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GB/T 7790-2008 English PDF

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GB/T 7790-2008: Paints and varnishes -- Determination of resistance to cathodic disbonding of coatings exposed to sea water
Status: Valid

GB/T 7790: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 7790-2008English259 Add to Cart 3 days [Need to translate] Paints and varnishes -- Determination of resistance to cathodic disbonding of coatings exposed to sea water Valid GB/T 7790-2008
GB/T 7790-1996English239 Add to Cart 2 days [Need to translate] Test method for the resistance of cathodic disbondment of anticorrosive paint Obsolete GB/T 7790-1996
GB/T 7790-1987EnglishRFQ ASK 3 days [Need to translate] Test method for durability of anticorrosive paint under cathodic protection condition Obsolete GB/T 7790-1987

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Basic data

Standard ID GB/T 7790-2008 (GB/T7790-2008)
Description (Translated English) Paints and varnishes -- Determination of resistance to cathodic disbonding of coatings exposed to sea water
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard U05
Classification of International Standard 47.020.05
Word Count Estimation 11,158
Date of Issue 2008-07-30
Date of Implementation 2009-02-01
Older Standard (superseded by this standard) GB/T 7790-1996
Quoted Standard GB 712; GB/T 1765; GB/T 1766; GB/T 3097; GB/T 3186; GB/T 6682; GB/T 8923-1988; GB/T 9278; GB/T 13288; GB/T 13452.2
Adopted Standard ISO 15711-2003, MOD
Regulation (derived from) National Standard Approval Announcement 2008 No.12 (Total No.125)
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 test methods for coating exposed to seawater cathodic disbondment determination, including: principle of the method, test solution, experimental device, sample and its preparation, examination and evaluation of test results coatings, , experimental step test reports. This standard applies to ships and marine engineering structures on a metal substrate, such as exposure to seawater coating. This standard does not apply to assess the coating structure on the land. This standard specifies test methods include the following two: a) Method A

GB/T 7790-2008: Paints and varnishes -- Determination of resistance to cathodic disbonding of coatings exposed to sea water


---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. Determination of resistance to cathodic disbonding of coatings exposed to sea water ICS 47.020.05 U05 National Standards of People's Republic of China Replacing GB/T 7790-1996 Paints and varnishes coating is exposed to seawater Determination of resistance to cathodic disbanding performance (ISO 15711.2003, MOD) Posted 2008-07-30 2009-02-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This revised standard adopts ISO 15711. "Paints and varnish coating is exposed to seawater cathodic disbondment performance of" 2003 (English Chinese Version). This standard is based on ISO 15711.2003 redrafted. Taking into account the situation of our country, the present standard and ISO 15711.2003 compared with the following major differences. --- The ISO 15711.2003 is referenced in ISO standards, to the corresponding national standards; --- The standard Chapter, article number and its contents with the ISO 15711.2003 there is a change on the order; --- The standard ISO 15711.2003 "on a typical circuit diagram of cathodic protection 1 and 2" was modified; --- This standard ISO 15711.2003 Appendix B "sacrificial anode --- zinc alloy composition" Move text form in Table 3 Formula listed and one of the "calcium" amended to read "Chrome"; --- This standard does not adopt ISO 15711.2003 in the "precision" "supplementary information required" section and Appendix A. This standard replaces GB/T 7790-1996 "Test Method for cathodic stripping rust-resistant." This standard compared with GB/T 7790-1996, mainly for the following changes. --- Change the standard name; --- Revised cathodic disbondment test method using the original standard test method only provides a magnesium alloy anode, impressed current revised Sacrificial anode and two test methods. The standard proposed by China Shipbuilding Industry Corporation. This standard by the National Standardization Technical Committee Marine boat marine materials application technology at the Technical Committee. This standard was drafted. China Shipbuilding Industry Corporation seventh twenty-five Institute. The main drafters of this standard. Huang Shuzhen, Taonai Wang. This standard replaces the standards previously issued as follows. --- GB 7790-1987, GB/T 7790-1996. Paints and varnishes coating is exposed to seawater Determination of resistance to cathodic disbanding performance

1 Scope

This standard specifies the test methods for coating exposed to seawater cathodic disbondment performance measurement, including. principle of the method, the test solution, the test Test apparatus, and the sample preparation, test procedure, coating inspection and test results evaluation, test reports. This standard applies to ships and marine engineering and other exposed structures on a metal substrate seawater coating. This standard does not apply to assess the coating structure on the land. Test methods specified in this standard includes the following two. a) Method A. Impressed current law; b) Method B. sacrificial anode.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB 712 hull structural steel GB/T 1765 Determination of resistance to humidity, salt spray, weather resistance (artificial acceleration) Preparation of the film GB/T 1766 Paints and rating methods (GB/T 1766-1995, neq ISO 4628-1. 1980) clearcoat aging GB/T 3097 water quality standards GB/T 3186 Paints, varnishes and raw materials for paints and varnishes - Sampling (GB/T 3186-2006, ISO 15528.2000, IDT) GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD) GB/T 8923-1988 before painting steel surface rust grades and preparation grades (ISO 8501-1. 1988, EQV) GB/T 9278 paint sample conditioning and testing temperature and humidity (GB/T 9278-2008, ISO 3270. 1984, IDT) Evaluation of GB/T 13288 steel surface before coating roughness level (comparison specimens Act) (GB/T 13288-1991, neq ISO 8503- 2. 1988) GB/T 13452.2 Paints and varnishes - Determination of film thickness (GB/T 13452.2-2008, ISO 2808.2007, IDT)

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 Caused by the adhesion of coating and cathodic protection of metal surfaces between failure. Often starting in the coating system of a defect, such as coating Accidental injury, construction defect or coating permeability as excessive.

4 principle of the method

4.1 Method A Cathodic protection circuit control test potential.

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