ISO 2812-5:2018

Name: ISO 2812-5:2018 — Paints and varnishes — Determination of resistance to liquids — Part 5: Temperature-gradient oven method
SKU: ISO 2812-5:2018
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Paints and varnishes — Determination of resistance to liquids — Part 5: Temperature-gradient oven method

Название (английский):

ISO 2812-5:2018

Paints and varnishes — Determination of resistance to liquids — Part 5: Temperature-gradient oven method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 7
Дата публикации:: 3 августа 2018 г.
Издание:: ISO IS 2812 edition 2 version 1
ICS:: 87.040

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Описание (английский):

This document specifies a method, using a temperature-gradient oven, for determining the resistance of an individual-layer or multi-layer system of coating materials to the effects of liquids or paste-like products. This method enables the testers to determine the effects of the test substance on the coating and, if necessary, to assess the damage to the substrate.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 2812-5:2018 specifies the temperature‑gradient oven method for assessing the resistance of single‑layer or multi‑layer paint and varnish systems to liquids and paste‑like substances. The method exposes coated test panels to controlled droplets of test liquids across a linear temperature gradient, enabling determination of the temperature at which the coating first shows visible change and (if required) any substrate damage.

Key topics and requirements

Test principle: Apply defined droplets of test substance to a coated panel, insert horizontally into a gradient oven, expose, clean and visually assess for first visible change.

Gradient oven: Heats the substrate from the bottom to produce a linear temperature gradient (typical setting 35 °C to 80 °C). Gradient specification: 1 °C increase per 1.0 cm along the panel; maximum cross‑width gradient ≤ 2.5 °C. Heating bench design must ensure homogeneous heat transfer.

Test panels and coating:

Typical substrate: steel panels ~560 mm × 100 mm, 0.7–1.0 mm thick.
Coatings prepared per ISO 1514; dry film thickness measured per ISO 2808.
Condition panels ≥16 h at (23 ± 2) °C and (50 ± 5)% RH (ISO 3270) immediately before testing.

Test substances and volumes: Use one or more agreed liquids (examples in Annex A include 5% NaOH, 10% HCl, sulfuric acid solutions, water, resins, honey, simulated bird droppings). Droplet volumes typically 25–100 µl depending on substance.

Procedure parameters:

Apply droplets at room temperature (18–28 °C) on a lab bench, then insert panel and press to the heating bench.
Standard exposure: 30 minutes (unless otherwise agreed).
Clean residues (water or suitable solvent) and assess visually per ISO 13076; reassess after 24 h if not otherwise agreed.

Reporting and precision:

Report the temperature of first visible change and full test details (substrate, coating application, film thickness, test substances, gradient, deviations).
Precision: repeatability r = 4 °C (±2 °C), reproducibility R = 8 °C (±4 °C).

Applications and users

Evaluate chemical and biological liquid resistance of industrial, automotive, marine and architectural coatings.

Screen formulations during R&D for improved solvent, acid/base and biological‑stain resistance.

Support quality control, specification compliance and comparative performance claims.

Typical users:

Coating manufacturers, formulation scientists and R&D labs

Quality assurance and testing laboratories

Specifiers and procurement teams evaluating coating durability

ISO 2812-5:2018

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

Технические детали

ISO 15141:2018

Cereals and cereal products — Determination of ochratoxin A — High performance liquid chromatographic method…

BS EN ISO 2808:2019

Paints and varnishes. Determination of film thickness.

ISO 3270:1984

Paints and varnishes and their raw materials — Temperatures and humidities for conditioning and testing

BS EN ISO 13076:2019

Paints and varnishes. Lighting and procedure for visual assessments of coatings.

BS EN ISO 1513:2010

Paints and varnishes. Examination and preparation of test samples.

ISO 4618:2014

Paints and varnishes — Terms and definitions

BS EN ISO 15528:2020

Paints, varnishes and raw materials for paints and varnishes. Sampling.