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prEN ISO 21227-4

Paints and varnishes - Evaluation of defects on coated surfaces using digital image processing - Part 4: Evaluation of filiform corrosion on coated corrosion test samples (ISO/DIS 21227-4:2026)

Publication date:   Mar 5, 2026

General information

40.60   Close of voting   May 25, 2026

CEN

CEN/TC 139 Paints and varnishes

European Norm

87.040   Paints and varnishes

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Scope

ISO 21227-4:2008 describes a method for evaluating filiform corrosion by means of digital optical imaging. Only the evalution procedure is described. The filiform corrosion itself is produced in accordance with other standards.

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EN ISO 21227-4:2008

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prEN ISO 21227-4
40.60 Close of voting
May 25, 2026