GB/T 30790.4-2014: Paints and varnishes -- Corrosion protection of steel structures by protective paint systems -- Part 4: Types of surface and surface preparation

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Scope

This Part of GB/T 30790 deals with the following types of surfaces of steel structures
consisting of carbon or low-alloy steel, and their preparation.
-- uncoated surfaces;
-- surfaces thermally sprayed with zinc, aluminium or their alloys;
-- hot-dip-galvanized surfaces;
-- zinc-electroplated surfaces;
-- sherardized surfaces;
-- surfaces painted with prefabrication primer;
-- other painted surfaces.
This Part defines a number of surface preparation grades but does not specify any
requirements for the condition of the substrate prior to surface preparation.
Highly polished surfaces and work-hardened surfaces are not covered by this Part.

Basic Data

Standard ID	GB/T 30790.4-2014 (GB/T30790.4-2014)
Description (Translated English)	Paints and varnishes -- Corrosion protection of steel structures by protective paint systems -- Part 4: Types of surface and surface preparation
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G50
Classification of International Standard	87.020
Word Count Estimation	22,246
Date of Issue	7/8/2014
Date of Implementation	12/1/2014
Quoted Standard	GB/T 8923.1; GB/T 8923.2; GB/T 9286; GB/T 9793; GB/T 13288.1; GB/T 13288.2; GB/T 13912; GB/T 17850.1; GB/T 17850.3; GB/T 17850.6; GB/T 18570.2; GB/T 18570.3; GB/T 18570.4; GB/T 18838.1; GB/T 18838.3; GB/T 18838.4; GB/T 18839.1; GB/T 18839.2; GB/T 18839.3;
Adopted Standard	ISO 12944-4-1998, 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 following types of carbon steel or low alloy steel surface and surface treatment: - uncoated surfaces; - thermal spraying of zinc, aluminum or alloy surface; - hot-dip galvanized surface; - galvanized surfaces; - sherardised su