EN ISO 4528:2022 PDF

Overview

EN ISO 4528:2022 (ISO 4528:2022) provides guidance for selecting test methods to evaluate vitreous and porcelain enamel finishes on manufactured articles. Rather than giving acceptance criteria, this CEN-endorsed document maps the relevant ISO and European test methods to the performance properties required by specific enamelled articles. It is applicable to all enamelled articles irrespective of their base metal and supersedes EN ISO 4528:2015.

Key topics

• Purpose: guidance on the selection of test methods for assessing enamelled surface performance in different applications.
• Scope limitations: focuses mainly on test methods in ISO and EN standards; does not specify acceptance limits or pass/fail criteria.
• Method mapping: a comprehensive table correlates enamel surface properties to the ISO/EN test standards relevant for 30 specific types of enamelled articles.
• Representative properties and referenced tests include:
  • Chemical resistance / corrosion (ISO 28706 series, EN 1856-1)
  • Release of metal ions / food contact (ISO 4531)
  • Coating thickness (ISO 2178, ISO 2360)
  • Reflectivity / gloss and colour (ISO 2813; ISO 7724)
  • Continuity and porosity tests (ISO 8289 series; ISO 2746)
  • Thermal shock / heat resistance (ISO 2747; ISO 28763; ISO 4530)
  • Impact resistance and adhesion (ISO 4532; EN 10209 Annex C)
  • Abrasion, scratch resistance and hardness (ISO 6370-2; ISO 15695; EN 15771)

Practical applications

• Use EN ISO 4528:2022 to:
  • Define which standardized tests are appropriate for a given enamelled product (e.g., cookware, sinks, chimneys, domestic appliances).
  • Prepare test plans and quality-control procedures by selecting relevant ISO/EN methods for required properties.
  • Align supplier specifications, procurement documents and product standards with internationally recognized test methods.
  • Support conformity assessment and product development by ensuring the right performance attributes are tested.

Who should use this standard

• Manufacturers and processors of vitreous or porcelain enamelled products
• Quality assurance and laboratory testing teams
• Product designers and R&D engineers specifying enamel performance
• Procurement specialists and standards writers
• Certification bodies and technical regulators seeking consistent test method selection

Related standards and notes

• EN ISO 4528:2022 references numerous ISO and EN test methods (e.g., ISO 28706 series, ISO 4531, ISO 2178). It was prepared by ISO/TC 107 in cooperation with CEN/TC 262.
• Important: the document provides test method selection guidance only - acceptance criteria must be drawn from product specifications, contractual requirements or sector-specific standards.

By using EN ISO 4528:2022, stakeholders can ensure appropriate, standardized testing for vitreous and porcelain enamel finishes, improving reliability and comparability of enamelled surface performance results.