Page 80 - QRedition5.0 062021

Quality Requirements Edition 5.0 European Enamel Association

7.22.3 Quality requirements

Test method Requirement Remarks Frequency
4.3 thickness enamel coating 0.8 - 2.5 mm (cast iron) the coating thickness depends of the in consultation between enameller
1.0 - 2.2 mm (steel) enamels used and the intended use and customer
4.25 corrosion rate in sodium ≤ 0.40 mm/a when taking into production a sig.diff.
hydroxide solution enamel recipe, but at least 1 x a year
4.33 corrosion rate in ≤ 0.08 mm/a when taking into production a sig.diff.
hydrochloric acid enamel recipe, but at least 1 x a year
4.34 crack formation ≥ 190 °C when taking into production a sig.diff.
temperature enamel recipe, but at least 1 x a year

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