ISO 8289-2-2019 PDF

Full title and description

ISO 8289-2:2019 — Vitreous and porcelain enamels — Low-voltage test for detecting and locating defects — Part 2: Slurry test for profiled surfaces. This part specifies an optical, low-voltage slurry (barbotine) test tailored to corrugated, undulated or otherwise profiled enamelled surfaces to detect pores, cracks or pop-offs that extend to the metal base.

Abstract

This document defines a non-destructive, colour-effect (optical) low-voltage slurry test method for precise detection and localisation of defects in enamel coatings on profiled surfaces (corrugated and/or undulated). The method is intended for defects that extend through the enamel to the underlying metal and is explicitly distinct from the high-voltage test methods.

General information

• Status: Published; confirmed (reviewed and confirmed in 2024).
• Publication date: March 2019 (Edition 1, published 20 March 2019).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.220.50 (Enamels).
• Edition / version: Edition 1 (2019).
• Number of pages: 4 pages (concise technical specification).

Scope

Specifies a low-voltage slurry (optical) test for detecting and locating defects — pores, cracks or pop-offs — in vitreous and porcelain enamel coatings on profiled (non-flat) surfaces such as corrugated or undulated shapes, where defects extend to the metal base. The method is intended for precise localisation on complex surface geometries and is a non-destructive complement to high-voltage testing methods.

Key topics and requirements

• Definition of the slurry (barbotine) optical low-voltage test procedure for profiled enamelled surfaces.
• Detection targets: pores, cracks and pop-offs that penetrate to the base metal.
• Application to non-flat, corrugated or undulated geometries where swab/electrical methods for flat surfaces are less effective.
• Requirements for test materials, preparation, application and observation of colour effects (optical indicators) to locate defects.
• Non-destructive nature of the low-voltage optical method and guidance on interpretation versus high-voltage test results.
• Reference and differentiation from high-voltage test methods (results are not directly comparable).

Typical use and users

Used by enamel manufacturers, coating process engineers, quality-control and inspection laboratories, third‑party testing bodies, and R&D groups working on enamel coatings. Typical use cases include production-line quality checks on profiled panels, incoming inspection of enamelled components, failure investigation and conformity verification to client or regulatory requirements.

Related standards

Closely related to ISO 8289-1:2020 (Part 1 — swab test for non-profiled/flat surfaces) which covers low-voltage swab and electrical methods for flat surfaces; ISO 8289-2 complements Part 1 for profiled shapes. The standard explicitly contrasts low-voltage methods with the high-voltage test specified in ISO 2746 (high-voltage test for enamel defect detection). National and regional adoptions exist (for example EN/BS/ÖNORM variants adopting the ISO text).

Keywords

Vitreous enamel; porcelain enamel; low-voltage test; slurry test; barbotine; defect detection; pores; cracks; pop-offs; profiled surfaces; corrugated; undulated; non-destructive testing; ISO 8289-2:2019.

FAQ

Q: What is this standard?

A: ISO 8289-2:2019 is an ISO International Standard that specifies a low‑voltage optical slurry test method for detecting and locating defects in vitreous and porcelain enamel coatings on profiled surfaces.

Q: What does it cover?

A: It covers the slurry (barbotine) optical test procedure, test materials and application, observation of colour effects to reveal defects that penetrate to the metal base, and guidance on use for corrugated/undulated or otherwise profiled enamelled surfaces.

Q: Who typically uses it?

A: Enamel producers, coating and process engineers, inspection and testing laboratories, purchasers specifying enamel quality, and researchers dealing with enamel coating integrity on profiled components.

Q: Is it current or superseded?

A: The standard was published in March 2019 (Edition 1) and was reviewed and confirmed in 2024; it remains the current ISO document for the slurry low‑voltage test on profiled surfaces.

Q: Is it part of a series?

A: Yes — ISO 8289 has been split into parts. ISO 8289-1:2020 covers swab/electrical methods for non-profiled (flat) surfaces, while ISO 8289-2:2019 covers the slurry optical method for profiled surfaces. The original ISO 8289 (2000) was superseded by these parts.

Q: What are the key keywords?

A: Low-voltage test, slurry (barbotine) test, vitreous enamel, porcelain enamel, defect detection, profiled/corrugated surfaces, non-destructive testing, ISO 8289-2:2019.