EN ISO 2376:2019 PDF

Anodizing of aluminium and its alloys - Determination of breakdown voltage and withstand voltage (ISO 2376:2019)

Title (English):

EN ISO 2376:2019

Anodizing of aluminium and its alloys - Determination of breakdown voltage and withstand voltage (ISO 2376:2019)

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 11
Publication date:: April 10, 2019
Edition:: CEN EN 2376 edition 2 version 1
ICS:: 25.220.20

Document language:

enru

Delivery time:1–7 days

Price:52 €

Description (English):

This document specifies test methods for the determination of the breakdown voltage and withstand voltage of anodic oxidation coatings on aluminium and its alloys, on flat or near-flat surfaces and on round wire. The methods are applicable to anodic oxidation coatings used primarily as electrical insulators. The methods are not applicable to coatings in the vicinity of cut edges, the edges of holes, or sharp changes of angle on, for example, extruded shapes. NOTE 1 Breakdown voltage and withstand voltage are affected by relative humidity. NOTE 2 The methods described do not give satisfactory results for unsealed coatings because they are affected by the humidity in particular.

Technical details

Technical committee: CEN/TC 132 - Aluminium and aluminium alloys
SKU: EN ISO 2376:2019

Abstract

Overview

EN ISO 2376:2019 (CEN adoption of ISO 2376:2019) defines standardized test methods for measuring the breakdown voltage and withstand voltage of anodic oxidation (anodized) coatings on aluminium and its alloys. The methods apply to coatings on flat or near‑flat surfaces and round wire that are intended primarily as electrical insulators. This edition supersedes EN ISO 2376:2010 and adds a formal withstand voltage test and additional guidance on test specimens.

Key topics and technical requirements

Scope and limitations
- Applicable to anodic oxidation coatings used as electrical insulation on aluminium and aluminium alloys.
- Not applicable to coatings near cut edges, hole edges, or sharp angle changes (e.g., certain extruded shapes).
- Results are affected by relative humidity; unsealed coatings give unreliable results because of moisture sensitivity.
Test principle
- Determine the voltage at which current first passes through the anodic coating (breakdown), and assess the ability to withstand a specified voltage without failure (withstand test).
Apparatus
- 50 Hz or 60 Hz power supply and AC transformer with near‑sinusoidal output.
- Voltage regulator with smooth ramping and controlled waveform.
- Current limiting resistor (0.5 MΩ) in series with the probe.
- RMS voltage measuring device.
- Electrode probe: spherical contact face 3–8 mm diameter; probe exerts 0.5–1.0 N (typical mass 50–100 g).
- Contact plate/probe or clip for earthing and making contact to base metal; twisting machine for round‑wire tests.
Specimen preparation
- Representative sampling from significant surfaces; avoid edges.
- Standard specimen size suggested 100 mm × 100 mm (alternatives by agreement).
- Clean with suitable organic solvent (e.g., ethanol); avoid solvents that leave protective films.
- Condition specimen in test environment >1 hour; test normally at room temperature and

Related standards

Mentioned in the description and other EN standards

Overview

Key topics and technical requirements

Scope and limitations
- Applicable to anodic oxidation coatings used as electrical insulation on aluminium and aluminium alloys.
- Not applicable to coatings near cut edges, hole edges, or sharp angle changes (e.g., certain extruded shapes).
- Results are affected by relative humidity; unsealed coatings give unreliable results because of moisture sensitivity.
Test principle
- Determine the voltage at which current first passes through the anodic coating (breakdown), and assess the ability to withstand a specified voltage without failure (withstand test).
Apparatus
- 50 Hz or 60 Hz power supply and AC transformer with near‑sinusoidal output.
- Voltage regulator with smooth ramping and controlled waveform.
- Current limiting resistor (0.5 MΩ) in series with the probe.
- RMS voltage measuring device.
- Electrode probe: spherical contact face 3–8 mm diameter; probe exerts 0.5–1.0 N (typical mass 50–100 g).
- Contact plate/probe or clip for earthing and making contact to base metal; twisting machine for round‑wire tests.
Specimen preparation
- Representative sampling from significant surfaces; avoid edges.
- Standard specimen size suggested 100 mm × 100 mm (alternatives by agreement).
- Clean with suitable organic solvent (e.g., ethanol); avoid solvents that leave protective films.
- Condition specimen in test environment >1 hour; test normally at room temperature and

EN ISO 2376:2019 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

Related standards

Anodizing of aluminium and its alloys — Determination of breakdown voltage and withstand voltage

Anodizing of aluminium and its alloys — Determination of electric breakdown potential

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