GB/T 31405-2015 English PDF

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GB/T 31405-2015: Standard test method for cathodic disbonding of pipeline coatings subjected to elevated temperatures
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 31405-2015	259	Add to Cart	3 days	Standard test method for cathodic disbonding of pipeline coatings subjected to elevated temperatures	Valid

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Basic data

Standard ID: GB/T 31405-2015 (GB/T31405-2015)
Description (Translated English): Standard test method for cathodic disbonding of pipeline coatings subjected to elevated temperatures
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A29
Classification of International Standard: 25.220.99
Word Count Estimation: 12,127
Date of Issue: 2015-05-15
Date of Implementation: 2015-10-01
Quoted Standard: SY/T 0037; SY/T 0066; SY/T 0094
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 accelerated test method for evaluating pipeline cathodic stripping the outer coating of high temperature performance. This Standard applies to cathodic protection and have higher than normal operating temperatures buried pipeline heat insulating outer coating of the cathode stripping performance comparison test. This Standard gives full immersion or soaked in a solution of hot cathode coating peeling performance test method. If the specimen requires testing at room temperature, can be SY/T 0037. If the specimen can not be submerged or soaked, you can use SY/T 0094.

GB/T 31405-2015: Standard test method for cathodic disbonding of pipeline coatings subjected to elevated temperatures

---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.
Standard test method for cathodic disbonding of pipeline coatings subjected to elevated temperatures ICS 25.220.99 A29 National Standards of People's Republic of China Pipeline corrosion resistant coating layer of high-temperature cathode peel test method Issued on. 2015-05-15 2015-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard is prepared in accordance with GB/T 1.1-2009 given rules. The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee anti-corrosion (SAC/TC381) centralized. This standard was drafted. China Petroleum Pipeline Technology Research Center, China Petroleum Pipeline Institute, Zhejiang, China for the existence Paint Co., Ltd., State industrial anti-corrosion Technology Association, Qingdao large warehouses anti-corrosion pipe insulation Equipment Co., Ltd. The main drafters of this standard. Hou Yu, Feng less wide, Liu Lingli, Liji grams by Wang, Li Rongguang, Zhao Xing, Linrong Fang, Li Guizhi, Jinhui, Praise, Zhang far, Zhang Zhen. Pipeline corrosion resistant coating layer of high-temperature cathode peel test method

1 Scope

This standard specifies the test method for evaluating the acceleration pipe outer layer of high-temperature corrosion cathodic stripping properties. This standard applies to cathodic protection and have higher than normal operating temperatures of buried pipeline coating heat insulating outer cathode release properties Comparison test. This standard gives all of submerged or soaked in a solution of hot cathode coating peeling performance test method. If the specimen requirements Measured at room temperature, can be SY/T 0037. If the specimen can not immerse or soak time, can be SY/T 0094.

2 Normative references

For the following documents referenced in this document it 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. SY/T 0037 pipeline coatings cathode peel test method Non-destructive measurement method SY/T 0066 Pipe Coating thickness (magnetic method) SY/T 0094 pipeline coatings peel test method for bonding cathode cell method

3 Methods Summary

3.1 before the start of the test, the coating manufacturing artifacts hole and then immersed in an electrolyte solution to the specimen, the specimen with the DC power supply Is connected to the negative electrode, the positive electrode and the auxiliary anode power supply is connected to a certain voltage is applied to the specimen by heating at a constant temperature means that the test situation Carried out under conditions. 3.2 Test test test at regular intervals during the loop current and the reference electrode specimen relative ratio of regular observation of coating peeling test pieces Situation after the end of the experiment measuring release coating area, and the test results were evaluated.

4 test device

4.1 Test Container Using non-reactive with the electrolyte solution and can withstand the temperature of the test material in the container, and adapted to the circulation of the electrolytic solution. through Often a diameter of about 300mm, a height of about 300mm, a volume of not less than 19L cylindrical containers of glass, the flat bottom of the container to accommodate Magnetic stir bar should rotate. Size of the container shall meet the following requirements. --- Specimen should be suspended vertically in the container, the lower end of the bottom of the container is not less than 25mm; Spacing between each other --- the specimen shall not be less than 38mm, hang vertically with the auxiliary anode is placed equidistant from each specimen, and not less than Specimen spacing; --- The distance from the specimen container sidewall is not less than 13mm; --- Depth electrolyte solution should ensure that the specimens immersed in, and in accordance with the relevant provisions of 6.2; --- Reference electrode can be placed anywhere within 38mm from the specimen container and the anode spacing of not less than. 4.2 auxiliary anode It should be low metal consumption, and even have been factory-sealed insulated copper wire. ......

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