GB/T 42672-2023Corrosion of metals and alloys—Monitoring methods of environment factors for exposure corrosion tests in surface seawater (English PDF)

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.

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.

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.