GB/T 39637-2020 English PDFUS$409.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 39637-2020: Corrosion of metals and alloys - Classification of soil corrosivity Status: Valid
Basic dataStandard ID: GB/T 39637-2020 (GB/T39637-2020)Description (Translated English): Corrosion of metals and alloys - Classification of soil corrosivity Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H25 Classification of International Standard: 77.060 Word Count Estimation: 22,283 Date of Issue: 2020-12-14 Date of Implementation: 2021-07-01 Quoted Standard: GB/T 10123-2001 Regulation (derived from): National Standard Announcement No. 28 of 2020 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration Summary: This standard specifies the classification of soil environment corrosion, the classification of soil environment corrosion based on the corrosion rate of metal standard specimens, and the evaluation of corrosion based on soil environment data. This standard is applicable to the classification and assessment of the corrosiveness of general soil environments. This standard does not apply to the classification and evaluation of the corrosiveness of special soil environments, such as soil environments with obvious AC and DC interference, soil environments with obvious regional inhomogeneities, and local soil environments polluted by other chemical substances. GB/T 39637-2020: Corrosion of metals and alloys - Classification of soil corrosivity---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.(Corrosion of metals and alloys Classification of environmental soil corrosion) ICS 77:060 H25 National Standards of People's Republic of China Corrosion of metals and alloys 2020-12-14 release 2021-07-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee ForewordThis standard was drafted in accordance with the rules given in GB/T 1:1-2009: This standard was proposed by the China Iron and Steel Association: This standard is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183): Drafting organizations of this standard: University of Science and Technology Beijing, Institute of Information Standards for Metallurgical Industry, Daqing Oilfield Engineering Co:, Ltd:, State Grid Shaanxi Provincial Power Power Research Institute of Power Company: The main drafters of this standard: Li Xiaogang, Hou Jie, Du Cuiwei, Li Qian, Liu Zhiyong, Sun Menghan, Zhang Dawei, He Shuquan, Ding De:IntroductionThe soil environment corrosion of materials is very complicated, and there are many influencing factors: The scientific classification of soil The selection, design, maintenance and failure prevention of engineering projects are of great importance to the national economy and national defense construction, scientific and technological progress and the sustainable development of society: Important meaning: my country has carried out a lot of scientific research in the classification of soil corrosiveness and achieved some results: But for a long time It is necessary to adopt simple index methods (such as conductivity method, multiple index method, etc:), consider the role of each index, and basically ignore the various elements of the soil The interaction between them is seriously out of touch with international advanced methods: Therefore, this type of method has major limitations, and misjudgments often occur: Through in-depth research on the corrosion behavior mechanism of metals and alloys in the soil environment, a scientific soil corrosion test and evaluation system has been established This classification and evaluation method mainly covers the corrosion rate of carbon steel, zinc, copper, and aluminum standard samples in the first year or the physical and chemical properties of the soil environment (Soil resistivity, redox potential, natural corrosion potential, soil pH, soil texture, soil moisture content, soil salt content, soil Cl- Content) two soil corrosion classification methods: This method is used to quickly and reliably analyze and evaluate the corrosion classification in the soil environment: Evaluation, and then guide the selection, design, maintenance, failure prevention and other processes of anti-corrosion engineering projects: Corrosion of metals and alloys1 ScopeThis standard specifies the classification of soil environmental corrosion, the classification of soil environmental corrosion based on the corrosion rate of metal standard specimens, and the Corrosion assessment of soil environmental data: This standard is applicable to the classification and assessment of the corrosiveness of general soil environments: This standard does not apply to the analysis of corrosive special soil environment Classification and evaluation, such as soil environment with obvious AC/DC interference, soil environment with obvious regional inhomogeneity, and other chemical pollution Local soil environment:2 Normative referencesThe following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article Pieces: For undated references, the latest version (including all amendments) applies to this document: GB/T 10123-2001 Basic terms and definitions for corrosion of metals and alloys3 Terms and definitionsThe following terms and definitions defined in GB/T 10123-2001 apply to this document: 3:1 Corrosivity of the soil The ability of soil and its constituent substances to cause corrosion of metals and alloys: 3:2 Soilresistivity The average value of soil resistance per unit length is an indicator of soil conductivity: Note: The unit is ohm meter (Ω·m): 3:3 Oxidation-reductionpotential The inert electrode is placed in a solution of an oxidant or a reducing agent to establish an equilibrium potential between its oxidation state and reduction state: Note: The electrode potential when the oxidized substances and reduced substances in the soil reach equilibrium on the redox electrode (usually platinum electrode): 3:4 Soil corrosion classification categoryofcorrosivityofsoil The soil corrosivity evaluation standard related to the corrosion effect of one year:4 Classification of soil environmental corrosion4:1 The soil environmental corrosivity is divided into 5 categories, and the grades are divided into 5 levels, see Table 1: The grade classification shall be tested for corrosion according to the requirements of Chapter 5: If it cannot be determined, the corrosiveness evaluation shall be carried out according to the requirements of Chapter 6: Corrosion assessment method is a conventional method, with certain uncertainty And limitations: 4:2 The corrosion classification determined by the corrosion weight loss in the first year reflects the specific soil environmental conditions in the year of burial: ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 39637-2020_English be delivered?Answer: Upon your order, we will start to translate GB/T 39637-2020_English as soon as possible, and keep you informed of the progress. 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