ISO 4623-2:2016

Name: ISO 4623-2:2016 — Paints and varnishes — Determination of resistance to filiform corrosion — Part 2: Aluminium substrates
SKU: ISO 4623-2:2016
Price: 25 EUR
Availability: InStock

Paints and varnishes — Determination of resistance to filiform corrosion — Part 2: Aluminium substrates

Название (английский):

ISO 4623-2:2016

Paints and varnishes — Determination of resistance to filiform corrosion — Part 2: Aluminium substrates

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 7
Дата публикации:: 28 июля 2016 г.
Издание:: ISO IS 4623 edition 2 version 1
ICS:: 87.040

Тип поставки:

Full version25 €Ask AI2 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:1 рабочий день

Цена:25 €

Описание (английский):

ISO 4623-2:2016 describes a test procedure for assessing the protective action of coatings of paints or varnishes on aluminium against filiform corrosion arising from a scribe mark cut through the coating. It is only suitable for assessing the performance of the coating/substrate combination tested. It is not suitable for predicting the performance of the coating on different substrates.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 4623-2:2016 - Paints and varnishes: Determination of resistance to filiform corrosion - Part 2: Aluminium substrates - specifies a laboratory test procedure to assess how well a paint or varnish coating protects aluminium substrates from filiform corrosion originating at an intentional scribe (break) in the coating. The standard defines sample preparation, scribing, acid vapour initiation, exposure conditions and evaluation criteria. It is applicable only to the specific coating/substrate combination tested and is not a predictive method for other substrates or systems.

Key topics and technical requirements

Scope and limitation: Evaluates the protective action of a given coating on aluminium only; not suitable for predicting performance on different substrates.

Sample preparation: Test panels conforming to ISO 1514; minimum size 100 × 70 × 0.8 mm; back and edges normally coated. Conditioning per ISO 3270.

Scribing details: Two perpendicular scribes per panel, each ≥ 30 mm long and 1–2 mm wide; debris removed and substrate visible (×10 magnification). If cladding exists, scribe depth 0.05–0.1 mm. Report scribe tool and orientation (rolling direction).

Initiation method: Introduction of hydrochloric acid vapour (analytical grade HCl 37 %) into an acid-resistant container. Typical dosage: ~20 ± 2 ml HCl per litre of container volume. Note: CASS (ISO 9227) can be used to initiate filiform corrosion for some materials.

Exposure conditions: Test cabinet at (40 ± 2) °C and (82 ± 5) % RH, panels positioned above the liquid at (100 ± 10) mm and at least 20 mm apart; panels usually held horizontally (orientation affects results).

Replication and timing: Tests normally carried out in triplicate. Panels preconditioned and exposed for the agreed test period with periodic inspections.

Evaluation metrics: Measure longest filament (L) and most frequent filament length (M) per ISO 4628-10; report results for each scribe separately and include coating thickness (ISO 2808).

Practical applications and users

ISO 4623-2:2016 is useful for:

Coatings manufacturers verifying formulation resistance on aluminium.

Corrosion engineers and test laboratories performing standardized durability testing.

Quality assurance and specification writers who need objective test methods for procurement and acceptance criteria.

R&D teams comparing coating systems or surface treatments for aluminium in marine/industrial environments.

This standard helps determine susceptibility to filiform corrosion-a common coating failure under humid, contaminated conditions-and supports product development, compliance testing and material selection.

Related standards

ISO 4623-1 (steel substrates)

ISO 4628-10 (assessment of filiform corrosion)

ISO 4628-8 (delamination/corrosion around a scribe)

ISO 1513, ISO 1514, ISO 15528 (sampling/preparation)

ISO 2808 (film thickness)

ISO 3270 (conditioning)

Keywords: ISO 4623-2:2016, filiform corrosion, aluminium substrates, paints and varnishes, scribe test, hydrochloric acid vapour, test cabinet, coating evaluation.

ISO 4623-2:2016

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Технические детали

ISO 15141:2018

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

ISO 3270:1984

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

ISO 9227:2017

Corrosion tests in artificial atmospheres — Salt spray tests

ISO 4628-10:2016

Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size of defects, a…

BS EN ISO 2808:2019

Paints and varnishes. Determination of film thickness.

ISO 4623-1:2018

Paints and varnishes — Determination of resistance to filiform corrosion — Part 1: Steel substrates

ISO 4628-8:2012

Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size of defects, a…

BS EN ISO 1513:2010

Paints and varnishes. Examination and preparation of test samples.