickness and composition of three components.
1.4 The actual measurement range for a given coating material depends primarily on
the energy of the characteristic X-ray fluorescence being analyzed and the permissible
measurement uncertainty; it varies depending on the instrumentation and operating
procedures used.

Basic Data

Standard ID	GB/T 16921-2005 (GB/T16921-2005)
Description (Translated English)	Metallic coatings -- Measurement of coating thickness -- X-ray spectrometric methods
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	A29
Classification of International Standard	25.220.20
Word Count Estimation	19,177
Date of Issue	2005-10-12
Date of Implementation	2006-04-01
Older Standard (superseded by this standard)	GB/T 16921-1997
Adopted Standard	ISO 3497-2000, IDT
Regulation (derived from)	Announcement of Newly Approved National Standards 2006 No. 1 (No. 88 overall)
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, China National Standardization Administration Committee
Summary	This standard specifies the application of X-ray spectroscopy methods to measure the thickness of the metal coating layer. This standard methods of measurement used in determination of mass per unit area are basically a way. If the density of the overlay material is known, the measurement results can also be linear thickness of said covering layer.