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GB/T 9789-2008 English PDF

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GB/T 9789-2008: Metallic and other non-organic coatings -- Sulfur dioxide test with general condensation of moisture
Status: Valid

GB/T 9789: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 9789-2008English154 Add to Cart 3 days [Need to translate] Metallic and other non-organic coatings -- Sulfur dioxide test with general condensation of moisture Valid GB/T 9789-2008
GB/T 9789-1988English279 Add to Cart 3 days [Need to translate] Metallic and other non-organic coatings--Sulfur dioxide test with general condensation of moisture Obsolete GB/T 9789-1988

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Basic data

Standard ID GB/T 9789-2008 (GB/T9789-2008)
Description (Translated English) Metallic and other non-organic coatings -- Sulfur dioxide test with general condensation of moisture
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard A29
Classification of International Standard 25.220.40
Word Count Estimation 8,895
Date of Issue 2008-06-19
Date of Implementation 2009-01-01
Older Standard (superseded by this standard) GB/T 9789-1988
Adopted Standard ISO 6988-1985, IDT
Regulation (derived from) Announcement of Newly Approved National Standards No. 10 of 2008 (total 123)
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 sulfur dioxide in the atmosphere and the condensation conditions, materials or products Test methods for corrosion resistance. This standard applies to metallic coatings and inorganic coatings for corrosion testing. This standard does not apply to paints and varnishes cladding corrosion test. The test results can not be directly used as the test material was encountered in the use of various types of environment corrosion resistance guide, also in the use of different materials can not be used as the relative corrosion resistance of the direct guidance.

GB/T 9789-2008: Metallic and other non-organic coatings -- Sulfur dioxide test with general condensation of moisture


---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.
Metallic and other non-organic coatings. Sulfur dioxide test with general condensation of moisture ICS 25.220.40 A29 National Standards of People's Republic of China GB/T 9789-2008/ISO 6988. 1985 Replacing GB/T 9789-1988 Metallic and other inorganic coatings generally Gel Sulfur dioxide test conditions (ISO 6988. 1985, IDT) Posted 2008-06-19 2009-01-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard is equivalent to international standards ISO 6988. 1985 sulfur dioxide under "metals and other inorganic coatings general condensation Corrosion Test "(in English). This standard is based on ISO 6988. 1985 Translation drafted. For ease of use, the editorial changes made the following standard. --- Delete international standards foreword, preface increased our standards; --- "This International Standard" be replaced by "of this standard." This standard replaces GB/T 9789-1988 "sulfur dioxide corrosion test under metal and other non - organic coatings general condensation Experience. " Compared with GB/T 9789-1988 The main changes are as follows. --- With GB/T 6461-2002 "on the metal base metals and other inorganic coatings by etching after the test specimens and the rating of" Replace GB/T 6461-1988 "metal plating layer covering a sample rating for the substrate to cover the cathode layer after corrosion tests"; --- Increasing the reference standard GB/T 16545-1996 "Removal of corrosion products from corrosion of metals and alloys of the sample." The standard proposed by China Machinery Industry Federation. This standard layer Standardization Technical Committee (SAC/TC57) administered by the National Metal and non-metal cover. This standard was drafted. Wuhan Institute of Material Protection, Ma On Shan Ding Tai Rare Earth New Materials Co., Ltd., Zhejiang Xinfeng Holdings Limited Company, Beijing Yongtai and anti-corrosion Technology Co., Ltd. Drafters of this standard. Zhangsan Ping, Anjiang Feng, Zheng Penghua, Shi Zhimin, Zheng Xiulin, Liu Ji Lu, Zhang Hongwei, Zhengxiu Hai. This standard replaces the standards previously issued as follows. --- GB/T 9789-1988. GB/T 9789-2008/ISO 6988. 1985 Metallic and other inorganic coatings generally Gel Sulfur dioxide test conditions

1 Scope

This standard specifies the sulfur dioxide in the atmosphere and condensation of containing materials or test methods for corrosion resistance of the product. Wood standard applies to metallic coatings and inorganic coatings for corrosion tests. This standard does not apply to corrosion testing paints and varnishes cover layer. The test results can not be directly used as the test material in all kinds of environments encountered in the use of corrosion resistance guide also can not be Direct guidance materials for different relative corrosion resistance when in use.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms of 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. Rating of test specimens and the (GB/T 6461- after the metals and other inorganic coatings after corrosion test GB/T 6461 metal matrix 2002, ISO 10289.1999, IDT) GB /Clear T 16545 corrosion test specimens of metals and alloys corrosion products (GB/T 16545-1996, idt ISO 8407.1991)

3 equipment and materials

3.1 Test Chamber Best to use volume 300dm3 ± 10dm3, its door should be tightly closed, and fitted with 3.2,3.3,3.4 as specified components. Typical door and bell chamber shown in Figure 1. 3.1.1 Structural Materials All structural materials used in the chamber should be resistant to moisture corrosive sulfur dioxide atmosphere, and these materials themselves may not be released for Corrosive gas or vapor sample any impact. The lower part of the tank wall and the bottom should be able to heat, and can accommodate at least about 2.5dm3 dissolved sulfur dioxide in water without leakage. Suitable materials for lead pack In these areas and as a box frame and joint material. Before the new box used as a test, at least should be no-load operation (not placed in the sample) a period of normal operation steps. It should be fed 2dm3 sulfur dioxide gas, in order to reduce structural materials due to the atmosphere inside the steam risk of contamination. 3.1.2 Shape Chamber shape allows for some changes, but the moisture condensation on the lid can not drip onto the inside of the sample, the tank top and the big plane About a 12 ° angle, and you can meet the requirements. 3.1.3 Install Chamber should be installed in a clean room atmosphere, and make it not to be too fast or large temperature fluctuations and direct sunlight and strong Stream interference (see 6.5.2). 3.2 thermostat Temperature control device includes a safety thermometer in the upper part of the chamber and a temperature sensor readings from outside the test chamber, the thermometer Mercury ball from the top of the box and the box door 150mm, distance from the nearest tank wall is 250mm. GB/T 9789-2008/ISO 6988. 1985

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