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prEN ISO 28706-4

Vitreous and porcelain enamels - Determination of resistance to chemical corrosion - Part 4: Determination of resistance to chemical corrosion by alkaline liquids using a cylindrical vessel (ISO/DIS 28706-4:2025) prEN ISO 28706-4

Publication date:   Dec 11, 2025

General information

60.55   Ratification completed (DOR)   Apr 3, 2026

CEN

CEN/TC 262 Metallic and other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys

European Norm

25.220.50   Enamels

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Scope

ISO 28706-4:2016 describes a test method for the determination of the resistance of vitreous and porcelain enamelled articles to attack by alkaline liquids at temperatures between 25 °C and 95 °C. The apparatus used is a cylindrical vessel in which only one enamelled specimen is tested.
NOTE 1 The test method was initially set up for determination of the resistance of vitreous and porcelain enamels to a hot sodium hydroxide solution. Within the scope of this part of ISO 28706, the resistance of other alkaline liquids can be tested.
NOTE 2 This part of ISO 28706, which uses a cylindrical vessel, is generally used for tests carried out on vitreous and porcelain enamel coatings for the chemical industry.

Life cycle

PREVIOUSLY

PUBLISHED
EN ISO 28706-4:2016

NOW

IN_DEVELOPMENT
prEN ISO 28706-4
60.55 Ratification completed (DOR)
Apr 3, 2026




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