GB/T 32120-2022Covering corrosion control technology of oxidative polymerization for steel structures (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting.

This document replaces GB/T 32120-2015 "Steel Structure Oxidative Polymerization Coating Anticorrosion Technology", and is consistent with GB/T 32120-2015 In addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) Deleted the term "anti-corrosion mortar" (see 3.4 of the 2015 edition);

b) Delete the anti-corrosion mortar (see 5.2 of the 2015 edition);

c) Change "tensile strength" to "breaking strength" and change the corresponding requirements (see Table 2, Table 3 of the 2015 edition);

d) Added requirements and testing methods for "combustion performance" (see Table 2);

e) Delete the "ignition point" requirements and detection methods (see Table 4 of the 2015 edition);

f) Added steel structure surface treatment (see 6.2.1.2);

g) The filling of anti-corrosion mortar has been deleted (see 6.2.3 of the 2015 edition);

h) The total thickness of anti-corrosion paste and anti-corrosion tape has been changed (see 6.2.3.5, 6.2.4.5 of the 2015 edition);

i) The total thickness of the anti-corrosion layer has been changed (see 7.3.3, 7.3.3 of the 2015 edition);

j) The method of electric spark leak detection has been changed (see 7.4, 7.4 of the 2015 edition).

1 Scope

This document specifies the anti-corrosion layer structure, anti-corrosion layer material, construction, inspection and acceptance, Operation maintenance and management.

This document applies to the control of oxidation-polymerization-type cladding corrosion of steel structures in atmospheric environments.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 269 Determination of Penetration of Lubricating Grease and Petroleum Grease

GB/T 1462 Test method for water absorption of fiber reinforced plastics

GB/T 1725 Determination of non-volatile content of paints, varnishes and plastics

GB/T 1728 Determination of drying time of paint film and putty film

GB/T 1865 Paints and varnishes artificial weathering and artificial radiation exposure filtered xenon arc radiation

GB/T 2794 Determination of Viscosity of Adhesives Single-cylinder Rotational Viscometer Method

GB/T 3820 Determination of thickness of textiles and textile products

GB/T 3923.1 Tensile properties of textile fabrics - Part 1: Determination of breaking strength and elongation at break (strip method)

GB/T 6750 Determination of Density of Paints and Varnishes - Pycnometer Method

GB 8624-2012 Classification of combustion behavior of building materials and products

GB/T 8923.1-2011 Visual assessment of surface cleanliness of steel surface treatment before coating - Part 1: Uncoated The rust level and treatment level of the steel surface and the steel surface after the original coating has been completely removed

GB/T 8923.2-2008 Visual assessment of surface cleanliness of steel surface treatment before coating - Part 2: Coated The level of treatment after partial removal of the original coating on the steel surface

GB/T 10125 Artificial Atmosphere Corrosion Test Salt Spray Test

HB5351.5 Test methods for properties of investment casting coatings - Part 5: Determination of acidity by pH meter method

HB7736.2 Test methods for physical properties of prepregs for composite materials - Part 2: Determination of areal density

3 Terms and Definitions

The following terms and definitions apply to this document.