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GB/T 30789.2-2014: Paints and varnishes -- Evaluation of degradation of coatings -- Designation of quantity and size of defects, and of intensity of uniform changes in appearance -- Part 2: Assessment of degree of blistering
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Paints and varnishes -- Evaluation of degradation of coatings -- Designation of quantity and size of defects, and of intensity of uniform changes in appearance -- Part 2: Assessment of degree of blistering
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GB/T 30789.2-2014
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PDF similar to GB/T 30789.2-2014
Basic data | Standard ID | GB/T 30789.2-2014 (GB/T30789.2-2014) | | Description (Translated English) | Paints and varnishes -- Evaluation of degradation of coatings -- Designation of quantity and size of defects, and of intensity of uniform changes in appearance -- Part 2: Assessment of degree of blistering | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G50 | | Classification of International Standard | 87.040 | | Word Count Estimation | 15,192 | | Date of Issue | 7/8/2014 | | Date of Implementation | 12/1/2014 | | Quoted Standard | ISO 4628-1 | | Adopted Standard | ISO 4628-2-2003, IDT | | Regulation (derived from) | 2014 National Standards Bulletin No. 18 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies a standard image with the comparative assessment of gassing method. Standard image of the standard instructions given under each bubble size and bubble size 2, 3, 4, 5 blistering case number (density) 2, 3, 4, 5. ISO 4628-1 defines | GB/T 30789.2-2014: Paints and varnishes -- Evaluation of degradation of coatings -- Designation of quantity and size of defects, and of intensity of uniform changes in appearance -- Part 2: Assessment of degree of blistering
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
.. Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 2.. Assessment of degree of blistering
ICS 87.040
G50
National Standards of People's Republic of China
Paints and varnishes - Evaluation of degradation of coatings
The number and size of defects and uniform changes in appearance
Degree of identification - Part 2. Evaluation of gassing
quantityandsizeofdefects, andofintensityofuniformchangesin
appearance-Part 2. Assessmentofdegreeofblistering
(ISO 4628-2.2003, IDT)
Issued on. 2014-07-08
2014-12-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 30789 "Paints and varnish coating aging rating number and size of the defect and the identity of the extent of uniform changes in appearance."
Divided into the following nine sections.
--- Part 1. General and identification systems;
--- Part 2. Evaluation of blistering levels;
--- Part 3. Evaluation of rust grade;
--- Part 4. Evaluation cracking grade;
--- Part 5. Evaluation of flaking grade;
--- Part 6. Assessment of degree of chalking tape method;
--- Part 7. Method for Evaluation of velvet cloth chalking rating;
--- Part 8. scribe or other artificial defect assessment and corrosion peeling peripheral level;
--- Part 9. Evaluation of filiform corrosion level.
This section GB/T Part of 230,789.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This section uses the translation method identical with ISO 4628-2.2003 "number and size of paints and varnishes Evaluation of degradation of coatings defects
And the second part identifies the degree of change of uniform appearance. gassing assessment. "
This part is proposed by the China Petroleum and Chemical Industry Association.
This part of the National Standardization Technical Committee and the pigment coating (SAC/TC5) centralized.
This section drafted by. CNOOC Changzhou coating Chemical Research Institute, Heilongjiang Provincial Quality Supervision and Testing Institute, Shaanxi paint Pagoda Hill shares
Parts Limited, Beijing Air Materiel Biam new materials technology Engineering Co., Ltd., Shenzhen Hirota Decoration Group Co., Ltd., COSCO Kansai
Paint Chemical Co., Ltd., Shandong Pentium Paint Co., Ltd..
The main drafters of this section. Zhang Ping, Sun Lide, Liu Xiaoqing, Yang Zhenbo, Lishao Jiang, Liu Huicheng, Wang Hui.
Paints and varnishes - Evaluation of degradation of coatings
The number and size of defects and uniform changes in appearance
Degree of identification - Part 2. Evaluation of gassing
1 Scope
GB/T 30789 in this section is given by comparison with a standard image evaluation gassing method.
Standard image This section gives a description of each of bubble size and bubble size 2,3,4,5 blistering case number (density) 2,3,4,5.
ISO 4628-1 defines the number and size of defects on the coating due to aging and the changes in the appearance of uniformity assessment systems, and almost
General said the assessment system. The assessment system is suitable for natural and artificial accelerated aging caused by exposure defects and uniform changes such as color change
Of, for example. yellowing.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
The number and size of the ISO 4628-1 Paints and varnishes - Evaluation of degradation of coatings defects and uniformity of appearance change logo
Part 1. General and identification system (Paintsandvarnishes-Evaluationofdegradationofcoatings-Designation
ofquantityandsizeofdefects, andofintensityofuniformchangesinappearance-Part 1. Generalin-
troductionanddesignationsystem)
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Gassing degreeofblistering
Blistering of the coating by the number (density) and the size of the assessment.
4 Evaluation
According to FIGS. 1 to 4 to assess the number and size of the coating blisters.
When the bubble size is inconsistent inspection area to check the area representative to represent the size of the bubble.
Be assessed in the light of adequate conditions.
If you are using an optical imaging system assessment, required in Appendix A picture calibration.
5 represents the result
According to FIGS. 1 to 4 was evaluated by the number of foaming (density) and size hierarchy. The results have shown that the area about the size of the bubble,
Check or percentage of total area accounted for.
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