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GB/T 13911-2008 (GBT13911-2008)

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BASIC DATA
Standard ID GB/T 13911-2008 (GB/T13911-2008)
Description (Translated English) Designation for metallic coating and chemical treatment
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard A29
Classification of International Standard 25.220.40
Word Count Estimation 11,157
Date of Issue 2008-07-01
Date of Implementation 2009-02-01
Older Standard (superseded by this standard) GB/T 13911-1992
Quoted Standard GB/T 3138; GB/T 9797; GB/T 9798; GB/T 9799; GB/T 11379; GB/T 12332; GB/T 12599; GB/T 12600; GB/T 13913; GB/T 13346; GB/T 17461; GB/T 17462; ISO 4521; ISO 4523
Drafting Organization Wuhan Institute of Materials Protection
Administrative Organization National Metal and nonmetal coatings Standardization Technical Committee
Regulation (derived from) Announcement of Newly Approved National Standards No. 11 of 2008 (No. 124 overall)
Proposing organization China Machinery Industry Federation
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, China National Standardization Administration Committee
Summary This standard specifies the chemical treatment of metal plating and identification methods. This standard applies to metallic and non-metallic parts on electroplating, electroless plating and chemical processing of identity. Aluminum and aluminum alloy surface chemical treatment methods can be identified with reference to the standard requirements of the common methods of identification.

Standards related to: GB/T 13911-2008

GB/T 13911-2008
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 25.220.40
A 29
Replacing GB/T 13911-1992
Designation for metallic coating and
chemical treatment
ISSUED ON. JULY 01, 2008
IMPLEMENTED ON. FEBRUARY 01, 2009
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the PRC.
Table of contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 5 
4 Designation for metallic coating and chemical treatment ... 5 
5 Examples of designation for typical coatings ... 8 
Foreword
This standard is the revision of GB/T 13911-1992; as compared with GB/T
13911-1992 “Expression methods for metallic coating and chemical treatment”,
the main technical changes of this standard are as follows.
- In accordance with international standards and China's standard practice,
CHANGE the standard name from “Expression methods for metallic
coating and chemical treatment” to “Designation for metallic coating and
chemical treatment”;
- In accordance with the requirements of GB/T 1.1-2000, ADD the foreword;
- MODIFY the scope of application, AND this standard does not apply to the
designation for aluminum and aluminum alloy chemical treatment;
- ADD the reference standard part;
- MODIFY the application example of the original standard; ADOPT the
example description of current standard;
- In accordance with the coating application scope, DELETE the information
of aluminum and aluminum alloy anodizing chemical treatment.
This standard was proposed by the China Machinery Industry Federation.
This standard shall be under the jurisdiction of the National Standardization
Technical Committee for Metallic and Nonmetallic Coatings (SAC/TC 57).
The drafting organization of this standard. Wuhan Institute of Materials
Protection.
The main drafters of this standard. Jia Jianxin, Mao Zuguo, Zhang Dezhong,
He Jie, Deng Rizhi.
This Standard replaces the standard previously issued as follows.
- GB/T 13911-1992.
Designation for metallic coating and
chemical treatment
1 Scope
This standard specifies the designation of metallic coating and chemical
treatment.
This standard applies to the designation for the electroplating, chemical plating,
and chemical treatment for metallic and non-metallic parts.
As for the designation for aluminum and aluminum alloy surface chemical
treatment, it may make reference to the general designation methods as
specified in this standard.
Note. when there is requirements for the metallic coating and chemical
treatment which are not covered in this standard, it is allowed to make
description in relevant technical documents.
2 Normative references
The provisions in following documents become the provisions of this Standard
through reference in this Standard. For the dated references, the subsequent
amendments (excluding corrections) or revisions do not apply to this Standard;
however, parties who reach an agreement based on this Standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB/T 3138 Terminology for metallic coating, chemical treatment and related
process (GB/T 3138-1995, neq ISO 2079.1981)
GB/T 9797 Metallic coatings - Electroplated coatings of nickel plus
chromium and of copper plus nickel plus chromium (GB/T 9797-2005, ISO
1456.2003, IDT)
GB/T 9798 Metallic coatings - Electrodeposited coatings of nickel (GB/T
9798-2005, ISO 1458.2002, IDT)
GB/T 9799 Metallic coatings - Electroplated coatings of zinc on iron or steel
(GB/T 9799-1997, eqv ISO 2081.1986)
GB/T 11379 Metallic coatings - Electroplated coatings of chromium for
engineering purposes (GB/T 11379-2008, ISO 6158.2004, IDT)
GB/T 12332 Metallic coatings - Electroplated coatings of nickel for
engineering purposes (GB/T 12332-2008, ISO 4526.2004, IDT)
GB/T 12599 Metallic coatings - Electroplated coatings of tin - Specification
and test methods (GB/T 12599-2002, ISO 2093.1986, MOD)
GB/T 12600 Metallic coatings - Electroplated coatings of nickel plus
chromium on plastics materials (GB/T 12600-2005, ISO 4525.2003, IDT)
GB/T 13913 Metallic coatings - Autocatalytic (Electroless)
nickel-phosphorus alloy coatings - Specification and test methods (GB/T
13913-2008, ISO 4527.2003, IDT)
GB/T 13346 Metallic coatings - Electroplated coatings of cadmium on iron
and steel (GB/T 13346-1992, idt ISO2082.1986)
GB/T 17461 Metallic coatings - Electroplated coatings of tin-lead alloys
(GB/T 17461-1998, eqv ISO 7587.1986)
GB/T 17462 Metallic coatings - Electroplated coatings of tin-nickel alloys
(GB/T 17462-1998, eqv ISO 2179.1986)
ISO 4521 Metallic and other inorganic coatings - Electrodeposited silver and
silver alloy coatings for engineering purposes
ISO 4523 Metallic coatings - Electrodeposited gold and gold alloy coatings
for engineering purposes
3 Terms and definitions
The terms and definitions established in GB/T 3138 apply to this standard.
4 Designation for metallic coating and chemical
treatment
4.1 The designation for metallic coating and chemical treatment is generally
composed of four parts.
Part 1 includes the coating method, which is an essential element to constitute
the designation;
f) When it requires bottom coating, it shall indicate the bottom coating
materials and minimum thickness (unit in μm); when there is requirement
for bottom coating characteristics, it shall, in accordance with the typical
designation (SEE Chapter 5), indicate the bottom coating characteristic
symbol; if there is no characteristic requirement, it means that the coating
has no special requirement, AND it is allowed to omit the bottom coating
characteristic symbol. As for the coating for alloy materials, if necessary,
it shall also indicate the composition and content of alloy materials. If it
does not require bottom coating, it is not required for indication;
g) When it requires mid coating, it shall indicate the mid coating materials
and minimum thickness (unit in μm); when there is requirement for mid
coating characteristics, it shall, in accordance with the typical designation
(SEE Chapter 5), indicate the mid coating characteristic symbol; if there
is no characteristic requirement, it means that the coating has no special
requirement, AND it is allowed to omit the mid coating characteristic
symbol. As for the coating for alloy materials, if necessary, it shall also
indicate the composition and content of alloy materials. If it does not
require mid coating, it is not required for indication;
h) It shall indicate the designation for surface coating materials and
minimum thickness. When there is requirement for surface coating
characteristics, it shall, in accordance with the typical designation (SEE
Chapter 5), indicate the surface coating characteristic symbol. As for the
coating for alloy materials, if necessary, it shall also indicate the
composition and content of alloy materials. If there is no characteristic
requirement, it means that the coating has no special requirement, AND it
is allowed to omit the surface coating characteristic symbol;
i) Post-treatment of coatings refers to chemical treatment, electrochemical
treatment and heat treatment; as for the designation methods, SEE the
provisions on typical designations (SEE Chapter 5).
j) When necessary, it shall indicate the designation for the alloy coating
materials. As for the binary alloy coating, it shall, after the main element,
add a bracket AND indicate the main element content, AND use a dash to
connect the secondary element; for example, Sn (60)-Pb means tin-lead
alloy coating, in which the tin content is 60%; when the alloy composition
content does not need to be indicated or is inconvenient to be indicated, it
is allowed to not indicate it. As for the ternary alloy, it shall indicate the
contents of the two elements, and so on;
4.2 Commonly used symbols for metallic coating methods and chemical
treatment
As for the designations of nickel and copper + nickel coating layer on metallic
base, SEE the provisions on designation in GB/T 9798; as for the coating
characteristic designation, SEE Table 3. The example and description of
designation are as follows.
Example 1. Electroplated layer GB/T 9798-Fe/Cu20a Ni25s
It refers to the electroplated layer designation that on the iron & steel base is
coated with 20 μm extended and flattened copper + 25 μm satin nickel.
Example 2. Electroplated layer GB/T 9798-Fe/Ni30p
It refers to the electroplated layer designation that on the iron & steel base is
coated with 30 μm semi-bright nickel.
Example 3. Electroplated layer GB/T 9798-Zn/Cu10a Ni15b
It refers to the electroplated layer designation that on the zinc alloy base is
coated with 10 μm extended and flattened copper + 15 μm all bright nickel.
Example 4. Electroplated layer GB/T 9798-Cu/Ni10b
It refers to the electroplated layer designation that on the copper alloy base is
coated with 10 μm all bright nickel.
Example 5. Electroplated layer GB/T 9798-Al/Ni25b
It refers to the electroplated layer designation that on the aluminum alloy base
is coated with 25 μm all bright nickel.
5.4 Designation of zinc coating layer and cadmi...
...