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GB/T 45340-2025: Metallic and other non-organic coatings - Measurement of coating thicknesses - Fizeau multiple-beam interferometry method
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| GB/T 45340-2025 | English | 279 |
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Metallic and other non-organic coatings - Measurement of coating thicknesses - Fizeau multiple-beam interferometry method
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GB/T 45340-2025
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Basic data | Standard ID | GB/T 45340-2025 (GB/T45340-2025) | | Description (Translated English) | Metallic and other non-organic coatings - Measurement of coating thicknesses - Fizeau multiple-beam interferometry method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A29 | | Classification of International Standard | 25.220.20; 25.220.40 | | Word Count Estimation | 14,175 | | Date of Issue | 2025-02-28 | | Date of Implementation | 2025-09-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 45340-2025: Metallic and other non-organic coatings - Measurement of coating thicknesses - Fizeau multiple-beam interferometry method
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GB/T 45340-2025 English version. Metallic and other non-organic coatings - Measurement of coating thicknesses - Fizeau multiple-beam interferometry method
ICS 25.220.20;25.220.40
CCSA29
National Standard of the People's Republic of China
Metal and other inorganic coatings
Thickness measurement by Fizeau multi-beam interferometry
(ISO 3868.1976, MOD)
Released on 2025-02-28
2025-09-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Principle 2
5 Equipment 2
6 Factors affecting measurement accuracy 2
6.1 Reflective Covering 2
6.2 Step shape 3
6.3 Reading accuracy 4
6.4 Surface flatness 4
6.5 Step clarity 4
6.6 Roughness 4
6.7 Cleanliness 4
6.8 Step preparation 4
7 Calibration 4
8 Detection Step 4
8.1 Step preparation 4
8.2 Measurement Procedure 5
9 Measurement accuracy 7
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document is modified from ISO 3868.1976 “Measurement of coating thickness of metallic and other inorganic coatings—Fizeau multi-beam interferometry”
Law".
This document has the following structural adjustments compared to ISO 3868.1976.
--- Chapter 4 corresponds to Chapter 2 of ISO 3868.1976;
--- Chapter 5 corresponds to Chapter 4 of ISO 3868.1976;
--- Chapter 6 corresponds to Chapter 5 of ISO 3868.1976;
--- Chapter 7 corresponds to Chapter 6 of ISO 3868.1976;
--- Chapter 8 corresponds to Chapter 7 of ISO 3868.1976, 8.1.2 corresponds to 7.1.1 of ISO 3868.1976, 8.1.3 corresponds to
7.1.2, 8.2 in ISO 3868.1976 correspond to 7.2, 7.2.1 to 7.2.5 in ISO 3868.1976;
--- Chapter 9 corresponds to Chapter 8 of ISO 3868.1976.
The technical differences between this document and ISO 3868.1976 and their reasons are as follows.
--- Increased the scope of application (see Chapter 1);
--- Added normative references GB/T 3138 and GB/T 12334 (see Chapter 3) to adapt to my country's technical conditions;
--- Changed the definitions of test eyepiece, scale units and indicator lines (see 3.1, 3.2, 3.5, 3.1, 3.2, 3.5 of ISO 3868.1976)
3.5) to adapt to my country's technical conditions;
--- The introductory words on factors affecting thickness measurement accuracy have been deleted to adapt to my country's technical conditions;
--- Changed the reading accuracy requirements (see 6.3, 5.3 of ISO 3868.1976) to adapt to my country's technical conditions;
--- Changed the surface flatness requirements (see 6.4, 5.4 of ISO 3868.1976) to adapt to my country's technical conditions;
--- Changed the step clarity requirements (see 6.5, 5.5 of ISO 3868.1976) to adapt to my country's technical conditions;
--- The cleanliness requirements (see 6.7, 5.7 of ISO 3868.1976) have been changed to adapt to my country's technical conditions;
--- Added general rules for step preparation (see 8.1.1) to adapt to my country's technical conditions.
The following editorial changes were made to this document.
--- Delete Notes 1 and 2 of 7.1.2.3 of ISO 3868.1976.
This document was proposed by the China Machinery Industry Federation.
This document is under the jurisdiction of the National Technical Committee for Standardization of Metallic and Non-metallic Coverings (SAC/TC57).
This document was drafted by. Wuhan Institute of Materials Protection Co., Ltd. of China Machinery Engineering Academy Group, Chongqing Changan Automobile Co., Ltd.,
Dongfang Steam Turbine Co., Ltd. of Dongfang Electric Corporation, Zhejiang Metallurgical Research Institute Co., Ltd., Hunan Yongsheng New Materials Co., Ltd., Zhejiang
Fangquan Automotive Standard Parts Co., Ltd., Hunan Tianfu New Materials Co., Ltd., and Ningbo Yibin Electronic Technology Co., Ltd.
The main drafters of this document are. Duan Haitao, Jia Dan, Huang Ping, Wang Wei, Zhou Xialiang, Tu Jiesong, Zeng Chao, Gong Xiufang, Xu Qunfei, Fang Ruihai,
Sun Youbei, Li Xuemei, Dong Qibao, Xiong Junfeng.
Metal and other inorganic coatings
Thickness measurement by Fizeau multi-beam interferometry
1 Scope
This document describes the Fizeau multi-beam interferometry method for the measurement of coating thickness of metals and other inorganic coatings.
This document applies to the use of Fizeau multi-beam interferometry to measure the maximum thickness of metals and other inorganic coatings with a maximum reflectivity of less than 2 μm.
Measurement of coating thickness.
This document is not applicable to the measurement of enamel type coverings.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 3138 Terminology for surface treatment of metals and other inorganic coatings
GB/T 12334 Definitions and general rules for thickness measurement of metals and other non-organic coatings
3 Terms and definitions
The terms and definitions defined in GB/T 3138, GB/T 12334 and the following apply to this document.
3.1
micrometer eyepiece filarmicrometereyepiece
A device used to observe and measure images.
Note. It consists of an adjustable lens, an indicator line that moves with the rotation of the hand wheel, and a series of count lines across the field of view.
3.2
filarunits
The scale on the micrometer control device.
Note. Proportional to the unit of length.
3.3
Fizeauplate
An optical flat plate with a smooth surface, high reflectivity and low absorption.
3.4
Interference fringes
Dark lines formed by interference of light waves.
3.5
Hairlines
A thin wire inside a micrometer eyepiece that moves as the handwheel is turned.
Note. Used to measure the spacing and offset of interference fringes.
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