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GB/T 19292.2-2018Corrosion of metals and alloys -- Corrosivity of atmospheres -- Part 2: Guiding values for the corrosivity categories (English PDF)

金属和合金的腐蚀大气腐蚀性第2部分：腐蚀等级的指导值

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

May 14, 2018

Implementation date

February 1, 2019

Scope

GB/T 19292.2-2018 is the English-translated version of 金属和合金的腐蚀大气腐蚀性第2部分：腐蚀等级的指导值.

GB/T 19292.2-2018 is the Chinese standard "Corrosion of metals and alloys -- Corrosivity of atmospheres -- Part 2: Guiding values for the corrosivity categories".

Its scope clause reads: This part of GB/T 19292 stipulates the corrosion guide values for metals and alloys exposed to the outdoor natural atmosphere for more than one year. this Partially used in conjunction with GB/T 19292.1.

The guideline gives the corrosion rate of standard structural materials. These data can be used for engineering calculations. The guideline specifies the standard metal for each Corrosive grade technical content.

Appendix A gives an example of the calculation of the maximum corrosion loss for six standard corrosion grades with a maximum exposure time of 20 years. Appendix B gives the average corrosion rate and steady-state corrosion rate for the initial exposure to standard metal in six standard corrosion grades.

Appendix C gives the method of calculating the corrosion loss based on the composition of the steel. Its clauses include terms and definitions.

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Document preview — GB/T 19292.2-2018

National Standard of the People's Republic of China

ICS: 77.060
Classification: H 25
Replacing: GB/T 19292.2-2003

Issued by: State Administration for Market Regulation, China National Standardization Administration

1 Scope
2 Normative references
3 Terms and Definitions
3.1 Guideline valueguidingcorrosionvalue
3.2 Long-term corrosion rate
3.3 Average corrosion rate (rav)
3.4 Steady-state corrosion rate (rlin)

1 Scope

This part of GB/T 19292 stipulates the corrosion guide values for metals and alloys exposed to the outdoor natural atmosphere for more than one year. this

Partially used in conjunction with GB/T 19292.1.

The guideline gives the corrosion rate of standard structural materials. These data can be used for engineering calculations. The guideline specifies the standard metal for each

Corrosive grade technical content.

Appendix A gives an example of the calculation of the maximum corrosion loss for six standard corrosion grades with a maximum exposure time of 20 years.

Appendix B gives the average corrosion rate and steady-state corrosion rate for the initial exposure to standard metal in six standard corrosion grades.

Appendix C gives the method of calculating the corrosion loss based on the composition of the steel.

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 version (including all amendments) applies to this document.

GB/T 10123 Basic terms and definitions for corrosion of metals and alloys (GB/T 10123-2001, eqvISO 8044.1999)

GB/T 19292.1 Corrosion of metals and alloys - Atmospheric corrosion - Part 1. Classification, determination and evaluation (GB/T 19292.1-

2018, ISO 9223.2012, IDT)

GB/T 19355.1 Guidelines and recommendations for corrosion protection of zinc-coated steel structures Part 1. Basic principles of design and corrosion protection (GB/T 19355.1-2016, ISO 14713-1.2009, MOD)

3 Terms and Definitions

The terms and definitions defined in GB/T 10123 and the following apply to this document.

3.1 Guideline valueguidingcorrosionvalue

Corrosion rate, weight loss, penetration, or other corrosion characteristics characterize the atmospheric corrosion behavior of standard metals at a given level of corrosivity.

3.2 Long-term corrosion rate

Exposure to corrosion rates of more than 1 year.

3.3 Average corrosion rate (rav)

The average corrosion rate of metals exposed to the atmosphere for the first 10 years.

3.4 Steady-state corrosion rate (rlin)

The corrosion rate of metals after prolonged exposure in the atmosphere does not include the initial stage.

Note. In this section, the corrosion rate after 10 years exposure is considered to be constant.

GB/T 18590 | GB/T 19292.4 | GB/T 19292.1 | GB/T 17897 | GB/T 10127 | GB/T 19292.3 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 22 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 9223.2012 · ISO 14713

Cited by

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