QB/T 3832-1999Evaluation of the corrosion test results of the metal deposits for the light industrial products (English PDF)
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Issued by
State Bureau of Light Industry
Level / Type
National · Recommended
Issue date
April 21, 1999
Implementation date
April 21, 1999
Scope
QB/T 3832-1999 (Evaluation of the corrosion test results of the metal deposits for the light industrial products) is available as an English-translated PDF.
QB/T 3832-1999 — This method is applicable to rating of test specimen after neutral salt spray test, acetic acid salt spray test, copper salt filling acetic acid salt spray test, corrosion paste test and sulfur dioxide gas corrosion test.
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Document preview — QB/T 3832-1999
National Standard of the People's Republic of China
- Classification
- Y 73
Issued by: State Bureau of Light Industry
Contents
- Foreword...3
- 1 Scope...4
- 2 Rating content...4
- 3 Assessment area...4
- 4 Rating method...5
- 5 Rating instructions...6
Foreword
The previous version of this Standard is GB 5944-1986 Evaluation of the
corrosion test results of the metal deposits for the light industrial products, which
has been transferred to QB/T 3832-1999 via the publication of State Bureau of
Light Industry [1999] No. 12 Document. The content shall remain unchanged.
This Standard was proposed by State Administration of Light Industry Bureau
of Industry Management.
This Standard shall be under the jurisdiction of National Technical Committee
on Daily Hardware of Standardization Administration of China.
The drafting organizations of this Standard. Shanghai Institute of Light Industry,
Shanghai Daily Hardware Industry Research Institute.
Main drafters of this Standard. Zhang Fulin, He Changlin, Dong Zicheng.
Evaluation of the corrosion test results of the metal
deposits for the light industrial products
This Standard specifies the evaluation method for corrosion test results of
plating layer specimen after corrosion test.
This Standard adopts International Standard ISO 1462-1973 Metallic coatings
-- Coatings other than those anodic to the basis metal -- Accelerated corrosion
tests -- Method for the evaluation of the results.
1 Scope
This method is applicable to rating of test specimen after neutral salt spray test,
acetic acid salt spray test, copper salt filling acetic acid salt spray test, corrosion
paste test and sulfur dioxide gas corrosion test.
2 Rating content
This rating method is mainly for the inspection and evaluation in two aspects of
specimen after corrosion test.
2.1 Basic corrosion point refers to the base metal corrosion point penetrating
plating layer of which its size does not include the accompanying rust. Usually,
it is difficult to remove the corrosion point while it is easy to remove rust.
3 Assessment area
Assessment area refers to the main surface of the corrosion test and the
surface of the rating, which should be specified in the product standard.
4 Rating method
4.1 Calculation of corrosion rate
4.2 Corrosion resistance level
The corresponding corrosion level shall be determined in accordance with
corrosion rate, as shown in Table 1.
5 Rating instructions
5.1 If there are 10 or more corrosion points on the specimen surface, when
they appear in any two adjacent assessment squares, this specimen shall be
seriously locally corrosive and cannot be rated.
5.4 For small parts with complex shapes, if it is difficult to carry out corrosion
rating, it shall be allowed to rate in "piece". The specific method shall be
specified in the product standard.
5.5 As light industry products are in various types and complex shapes, taking
into account the rating and time-consuming of square-drawing method, the
following equivalent simply 10-grade method can be used during the
development of specific standard.
5.6 The specific provisions on simple 10-grade method are shown in Table 2.
The relationship BETWEEN the number of rust point on 1 decimeter square
meters of assessment area AND corrosion resistance level is shown in Table 2.
5.6.2 When calculating assessment area, the rust points separated by 5 mm
or less shall not be recounted.
5.6.3 Within the assessment area, if there is corrosion point greater than 2.5
mm square in any area or more than 10 corrosion points in 5 mm square area,
the specimen shall not be rated.
QB/T 3832-1999
QB
LIGHT INDUSTRY STANDARD OF
THE PEOPLE'S REPUBLIC OF CHINA
Y 73
Replacing GB/T 5944-1986
Evaluation of the corrosion test results of the metal
deposits for the light industrial products
Issued on. APRIL 21, 1999
Implemented on. APRIL 21, 1999
Issued by. State Bureau of Light Industry
Table of Contents
Foreword... 3
1 Scope... 4
2 Rating content... 4
3 Assessment area... 4
4 Rating method... 5
5 Rating instructions... 6
Foreword
The previous version of this Standard is GB 5944-1986 Evaluation of the
corrosion test results of the metal deposits for the light industrial products, which
has been transferred to QB/T 3832-1999 via the publication of State Bureau of
Light Industry [1999] No. 12 Document. The content shall remain unchanged.
This Standard was proposed by State Administration of Light Industry Bureau
of Industry Management.
This Standard shall be under the jurisdiction of National Technical Committee
on Daily Hardware of Standardization Administration of China.
The drafting organizations of this Standard. Shanghai Institute of Light Industry,
Shanghai Daily Hardware Industry Research Institute.
Main drafters of this Standard. Zhang Fulin, He Changlin, Dong Zicheng.
Evaluation of the corrosion test results of the metal
deposits for the light industrial products
This Standard specifies the evaluation method for corrosion test results of
plating layer specimen after corrosion test.
This Standard adopts International Standard ISO 1462-1973 Metallic coatings
-- Coatings other than those anodic to the basis metal -- Accelerated corrosion
tests -- Method for the evaluation of the results.
1 Scope
This method is applicable to rating of test specimen after neutral salt spray test,
acetic acid salt spray test, copper salt filling acetic acid salt spray test, corrosion
paste test and sulfur dioxide gas corrosion test.
2 Rating content
This rating method is mainly for the inspection and evaluation in two aspects of
specimen after corrosion test.
2.1 Basic corrosion point refers to the base metal corrosion point penetrating
plating layer of which its size does not include the accompanying rust. Usually,
it is difficult to remove the corrosion point while it is easy to remove rust.
3 Assessment area
Assessment area refers to the main surface of the corrosion test and the
surface of the rating, which should be specified in the product standard.
4 Rating method
4.1 Calculation of corrosion rate
4.2 Corrosion resistance level
The corresponding corrosion level shall be determined in accordance with
corrosion rate, as shown in Table 1.
5 Rating instructions
5.1 If there are 10 or more corrosion points on the specimen surface, when
they appear in any two adjacent assessment squares, this specimen shall be
seriously locally corrosive and cannot be rated.
5.4 For small parts with complex shapes, if it is difficult to carry out corrosion
rating, it shall be allowed to rate in "piece". The specific method shall be
specified in the product standard.
5.5 As light industry products are in various types and complex shapes, taking
into account the rating and time-consuming of square-drawing method, the
following equivalent simply 10-grade method can be used during the
development of specific standard.
5.6 The specific provisions on simple 10-grade method are shown in Table 2.
The relationship BETWEEN the number of rust point on 1 decimeter square
meters of assessment area AND corrosion resistance level is shown in Table 2.
5.6.2 When calculating assessment area, the rust points separated by 5 mm
or less shall not be recounted.
5.6.3 Within the assessment area, if there is corrosion point greater than 2.5
mm square in any area or more than 10 corrosion points in 5 mm square area,
the specimen shall not be rated.
......
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 6 pages — is available in the English PDF.
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