Overview
EN ISO 28706-2:2017 (ISO 28706-2:2017) is a CEN-adopted international test method for assessing the chemical corrosion resistance of vitreous and porcelain enamels on flat surfaces. The standard specifies procedures to determine enamel resistance to boiling acids, boiling neutral liquids, alkaline liquids and/or their vapours, allowing simultaneous evaluation of both the liquid and vapour phases of corrosive media. EN ISO 28706-2:2017 supersedes the 2011 edition and is intended for use in quality control, product specification and comparative testing.
Key Topics
- Scope and principle: Describes the aim of measuring enamel degradation when exposed to aggressive boiling media and vapours.
- Test solutions and conditions: Includes specific procedures for common corrosive media such as boiling citric acid, sulphuric acid, hydrochloric acid, boiling distilled/demineralized water, standard detergent solutions and provisions for other test liquids.
- Apparatus and materials: Defines required test equipment, packing rings and specimen preparation for reproducible results.
- Test procedure: Stepwise method for exposure, handling and post-test evaluation to ensure consistent corrosion assessment.
- Expression of results: Provides metrics such as total loss in mass per unit area and corrosion rate to quantify material performance.
- Reporting requirements: Specifies the information to be recorded in the test report for traceability and comparison.
Applications
EN ISO 28706-2:2017 is used where reliable corrosion resistance data for vitreous and porcelain enamel coatings is required:
- Quality control in enamel production and application lines.
- Materials selection for cookware, sanitary ware, appliances, chemical processing equipment and architectural products with enamel surfaces.
- Laboratory testing and certification to verify compliance with customer or regulatory corrosion performance criteria.
- R&D and failure analysis to compare formulations, firing schedules or surface preparations.
Typical users include enamel manufacturers, coating formulators, laboratory technicians, product designers, certification bodies and procurement/specification teams.
Related standards
- Part of the ISO 28706 series covering test methods for enamel coatings (see other parts of ISO 28706 for complementary methods).
- Adopted as a CEN standard (EN ISO 28706-2:2017), ensuring harmonized use across member countries.
Keywords: EN ISO 28706-2:2017, ISO 28706-2, vitreous and porcelain enamels, chemical corrosion resistance, boiling acids, corrosion testing, enamel durability, test method.
