BS EN ISO 12944-4:2017

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 General
5 Types of surface to be prepared
6 Surface preparation methods
7 Surface preparation grades
8 Surface profile (roughness) and
   surface profile grading
9 Assessment of prepared surfaces
10 Temporary protection of prepared
   surfaces from corrosion and/or contamination
11 Preparation of temporarily or partly
   protected surfaces before application of
   further coatings
12 Preparation of hot-dip-galvanized surfaces
13 Preparation of thermally sprayed metal
   (zinc and aluminium) surfaces
14 Preparation of zinc-electroplated and
   sherardized surfaces
15 Preparation of other coated surfaces
16 Recommendations regarding pollution
   and the environment
17 Health and safety
Annex A (normative) - Standard preparation
        grades for primary (overall) surface preparation
Annex B (normative) - Standard preparation
        grades for secondary (partial) surface preparation
Annex C (informative) - Procedures for removal of
        extraneous layers and foreign matter, native layers
        and contaminants
Bibliography

Defines two methods for the determination of particle density of soils calculated from the mass and the volume of soil particles.

This document covers 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 document 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 document.