Page 90 - QRedition5.0 062021

Quality Requirements Edition 5.0 European Enamel Association

7.27 QUALITY REQUIREMENTS FOR PORCELAIN AND VITREOUS ENAMELLED SIGNS AND ADVERTISING BOARDS

7.27.1 Application area

This norm is applicable for enamelled signs and advertising boards of which the base material consists of steel.

7.27.2 Test methods

Item Name Comparable standards
4.2 measurement of the thickness of the base substrate metal EN 14127
4.3 measurement of the thickness of the enamel coating EN ISO 2178, EN ISO 2360, EN ISO 1463
4.4 determination of the resistance to chemical corrosion by citric acid
or other acids at room temperature EN ISO 28706-1/9
4.5 determination of the resistance to chemical corrosion by boiling citric acids EN ISO 28706-2/11, EN ISO 28706-2/6
4.9 determination of the resistance to impact ISO 4532
4.10 determination of the adherence of the enamel to the substrate EN 10209 Annex C
4.12 determination of the porosity by the high voltage test (destructive) ISO 2746, EN 14430
4.13 determination, detection and location of defects (non-destructive) EN ISO 8289-1, EN ISO 8289-2
4.18 determination of scratch resistance EN ISO 15695
4.26 determination of abrasion resistance ASTM C501
4.28 determination of the quality of steel for enamelling EN 10209 for cold rolled steel and EN 10025 or EN 10111 for hot rolled steel
or EN 10149 for HSLA steels
and EN 10222-1 for steel forgings for pressure applications

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