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GB/T 12466-2019Terminology of corrosion and protection for ship and marine engineering (English PDF)

船舶及海洋工程腐蚀与防护术语

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

October 18, 2019

Implementation date

May 1, 2020

Scope

GB/T 12466-2019 is the English-translated version of 船舶及海洋工程腐蚀与防护术语.

GB/T 12466-2019 is the Chinese national terminology for corrosion and protection in shipbuilding and marine engineering.

It defines the terms of metal corrosion and of the test methods used to study it, the terms of protection and of electrochemical protection, and the terms of coating and plating protection, each with its English equivalent, its definition and a note where the concept needs one.

Entries cover metal corrosion, corrosion system, corrosion protection, corrosion margin and electrochemical corrosion, and the forms corrosion takes in the sea, from marine atmospheric corrosion to splash zone and tidal zone corrosion.

It is written for research, design, production, practice and teaching in this field. It replaces GB/T 12466-1990, was issued on 18 October 2019 and has applied since 1 May 2020.

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Document preview — GB/T 12466-2019

National Standard of the People's Republic of China

ICS: 77.060
Classification: U 04

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

Foreword
1 Scope
2 Corrosion and test methods
3 Protection and electrochemical protection
4 Coatings and other protections
Index

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 12466-1990 "Corrosion and Protection Terms for Ships and Ocean Engineering", compared with GB/T 12466-1990 The technical changes are as follows.

--- Modified 68 terms and definitions such as metal corrosion (see 2.1, 2.3~2.13, 2.27~2.29, 2.34, 2.36~2.43, 2.47~) 2.51, 2.53, 2.54, 3.2~3.7, 3.9~3.12, 3.14, 3.18, 3.19, 3.21~3.25, 3.27~3.30, 3.39~3.42, 4.1, 4.2, 4.4, 4.8, 4.14, 4.15, 4.31, 4.34, 4.35, 4.38, 4.40, 1990 version 2.1~2.10, 2.12, 2.13, 2.15~ 2.23, 2.25~2.32, 3.1, 3.2, 3.4~3.9, 3.11~3.14, 3.16, 3.20~3.26, 3.28~3.31, 3.36, 3.36, 3.38, 3.39, 4.1, 4.2, 4.4, 4.8, 4.19, 4.20, 4.25~4.27, 4.30, 4.32);

--- Added 47 terms and definitions such as corrosion system (see 2.2, 2.15~2.26, 2.30~2.32, 2.35, 2.44~2.46, 2.55~) 2.58, 3.20, 3.31~3.35, 3.43, 4.23~4.29, 4.32, 4.33, 4.41~4.47);

--- Removed two terms and definitions such as current protection and heavy anti-corrosion coating (see 3.37, 4.23 in 1990).

1 Scope

This standard defines the terms of metal corrosion and test methods for ships and marine engineering, electrochemical protection and coating (plating) protection. Its definition.

This standard applies to scientific research, design, production, practice and teaching activities in the field of metal corrosion and protection of ships and marine engineering.

2 Corrosion and test methods

2.1 Metal corrosion

The process by which metal is depleted and destroyed by the surrounding medium.

Note: This effect is usually electrochemical.

2.2 Corrosion system

A system consisting of one or more metals and environmental elements that affect metal corrosion.

2.3 Corrosion protection

Artificially improve the corrosion system to reduce corrosion damage.

2.4 Corrosion margin

When designing a metal component, consider the corresponding length or thickness that is increased by the corrosion loss that may occur during the use period.

2.5 Electrochemical corrosion

Metal materials are corroded by electrochemical reactions caused by the formation of microbatteries in a medium such as humid air or an electrolyte solution.

2.6 Marine corrosion

Corrosion of metallic materials and components in the marine environment.

Note: The marine environment usually refers to the ocean atmosphere, splash zone, tidal zone, full immersion zone, sea mud zone and so on.

2.7 Marine atmospheric corrosion

Corrosion of metallic materials and components in the sea or coastal atmosphere.

2.8 Splash zone corrosion

Corrosion of metal materials and components in the state of ocean spray splashing.

Note: The splash zone refers to the waves that are stirred by wind waves, tides, etc., and the areas where the droplets are scattered.

2.9 Tidal zone corrosion

Corrosion of fixed metal materials and components at sea or shore in the high and low tide levels.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 24 pages — is available in the English PDF.

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