GB/T 42672-2023 English PDF

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GB/T 42672-2023: Corrosion of metals and alloys - Monitoring methods of environment factors for exposure corrosion tests in surface seawater
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Basic data

Standard ID: GB/T 42672-2023 (GB/T42672-2023)
Description (Translated English): Corrosion of metals and alloys - Monitoring methods of environment factors for exposure corrosion tests in surface seawater
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H25
Classification of International Standard: 77.060
Word Count Estimation: 14,125
Date of Issue: 2023-08-06
Date of Implementation: 2024-03-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42672-2023: Corrosion of metals and alloys - Monitoring methods of environment factors for exposure corrosion tests in surface seawater

---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.
ICS 77.060 CCSH25 National Standards of People's Republic of China Corrosion of metals and alloys Surface seawater exposure test environmental factors monitoring method Published on 2023-08-06 2024-03-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Table of contents

Preface III 1 Scope 1 2 Normative reference documents 1 3 Terms and Definitions 1 4 Principle 1 5 General requirements 2 6 sea water temperature 2 7 Salinity and Conductivity3 8 pH 3 9 Dissolved Oxygen 3 10 Turbidity 3 11 Sand content 4 12 flow rate 4 13 Fouled Creatures 4 14 Data record 5 Appendix A (Informative) Record Form 7 Reference 9

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by the China Iron and Steel Industry Association. This document is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). This document was drafted by. Qingdao Gangyan Nak Detection and Protection Technology Co., Ltd., Metallurgical Industry Information Standards Research Institute, and Iron and Steel Research Institute Qingdao Marine Corrosion Research Institute Co., Ltd. The main drafters of this document. Ding Guoqing, Hou Jie, Yang Zhaohui, Tian Zijian, Yang Haiyang, Li Qian, Liu Kaiji. Corrosion of metals and alloys Surface seawater exposure test environmental factors monitoring method

1 Scope

This document specifies the test methods for monitoring environmental factors in surface seawater environmental exposure corrosion tests, including seawater temperature, salinity, conductivity, Monitoring methods for environmental factors such as pH, dissolved oxygen, turbidity, sand content, flow rate, fouling organisms, etc. This document is applicable to the monitoring of surface seawater environmental factors, and the monitoring of freshwater environmental factors can also be implemented with reference.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 5776 Corrosion of metals and alloys Guidelines for exposure and assessment of metals and alloys in surface seawater GB/T 10123 Corrosion terminology for metals and alloys GB/T 12519 General technical conditions for analytical instruments GB 17378.4-2007 Marine Monitoring Specifications Part 4.Seawater Analysis

3 Terms and definitions

The terms and definitions defined in GB/T 10123, GB/T 12519 and the following apply to this document. 3.1 surface seawatersurfaceseawater The depth of natural seawater used when monitoring environmental factors in seawater corrosion test stations generally does not exceed 5m. 3.2 routinemonitoringroutinmonitoring Continuous environmental factor monitoring required by GB/T 5776 when conducting seawater corrosion tests on the surface of metal materials. 3.3 special monitoringspecialmonitoring Periodic monitoring of environmental factors during the pilot study based on research needs.

4 Principles

The degree of corrosion damage, corrosion type and mechanism of metals and alloys (including materials, products, components, equipment and facilities, etc.) in seawater are related to the seawater Water environment factors (parameters) are closely related. GB/T 5776 stipulates that appropriate monitoring locations should be selected when conducting surface seawater exposure corrosion tests. Conduct tests on major seawater environmental factors. The seawater environmental factors that affect the corrosion of metals and alloys can be divided into chemical factors, physical factors and biological factors. The seawater environment usually involves Factors mainly include seawater temperature, salinity, conductivity, pH, dissolved oxygen, turbidity, sand content, flow rate, fouling organisms, etc. ......

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