GB/T 30790.2-2014: Paints and varnishes -- Corrosion protection of steel structures by protective paint systems -- Part 2: Classification of environments

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Scope

1.1 This Part of GB/T 30790 deals with the classification of the principal environments
to which steel structures are exposed, and the corrosivity of these environments. It
-- defines atmosphere-corrosivity categories, based on mass loss (or thickness loss)
by standard specimens, and describes typical natural atmospheric environments
to which steel structures are exposed, giving advice on the estimation of the
corrosivity;
-- describes different categories of environment for structures immersed in water or
buried in soil;
-- gives information on some special corrosion stresses that may cause a significant
increase in corrosion rate or place higher demands on the performance of the
protective paint system.
The corrosion stresses associated with a particular environment or corrosivity category
represent one essential parameter governing the selection of protective paint systems.
1.2 This Part does not deal with the classification of those environments that consist
of special atmospheres (for example those in and around chemical and metallurgical
plants).

Basic Data

Standard ID	GB/T 30790.2-2014 (GB/T30790.2-2014)
Description (Translated English)	Paints and varnishes -- Corrosion protection of steel structures by protective paint systems -- Part 2: Classification of environments
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G50
Classification of International Standard	87.020
Word Count Estimation	14,156
Date of Issue	7/8/2014
Date of Implementation	12/1/2014
Quoted Standard	GB/T 19292.1; GB/T 19292.4; GB/T 30790.1; EN 12501-1
Adopted Standard	ISO 12944-2-1998, MOD
Regulation (derived from)	2014 National Standards Bulletin No. 18
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This standard specifies the classification of steel structures exposed to corrosive environments as well as those of the main environment. Including: - based on the quality loss (or thickness loss) defines the standard sample atmospheric corrosion levels,