ISO 16539-2013 PDF

Full title and description

Corrosion of metals and alloys — Accelerated cyclic corrosion tests with exposure to synthetic ocean water salt-deposition process — "Dry" and "wet" conditions at constant absolute humidity. This International Standard specifies two accelerated cyclic corrosion test procedures (Methods A and B) and the apparatus used for evaluating the corrosion behaviour of surface-treated metals and their alloys, with and without paint, using sea-salt deposition under controlled dry/wet cycles.

Abstract

This standard defines two accelerated corrosion test procedures (Method A and Method B) involving controlled salt deposition from synthetic ocean water and alternating dry and wet exposure at a constant absolute humidity to assess corrosion performance of metals, corrosion-resistant alloys and coated metals. Method A is intended for metals and their alloys (including corrosion‑resistant alloys); Method B applies to metals and alloys including specimens with metallic and organic coatings.

General information

• Status: Published (confirmed current following ISO systematic review).
• Publication date: March 2013 (2013-03).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 77.060 (Corrosion of metals and alloys).
• Edition / version: Edition 1 (2013).
• Number of pages: 19.

Scope

ISO 16539:2013 specifies two accelerated cyclic corrosion test methods based on controlled deposition of synthetic ocean water (sea-salt), and alternating dry and wet exposure at a fixed absolute humidity. It covers the apparatus requirements, test cycles and applicability: Method A for metals and alloys (including corrosion‑resistant alloys) and Method B for metals and alloys with or without coatings (including metallic, conversion and organic coatings). The procedures are intended for laboratory evaluation of atmospheric corrosion behaviour under sea-salt deposition conditions.

Key topics and requirements

• Two defined test procedures (Method A and Method B) for accelerated cyclic corrosion testing under salt-deposition and dry/wet cycles.
• Specification of synthetic ocean water (sea-salt) deposition method and control of deposition amount and uniformity.
• Controlled "dry" and "wet" phases at constant absolute humidity to reproduce cyclic atmospheric exposure.
• Apparatus and chamber requirements including specimen mounting and environmental controls.
• Applicability notes for untreated metals, corrosion‑resistant alloys, and metal substrates with metallic or organic coatings; guidance on which method to apply for different specimen/coating types.

Typical use and users

Laboratories performing corrosion testing, coating manufacturers and formulators, automotive and marine component manufacturers, metal finishing and galvanizing operations, research institutions studying atmospheric/sea‑salt corrosion, and quality/acceptance testing groups use this standard to evaluate and compare corrosion resistance under controlled cyclic sea-salt exposure. The standard supports R&D, product development, quality control and comparative performance evaluation.

Related standards

Standards commonly referenced with or complementary to ISO 16539:2013 include ISO/AWI TR 8564 (reference data for ISO 16539:2013 Method B — work item under ISO/TC 156), ISO 9227 (salt spray tests — continuous/acce lerated salt fog methods used for complementary laboratory corrosion assessment), and ISO 12944 (paints and varnishes — corrosion protection of steel structures by protective paint systems) for specification and performance context of coatings. These documents are used together to define test selection, interpretation and protective-system specification.

Keywords

accelerated cyclic corrosion test, salt deposition, synthetic ocean water, sea-salt, dry/wet cycle, constant absolute humidity, Method A, Method B, corrosion testing, metals and alloys, coatings, atmospheric corrosion.

FAQ

Q: What is this standard?

A: ISO 16539:2013 is an International Standard that defines two accelerated cyclic corrosion test methods (Methods A and B) using synthetic ocean water salt‑deposition and alternating dry/wet exposures at constant absolute humidity to evaluate corrosion behaviour of metals and coated metals.

Q: What does it cover?

A: It covers the test procedures, environmental cycle parameters (salt deposition, dry and wet phases at fixed absolute humidity), apparatus and specimen handling for assessing atmospheric corrosion caused by sea‑salt deposition. Method A is aimed at metals and alloys; Method B is applicable to metals and alloys including those with metallic and organic coatings.

Q: Who typically uses it?

A: Test laboratories, corrosion and materials engineers, coating manufacturers, automotive and marine OEMs, metal‑finishing operations, and research organizations use ISO 16539 to evaluate and compare corrosion performance in sea‑salt environments.

Q: Is it current or superseded?

A: ISO 16539:2013 was published in March 2013 (Edition 1) and was reviewed and confirmed as current by ISO during systematic review activities (confirmed in 2024). Users should check for any amendments or newer revisions before applying the standard in regulatory or contractual contexts.

Q: Is it part of a series?

A: ISO 16539 sits within ISO/TC 156 work on corrosion of metals and alloys; related documents and work items (for example ISO/AWI TR 8564 — reference data for Method B) and other corrosion/test standards (such as ISO 9227 and parts of ISO 12944) are commonly used alongside ISO 16539.

Q: What are the key keywords?

A: Accelerated cyclic corrosion, salt deposition, synthetic ocean water, sea-salt, dry/wet cycles, absolute humidity, Method A, Method B, corrosion testing, coatings.