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GB/T 20504-2006Anodic oxide coatings and organic polymer coatings on aluminium and its alloys - Determination of image clarity (English PDF)

铝及铝合金阳极氧化阳极氧化膜影像清晰度的测定条标法

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Issued by

State Administration for Market Regulation, Standardization Administration of China

Level / Type

National · Recommended

Issue date

May 25, 2026

Implementation date

December 1, 2026

Scope

GB/T 20504-2006 is the English-translated version of 铝及铝合金阳极氧化阳极氧化膜影像清晰度的测定条标法.

GB/T 20504-2006 is the Chinese standard "Anodic oxide coatings and organic polymer coatings on aluminium and its alloys - Determination of image clarity". It was issued by State Administration for Market Regulation, Standardization Administration of China. Issued on 2026-05-25, in force from 2026-12-01.

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Document preview — GB/T 20504-2006

National Standard of the People's Republic of China

ICS: 25.220.20
Classification: H20

Issued by: State Administration for Market Regulation, Standardization Administration of China

[Preview only]
1 Scope
1.1 Overview
1.2 Specification
1.3 Consistency
2 Normative references
3 Terms and definitions
3.2 Abbreviations
3.3 Conventions
4 Information to be supplied to the electroplater
4.1 General
4.2 Related to the manufacturer
4.3 Related to the parent material
4.4 Common to all welding procedures
5 Service condition number
5.1 Cutting edge condition
6 Designation
7 Requirements
8 Range of Qualification
9 Test methods

1 Foreword

GB/T 20504-2006 was issued by State Administration for Market Regulation, Standardization Administration of China on 25 May 2026 and has been in force since 1 December 2026.

The GB/T prefix marks a recommended standard. It is not law in itself: it becomes binding when a contract names it, when a regulation or a mandatory standard refers to it, or when a producer declares conformity with it.

The document runs to 8 pages in English translation.

2 Scope Preview

GB/T 20504-2006 falls under ICS 25.220.20, in the field of manufacturing engineering.

This catalogue holds 2,509 other GB/T standards in that field.

In this catalogue, GB/T standards carry edition years from 1963 to 2026.

3 About this standard

Sector: National Standard (Recommended)

Issued by: State Administration for Market Regulation, Standardization Administration of China

English translation: about 8 pages (approximate)

Chinese original: about 10,136 characters

4 Related standards

Other editions:

GB/T 20504-2026 (later edition)

Standards on related subjects:

GB/T 22638.4-2016 — Test methods for aluminium and aluminium alloy foils—Part 4: Determination of surface wetting tension

GB/T 22638.3-2016 — Test methods for aluminium and aluminium alloy foils - Part 3: Determination of stickiness

GB/T 22638.2-2016 — Test methods for aluminium and aluminium alloy foils - Part 2: Determination of pinhole

GB/T 20503-2026 — Anodic oxide coatings and organic polymer coatings on aluminium and its alloys - Measurement of specular reflectance and specular gloss

GB/T 13671-2025 — Electrochemical test method for crevice corrosion of stainless steel

5 Classification and status

International classification (ICS): 25.220.20

Chinese Standard Classification (CCS): H 20

Prefix GB/T: recommended standard.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 8 pages — is available in the English PDF.

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