ISO 28706-1-2008 PDF

Full title and description

Vitreous and porcelain enamels — Determination of resistance to chemical corrosion — Part 1: Determination of resistance to chemical corrosion by acids at room temperature. Specifies a laboratory test method and a classification procedure for assessing how vitreous and porcelain enamelled articles resist attack by acidic liquids at ambient temperature.

Abstract

ISO 28706-1:2008 defines a standardized procedure to evaluate the resistance of vitreous and porcelain enamel surfaces to chemical attack by acids at room temperature. The standard covers specimen preparation, selection of test reagents, exposure conditions, evaluation criteria and classification of results to allow consistent comparison of enamel formulations and production batches.

General information

• Status: Published (confirmed as current following systematic reviews)
• Publication date: December 2008 (Edition 1, 2008)
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 25.220.50 (Enamels)
• Edition / version: Edition 1 (2008)
• Number of pages: 6

Scope

This part of ISO 28706 specifies a laboratory test method for determining the resistance of vitreous and porcelain enamelled articles to attack by acidic liquids at room temperature. It applies to enamelled surfaces where assessment under non‑heated, acid exposure conditions is relevant (e.g., certain domestic, sanitary or industrial applications). The standard provides requirements for test solutions, specimen preparation, exposure procedure, observation and a classification scheme for expressing results.

Key topics and requirements

• Definition of appropriate acidic test media and concentrations for room‑temperature testing.
• Specimen preparation and conditioning to ensure representative enamel surface and consistent test geometry.
• Exposure procedure: immersion/contact time, sample arrangement and environmental control at room temperature.
• Post‑exposure examination criteria: visual assessment, blistering, etching, loss of gloss, color change and weight change where applicable.
• Classification and expression of results using a defined rating scale so that resistance levels can be compared between samples.
• Requirements for reporting test conditions and results to ensure reproducibility (reagents, volumes, times, temperature, specimen identification).

Typical use and users

Used by manufacturers of vitreous and porcelain enamelled products (cookware, sanitary ware, tanks and process equipment), independent testing laboratories, quality control and assurance teams, research and development groups developing or comparing enamel formulations, and certification bodies assessing conformity for intended acid exposure at ambient conditions.

Related standards

ISO 28706-1:2008 is part of the ISO 28706 series dealing with chemical corrosion testing of vitreous and porcelain enamels. Other related parts include ISO 28706-2 (boiling liquids/vapours), ISO 28706-3 (alkaline liquids using hexagonal vessels or glass bottles), ISO 28706-4 (alkaline liquids using cylindrical vessels) and ISO 28706-5 (closed systems). Earlier standards replaced by this series include ISO 2722 and ISO 8290. The series is maintained by ISO/TC 107 (enamels).

Keywords

vitreous enamel, porcelain enamel, chemical corrosion, acid resistance, corrosion testing, classification, ISO 28706, enamel testing, ISO/TC 107

FAQ

Q: What is this standard?

A: ISO 28706-1:2008 is an international standard that specifies a laboratory method for determining the resistance of vitreous and porcelain enamelled surfaces to acids at room temperature and provides a classification system for results.

Q: What does it cover?

A: It covers selection of acidic test media, specimen preparation, exposure procedure at ambient temperature, criteria for post‑exposure assessment and a classification scheme for expressing corrosion resistance.

Q: Who typically uses it?

A: Manufacturers of enamelled products, independent testing laboratories, QC departments, R&D teams and certification bodies concerned with enamel performance under acid exposure at room temperature.

Q: Is it current or superseded?

A: The edition published in 2008 (Edition 1) remains the published part 1 of the ISO 28706 series. The ISO review/confirmation cycle has been completed for this document; users should verify whether any later amendments or newer parts of the series apply to their needs.

Q: Is it part of a series?

A: Yes — ISO 28706 is a multipart series addressing different chemical corrosion test methods for vitreous and porcelain enamels (Parts 1 through 5 cover different test media and apparatus/configurations).

Q: What are the key keywords?

A: vitreous enamel, porcelain enamel, acid resistance, chemical corrosion, corrosion testing, classification, ISO 28706-1.