Paints and varnishes - Corrosion protection of steel structures by protective paint systems - Part 4: Types of surface and surface preparation (ISO 12944-4:2017)
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.
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