GB/T 19292.3-2018Corrosion of metals and alloys -- Corrosivity of atmospheres -- Part 3: Measurement of environmental parameters affecting corrosivity of atmospheres (English PDF)

1 Scope

This part of GB/T 19292 specifies the method for the determination of environmental parameters for corrosion evaluation, using these parameters for GB/T 19292.1

Classification of atmospheric corrosivity.

The method for determining the environmental parameters specified in this section applies to.

--- Based on the normative corrosion evaluation of the corrosion rate of the first year of the standard sample;

--- Informational corrosion assessment based on exposed environmental characteristics.

This section does not describe the analytical methods commonly used in environmental parameter testing because they are derived from available analytical techniques in the laboratory.

The relationship between the specific test methods for SO2 and Cl-sedimentation rates and different test methods is in Appendix A, Appendix B, Appendix C, and

It is introduced in Record D, Appendix E, and Appendix F.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

Classification of corrosion and atmospheric corrosivity of ISO 9223 metals and alloys (Corrosionofmetalsandaloys-Corrosivity ofatmospheres-Classification,determinationandestimation)

ISO 11844-3 Corrosion of metals and alloys - Classification of atmospheric corrosion - Part 3

Environmental parameter determination (Corrosionofmetalsandaloys-Classificationoflowcorrosivityofindooratmospheres-

Part 3. Measurementofenvironmentalparametersaffectingindoorcorrosivity)

3 Principle

Environmental parameters and the different combinations between them can affect the corrosiveness of the atmosphere. Corrosion assessment (normative and information) is specified in ISO 9223

Two methods of sex.

In general, for standard procedures for corrosion evaluation, two sets of parameters need to be obtained or determined.

--- Humidity and temperature;

--- Air pollutants.

The standardized evaluation of corrosion is based on the information level of the main environmental parameters. temperature-humidity combined action, SO2 and airborne salt particle contamination dye. The primary purpose of testing these environmental parameters is to perform corrosion evaluation.

In addition to SO2 and Cl- in air pollutants, others such as NOx, O3, H2S, and HNO3 also affect the corrosion rate. Active rot of sediment

The etch components (SO2-4, NO-3, Cl-) react with metals in a humid environment and these factors are considered to be concomitant factors (see ISO 9223).

These environmental parameters that affect the corrosion of standard metal coupons under specific conditions are not the primary reference for ISO 9223 for atmospheric corrosion assessment.

number. However, the level of these parameter information contributes to the data corrosion assessment.

ISO 11844-3 gives an environmental parameter test method for low-corrosion classification of indoor air.

GB/T 18590 | GB/T 19292.1 | GB/T 19292.4 | GB/T 17897 | GB/T 10127 | GB/T 19292.2 | […]