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GB/T 33373-2025Corrosion control - Electrochemical protection - Terminology (English PDF)

腐蚀控制　电化学保护　术语

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 31, 2025

Implementation date

May 1, 2026

Scope

GB/T 33373-2025 is the English-translated version of 腐蚀控制　电化学保护　术语.

GB/T 33373-2025 is the Chinese standard "Corrosion control - Electrochemical protection - Terminology". Its scope clause reads: This document defines the corrosion basis, electrochemical basis, cathodic protection, anodic protection, and stray current interference in corrosion control electrochemical protection.

Terms and definitions related to exclusion, detection and monitoring, and electrochemical protection management. This document applies to research, teaching, design, production, manufacturing, installation, construction, testing, commissioning, and operation related to corrosion control and electrochemical protection.

Maintenance, evaluation, and other activities. Its clauses include corrosion basics.

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Document preview — GB/T 33373-2025

National Standard of the People's Republic of China

ICS: 25.220.99
Classification: A 29
Replacing: GB/T 33373-2016

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Corrosion Basics
4.Fundamentals of Electrochemistry
5.Cathodic protection
6 Anode protection
7.Stray Current Interference and Elimination
8.Detection and Monitoring
9 Electrochemical Protection Management
References

1 Scope

This document defines the corrosion basis, electrochemical basis, cathodic protection, anodic protection, and stray current interference in corrosion control electrochemical protection.

Terms and definitions related to exclusion, detection and monitoring, and electrochemical protection management.

This document applies to research, teaching, design, production, manufacturing, installation, construction, testing, commissioning, and operation related to corrosion control and electrochemical protection.

Maintenance, evaluation, and other activities.

2 Normative references

This document has no normative references.

3 Corrosion Basics

3.1 corrosion

Damage or deterioration of materials caused by environmental factors.

Note. Environmental effects include physical, chemical, and electrochemical effects.

[Source. GB/T 41323-2022, 3.1.1]

3.2 corrosion source

The collective term for all factors that cause or lead to corrosion.

[Source. GB/T 33314-2023, 3.2]

3.3

The general term for all media that directly participate in the corrosion reaction.

Note. The medium includes hydrogen ions in the acid, oxygen in the water, ferric ions, etc.

[Source. GB/T 41323-2022, 3.1.3]

3.4

The general term for all operating conditions that affect corrosion reactions.

[Source. GB/T 41323-2022, 3.1.4]

3.5 corrosion rate

The corrosion effect of metals per unit time.

Note. The method of expressing corrosion rate depends on the technical system and the type of corrosion effect. For example, it is usually expressed as the increase in corrosion depth per unit time or per unit

The corrosion effect is expressed as the mass of metal transformed into corrosion products per unit area per unit time. The corrosion effect varies over time and is not necessarily the same at all points on the surface.

Therefore, corrosion rate reports typically include the type, temporal relationship, and location of the corrosion effect.

[Source. GB/T 10123-2022, 3.12]

GB/T 37309 | GB/T 35505 | GB/T 31554 | GB/T 33378 | GB/T 33383 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 25 pages — is available in the English PDF.

Referenced standards

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Editions of GB/T 33373

Edition	Title	Revision	Status
GB/T 33373-2025	Corrision control - Electrochemical protection - Terminology	current edition	Current
GB/T 33373-2016	Anti-corrosion -- Electrochemical protection -- Terminology	previous edition	In force

This page sells the current edition, GB/T 33373-2025. Earlier editions are listed for reference only.

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