SIST EN ISO 6860:2006 PDF

Name: SIST EN ISO 6860:2006 — Paints and varnishes - Bend test (conical mandrel) (ISO 6860:2006)
SKU: SIST EN ISO 6860:2006
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Paints and varnishes - Bend test (conical mandrel) (ISO 6860:2006)

Название (английский):

SIST EN ISO 6860:2006

Paints and varnishes - Bend test (conical mandrel) (ISO 6860:2006)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 13
Дата публикации:: 1 мая 2006 г.
ICS:: 87.040
Технический комитет:: IBLP - Paints and varnishes

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Описание (английский):

ISO 6860:2006 describes an empirical test procedure for assessing the resistance of a coating of paint, varnish or related product to cracking and/or detachment from a metal substrate when subjected to bending around a conical mandrel under standard conditions. For a multi-coat system, each coat may be tested separately or the complete system may be tested.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN ISO 6860:2006 (ISO 6860:2006) specifies an empirical bend test (conical mandrel) used to assess the resistance of paint, varnish and related coatings to cracking and/or detachment from a metal substrate when bent around a conical mandrel. The procedure applies to single and multi-coat systems (each coat can be tested separately or the complete system) and is widely used for quality control, product development and comparative evaluation of coatings.

Key topics and technical requirements

Scope: Tests coating resistance to cracking/detachment under standard bending conditions.

Apparatus: A truncated conical mandrel mounted horizontally. Cone dimensions:

Small diameter d0 = 3.1 ± 0.1 mm
Large diameter d1 = 38 ± 0.1 mm
Length l = 203 ± 3 mm

Test panels / substrate: Burnished steel, burnished tinplate or soft aluminium, typically ~75 × 150 mm, max thickness 0.8 mm. For aluminium, metallurgical rolling direction should be 90° to the cone axis.

Coating preparation: Panels prepared per ISO 1514; coating thickness measured per ISO 2808. If brushed application is used, brush marks should be 90° to the cone axis.

Conditioning: Dry/stove and condition at (23 ± 2) °C and (50 ± 5) % RH for at least 16 h before testing.

Procedure:

Perform triplicate determinations.
Insert coated side toward draw bar, clamp, and bend the panel 180° over the cone in 2–3 s.
Optional incisions: parallel to short edges at 20 mm spacing to control crack propagation.
Examine immediately using ×10 magnification (or unaided eye if agreed), measure crack length from the small end to the last visible crack and report the mean in millimetres.

Precision: Repeatability r = 23 mm; reproducibility R = 46 mm.

Reporting: Include product ID, reference to ISO 6860:2006, test conditions, coating thickness, any deviations, measured result (nearest mm), examiner name and date.

Applications and users

Quality control in paint and varnish manufacturing.

R&D and product comparison for coating flexibility and adhesion performance.

Contract compliance for industrial coatings on metal substrates (automotive, appliances, metal furniture, architectural metalwork).

Primary users: coating formulators, testing laboratories, quality engineers, specification writers and regulatory bodies.

Related standards

ISO 1513, ISO 1514, ISO 15528, ISO 2808, ISO 3270

Complementary deformation/impact tests: ISO 1519 (cylindrical mandrel), ISO 1520 (cupping test), ISO 6272-1/2 (impact tests)

Keywords: EN ISO 6860:2006, ISO 6860, bend test, conical mandrel, paints and varnishes, coating cracking resistance, coating adhesion test, test panels.

SIST EN ISO 6860:2006 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

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