GB/T 30789.8-2015 English PDF

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GB/T 30789.8-2015: Paints and varnishes -- Evaluation of degradation of coatings -- Designation of quantity and size of defects, and of intensity of uniform changes in appearance -- Part 8: Assessment of degree of delamination and corrosion around a scribe or other artifici
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 30789.8-2015	214	Add to Cart	3 days	Paints and varnishes -- Evaluation of degradation of coatings -- Designation of quantity and size of defects, and of intensity of uniform changes in appearance -- Part 8: Assessment of degree of delamination and corrosion around a scribe or other artifici	Valid

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Basic data

Standard ID: GB/T 30789.8-2015 (GB/T30789.8-2015)
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 8: Assessment of degree of delamination and corrosion around a scribe or other artifici
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G50
Classification of International Standard: 87.040
Word Count Estimation: 11,136
Date of Issue: 2015-05-15
Date of Implementation: 2015-10-01
Quoted Standard: ISO 3270
Adopted Standard: ISO 4628-8-2012, 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 the method for the assessment scribe or other artificial defect peel and degree of corrosion on the periphery of painted test panels or other painted artifacts caused by the corrosive environment of the method. Not part of the assessment does not include points or pitting corrosion depth.

GB/T 30789.8-2015: Paints and varnishes -- Evaluation of degradation of coatings -- Designation of quantity and size of defects, and of intensity of uniform changes in appearance -- Part 8: Assessment of degree of delamination and corrosion around a scribe or other artifici

---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.
(Evaluation scribe or other artificial defect surrounding the release and corrosion levels. identity Part 8 as well as the number and size of uniform changes in appearance degree of degradation of coatings paints and varnishes evaluate defects) 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 appearance The degree of change identified Part 8. scribe or other artificial defect Evaluation surrounding peeling and corrosion levels Designationofquantityandsizeofdefects, andofintensityofuniform changesinappearance-Part 8. Assessmentofdegreeofdelaminationand (ISO 4628-8.2012, 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 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 830,789. This section drafted in accordance with GB/T 1.1-2009 given rules. This section uses the translation method identical with ISO 4628-8.2012 "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 8. scribe or other artificial defect assessment and corrosion levels surrounding the release "formulation. Correspondence between the consistency of the standards of international documents and normative references of the following documents. GB/T 9278-2008 paint sample conditioning and testing temperature and humidity (ISO 3270. 1984, 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., Shenzhen Hirota Decoration Group Co., Ltd., a Guangzhou Into the Materials Research Institute Co., Ltd., Guangzhou standard laboratory equipment Geda Products Co., Ltd., Zhejiang Tong fish New Material Co., China Ship Institute of Maritime Corporation eleventh. The main drafters of this section. Cao Xiaodong, Li Shaojiang, Wen Jing, Wang Chongwu, Yangya Liang, Fu Jianhua. Paints and varnishes - Evaluation of degradation of coatings The number and size of defects and uniform appearance The degree of change identified Part 8. scribe or other artificial defect Evaluation surrounding peeling and corrosion levels

1 Scope

This section GB/T 30789 gives an assessment on the painted test panels painted or other artifacts caused by the corrosive environment scribing or other Surrounding stripping and artificial methods of corrosion defects. This section does not include the evaluation of pitting or pitting depth. ISO 15711 test methods are detailed in seawater immersion; corrosive environments such as salt spray artificial atmosphere, the ISO 9227 test methods are detailed;. 1 Note Of course, it includes the natural environment. Note 2. Evaluation of delamination and corrosion, while other defects should also be assessed. Evaluation methods are as follows. --- According to ISO 4628-2 assessment gassing; --- According to ISO 4628-3 assessed rust grade; --- According to ISO 4628-4 assessment cracking grade; --- According to ISO 4628-5 assessment flaking grade; --- According to ISO 4628-10 Evaluation of filiform corrosion levels.

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. ISO 3270 Paints, varnishes and their raw state of the sample conditioning and testing temperature and humidity (Paintsandvarnishesand theirrawmaterials-Temperaturesandhumiditiesforconditioningandtesting)

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Holidays holiday Painted on a specific area substrates without coating. 3.2 Artificial defects artificialdefect Before the corrosion test, by man-made holidays to expose the underlying metal coating substrates. 3.3 Circular defect circulardefect Before the corrosion test, artificially created by the circular drain coating, the coating to expose the underlying metal substrate. ......

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