ISO 3543-1981 rus PDF

Full title and description

ISO 3543:1981 — Metallic and non‑metallic coatings — Measurement of thickness — Beta backscatter method. (The user query "St ISO 3543-1981 rus" likely refers to this 1981 ISO standard; the original ISO publication language is English and French.)

Abstract

This standard specifies a non‑destructive method for measuring the thickness of metallic and non‑metallic coatings using the beta backscatter technique. The method uses backscattered beta radiation from a radioactive source to relate measured signal to coating thickness (or mass per unit area), and is applicable when the coating and the substrate have sufficiently different atomic (or equivalent atomic) numbers.

General information

• Status: Withdrawn / Cancelled (replaced by a later edition).
• Publication date: 1981 (Edition 1, published July 1981).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.220.20 (Surface treatment); 25.220.40 (Metallic coatings).
• Edition / version: Edition 1 (1981).
• Number of pages: 9 pages (original publication).

Scope

ISO 3543:1981 defines the beta backscatter measurement technique for determining coating thickness on metallic and non‑metallic substrates. It covers the principle of measurement, the relationship between backscattered beta intensity and coating thickness, calibration procedures, limitations related to coating/substrate composition (atomic number difference), and safety considerations arising from the use of radioactive sources. The 1981 edition was later superseded by ISO 3543:2000, which consolidates and updates the method.

Key topics and requirements

• Principle of beta backscatter: relation of backscattered beta intensity to coating/substrate atomic numbers and thickness.
• Instrumentation: beta backscatter gauges (sealed radioactive sources) and detector characteristics.
• Calibration: use of reference standards or calibration curves relating signal to thickness or mass per area.
• Material considerations: requirement that coating and substrate differ sufficiently in atomic (or equivalent atomic) number for the method to be valid.
• Limitations and measurement range: accuracy depends on coating type, thickness range and substrate/composition effects.
• Radiation safety: handling and regulatory requirements for instruments containing radioactive sources.

Typical use and users

Routine and spot-check thickness measurements in plating, galvanizing, electroplating, anodizing and decorative/coating applications; quality control and inspection laboratories; instrument manufacturers and calibration houses; engineers specifying or verifying coating acceptance criteria. Users must be aware of radiation‑safety regulations when operating beta backscatter equipment.

Related standards

Key related or complementary standards include the later edition ISO 3543:2000 (which revises the 1981 edition), methods for magnetic (ISO 2178) and eddy‑current/eddy‑current amplitude methods (ISO 2360), and broader guidance on selection of coating‑thickness measurement techniques (examples: ISO 3882). These standards cover alternative or complementary non‑destructive thickness measurement techniques and selection criteria.

Keywords

beta backscatter, coating thickness, non‑destructive measurement, calibration, radioactive source, metallic coatings, non‑metallic coatings, ISO 3543.

FAQ

Q: What is this standard?

A: ISO 3543:1981 is an International Standard that specifies a beta backscatter method for non‑destructive measurement of coating thickness on metallic and non‑metallic substrates.

Q: What does it cover?

A: It covers the measurement principle, instrumentation, calibration procedures, limitations related to coating/substrate composition (atomic number differences), and radiation‑safety considerations for beta backscatter gauges. The method is intended for cases where the coating and substrate have sufficiently different atomic (or equivalent atomic) numbers.

Q: Who typically uses it?

A: Quality control and inspection laboratories, plating and coating process engineers, test laboratories, instrument manufacturers and calibration laboratories involved in measuring and specifying coating thickness. Users handling beta backscatter instruments must comply with applicable radiation‑safety regulations.

Q: Is it current or superseded?

A: ISO 3543:1981 has been withdrawn and was superseded by ISO 3543:2000 (the later edition updates and replaces the 1981 text). For current practice, consult ISO 3543:2000 (and any subsequent corrigenda or confirmations).

Q: Is it part of a series?

A: It sits within the family of ISO surface‑treatment / coating measurement standards developed by ISO/TC 107. Other related standards cover magnetic methods (ISO 2178), eddy‑current methods (ISO 2360, ISO 21968), and selection/performance guidance (e.g., ISO 3882).

Q: What are the key keywords?

A: Beta backscatter; coating thickness; non‑destructive; calibration; radioactive gauge; metallic coatings; non‑metallic coatings; ISO 3543.