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GB/T 30789.5-2015 PDF English

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GB/T 30789.5-2015: Paints and varnishes -- Evaluation of degradation of coatings -- Designation of quantity and size of defects, and of intensity of uniform changes in appearance -- Part 5: Assessment of degree of flaking
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GB/T 30789.5-2015English134 Add to Cart 3 days [Need to translate] Paints and varnishes -- Evaluation of degradation of coatings -- Designation of quantity and size of defects, and of intensity of uniform changes in appearance -- Part 5: Assessment of degree of flaking

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Basic data

Standard ID GB/T 30789.5-2015 (GB/T30789.5-2015)
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 5: Assessment of degree of flaking
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G50
Classification of International Standard 87.040
Word Count Estimation 7,717
Date of Issue 2015-07-03
Date of Implementation 2016-02-01
Quoted Standard ISO 4628-1
Adopted Standard ISO 4628-5-2003, IDT
Regulation (derived from) National Standard Announcement 2015 No.22
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 illustrated by comparison with the standard, and use the definitions specified in ISO 4628-1, to assess the level of exfoliation method. ISO 4628-1 defines the coating defects caused by aging on the number and size of the uniformity of appearance change assessment system, assessment and overview of the General System. The evaluation system is suitable for aging and weathering caused by the defect, as well as a change in color (for example: yellowing) of uniform changes.

GB/T 30789.5-2015: Paints and varnishes -- Evaluation of degradation of coatings -- Designation of quantity and size of defects, and of intensity of uniform changes in appearance -- Part 5: Assessment of degree of flaking







---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 5. Assessment of degree of flaking ICS 87.040 G50 National Standards of People's Republic of China Paints and varnishes - Evaluation of degradation of coatings defects The number and size, and degree of uniform changes in appearance Identification - Part 5. Evaluation of flaking rating Designationofquantityandsizeofdefects, andofintensityofuniform changesinappearance-Part 5. Assessmentofdegreeofflaking (ISO 4628-5.2003, IDT) Issued on. 2015-07-03 2016-02-01 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 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 530,789. This section drafted in accordance with GB/T 1.1-2009 given rules. This section uses the translation method identical with ISO 4628-5.2003 "number and size of paints and varnishes Evaluation of degradation of coatings defects As well as the appearance of a uniform degree of change identified Part 5. flaking rating 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 Paint Chemical Research Institute Co., Ltd., China Paint (Shenzhen) Co., Ltd., Guangzhou Composites Research Institute Co., Ltd., China Aviation Bermuda New Materials Engineering Co., Ltd., Dongguan Science and Technology Co., Ltd. Magnesium Magnesium Security. The main drafters of this section. Cao Xiaodong Cheng red, Wen Jing, Shi Hua, Li Weirong. Paints and varnishes - Evaluation of degradation of coatings defects The number and size, and degree of uniform changes in appearance Identification - Part 5. Evaluation of flaking rating

1 Scope

This section GB/T 30789 gives illustrated by comparison with the standard, and use the definitions specified in ISO 4628-1, to evaluate peel Off grade approach. 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 evaluation system is suitable for aging and weathering caused by the defect, as well as a change in color (for example. yellowing) of uniform changes.

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 Flaking rating degreeofflaking Coating peeling off the number, size and depth of the assessment.

4 rating

According peeling types, see Table 1 and Figures 1 and 2 to assess the number of peeling. Note. Figure 1 shows a non-directional peeling flaking, peeling is shown in Figure 2 along a direction of peeling, which is due to the anisotropy of the substrate. Table 1 rating ablation amount grade Peeling area 00 1 0.1 2 0.3 ...

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