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GB/T 30789.7-2015: Paints and varnishes -- Evaluation of degradation of coatings -- Designation of quantity and size of defects, and of intensity of uniform changes in appearance -- Part 7: Assessment of degree of chalking by velvet method
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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 7: Assessment of degree of chalking by velvet method
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GB/T 30789.7-2015
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Basic data | Standard ID | GB/T 30789.7-2015 (GB/T30789.7-2015) | | 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 7: Assessment of degree of chalking by velvet method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G50 | | Classification of International Standard | 87.040 | | Word Count Estimation | 6,652 | | Date of Issue | 2015-05-15 | | Date of Implementation | 2015-10-01 | | Quoted Standard | ISO 4628-1; ISO 4628-6-1990; ISO 8503-1 | | Adopted Standard | ISO 4628-7-2003, IDT | | Regulation (derived from) | National Standard Announcement 2015 No. 15 | | 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 degree of chalking assessment methods, especially for white or other paint coatings and multi-coating system on a rough surface (such as ISO 8503-1 roughness greater than a predetermined roughness comparison specimens G in paragraph 4) chalking rating. The method specified in this coating can also be used to assess and multi-grade powder coating system on a smooth surface, but the method specified in ISO 4628-6 is more suitable. This test method is applicable to mineral coating on the substrate and a multi-coat system. | GB/T 30789.7-2015: Paints and varnishes -- Evaluation of degradation of coatings -- Designation of quantity and size of defects, and of intensity of uniform changes in appearance -- Part 7: Assessment of degree of chalking by velvet method
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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 7. Assessment of degree of chalking by velvet method
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 appearance
Even the degree of change logo
Part 7. Method for Evaluation of velvet cloth degree of chalking
quantityandsizeofdefects, andofintensityofuniformchangesin
appearance-Part 7. Assessmentofdegreeofchalkingbyvelvetmethod
(ISO 4628-7.2003, IDT)
Issued on. 2015-10-01 2015-05-15 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 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 730,789.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This section uses the translation method identical with ISO 4628-7.2003 "number and size of paints and varnishes Evaluation of degradation of coatings defects
As well as the appearance of a uniform degree of change identification - Part 7. Method for Evaluation of velvet cloth chalking grade. "
Consistency correspondence between this part of international documents and normative references of our files are as follows.
GB/T 13288.1 steel surface roughness characteristics - Part 1 before application of paints and spray steel surface treatment after cleaning. for
Evaluation of technical requirements and definitions after blast - cleaned steel surface roughness of the surface roughness comparison specimens ISO 's (ISO 8503-1. 1988,
IDT).
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 Paint Chemical Research Institute Co., Ltd., Guangzhou Institute of Materials Co., Ltd., Nanjing production
Product Quality Supervision and Inspection Institute, Shenzhen Hirota Decoration Group Co., Ltd., Guangzhou standard Geda laboratory equipment supplies Limited.
The main drafters of this section. Zhang Ping, Wen Jing, Fu Rong Jin, Li Shaojiang, Wang Chongwu.
Paints and varnishes - Evaluation of degradation of coatings
The number and size of defects and appearance
Even the degree of change logo
Part 7. Method for Evaluation of velvet cloth degree of chalking
1 Scope
This section GB/T 30789 requirements, a chalking grade evaluation method, especially for white on a rough surface or other color
Lacquer coating and multi-coating system (for example, paragraph 4 of roughness greater than the roughness comparison specimens G ISO 8503-1 defined in) degree of chalking
assessment.
The method specified in this standard can also be used to assess coating and multi-coating system of degree of chalking on the smooth surface, but the provisions of ISO 4628-6
The method is more suitable.
This test method is applicable to the mineral substrate coating and multi-coating system, such as. fiber cement boards, bricks, concrete and mortar bottom, measuring
Test is not affected by the surface structure. Experienced operators using this method is very effective and can be used for laboratory and field evaluation.
Note 1. When the technical specifications stated with reference to this section, the test conditions (including aging method and substrate) agreed by all relevant parties.
Note 2. This section provides a relative level evaluation method, therefore, does not apply to the agreement. Table 1 Note.
ISO 4628-1 defines coatings for aging defect number and size of uniform changes in appearance as well as the degree of identification, assessment and overview of the
General System. The assessment system is particularly suitable for general types of defects and damage caused by aging, such as color changes, such as 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)
ISO 4628-6. the number and size of uniform changes in appearance as well as the extent of 1990 Paints and varnishes - Evaluation of degradation of coatings defects
Logo Part 6. Assessment of degree of chalking tape method (Paintsandvarnishes-Evaluationofdegradationofpaintcoat-
ings-Designationofintensity, quantityandsizeofcommontypesofdefect-Part 6. Ratingofdegree
ofchalkingbytapemethod)
Steel surface roughness characteristics ISO 8503-1 application of paints and related products - steel surfaces clean up after the blast
Part 1. Technical requirements for the assessment after abrasive blast cleaned steel surface roughness of ISO surface profile comparators and definitions
(Preparationofsteelsubstratesbeforeapplicationofpaintsandrelatedproducts-Surfaceroughness
characteristicsofblast-cleanedsteelsubstrates-Part 1. SpecificationsanddefinitionsforISO surface
profilecomparatorsfortheassessmentofabrasiveblast-cleanedsurfaces)
3 Terms and Definitions
The following terms and definitions apply to this document.
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