EN ISO 12944-4:2017

European foreword
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

ISO 12944-4:2017 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.ISO 12944-4:2017 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 ISO 12944-4:2017.