ISO 9227-2022 amd1-2024 PDF

Full title and description

St ISO 9227-2022 amd1-2024 — Corrosion tests in artificial atmospheres — Salt spray tests. This entry covers the ISO international standard ISO 9227:2022 (edition 5) and its Amendment 1 published in 2024 (footnote of warning), adopted as St ISO 9227-2022 with the 2024 amendment.

Abstract

Specifies apparatus, reagents and procedures for conducting neutral salt spray (NSS), acetic acid salt spray (AASS) and copper‑accelerated acetic acid salt spray (CASS) tests to assess corrosion resistance of metallic materials and coatings; describes evaluation of cabinet corrosivity but does not prescribe specimen dimensions, exposure periods or interpretation of results (those are left to product specifications). Amendment 1 (2024) adds a footnote of warning to the published 2022 text.

General information

• Status: Published / Current (base standard and published amendment).
• Publication date: ISO 9227: 2022‑11 (base standard); Amendment 1: 2024‑06.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 77.060 — Corrosion of metals.
• Edition / version: Edition 5 (ISO 9227:2022) with Amendment 1 (ISO 9227:2022/Amd 1:2024).
• Number of pages: Base document: 23 pages; Amendment 1: 1 page (footnote of warning).

Scope

Defines requirements for performing salt spray (fog) corrosion tests — NSS, AASS and CASS — including test solutions and their preparation, apparatus design and calibration, operating conditions and monitoring, specimen treatment and reporting. It also describes procedures to evaluate the corrosivity of the test cabinet environment. The standard does not fix exposure durations, specimen sizes or pass/fail criteria (these are specified by product or sector requirements).

Key topics and requirements

• Definitions and purpose of NSS, AASS and CASS test variants (neutral, acetic acid and copper‑accelerated acetic acid salt spray).
• Composition and quality of test solutions (approx. 5 % NaCl solution and pH control for each test type).
• Apparatus requirements: chamber design, nozzle/atomizer, specimen positioning and prevention of condensate drip.
• Operating conditions and controls: chamber temperature, fallout (spray) rate and pH monitoring, calibration and daily checks.
• Test reporting: specimen identification, test conditions, duration, observed corrosion phenomena and any deviations from the standard.
• Amendment‑level change: Amd 1 (2024) inserts a footnote of warning (clarifying or highlighting safety/interpretation aspects).

Typical use and users

Used by corrosion test laboratories, coating and plating manufacturers, automotive and aerospace OEMs, quality assurance teams, materials engineers and research organizations for comparative testing, process control and qualification of metallic materials and protective coatings. Salt spray testing is widely used as a reproducible, accelerated quality/control test rather than a direct life‑expectancy predictor.

Related standards

Commonly referenced alongside ASTM B117 (salt spray test), national/adopted EN or JIS versions (EN ISO 9227, JIS Z 2371) and sector‑specific test methods (including ASTM G85 variants). Users should confirm which edition/adoption their contract or specification mandates.

Keywords

Salt spray, salt fog, neutral salt spray (NSS), acetic acid salt spray (AASS), copper‑accelerated acetic acid salt spray (CASS), corrosion testing, test chamber, ISO 9227, accelerated corrosion, coatings evaluation.

FAQ

Q: What is this standard?

A: ISO 9227 is the international standard that specifies how to conduct standardized salt spray (fog) corrosion tests (NSS, AASS, CASS) to assess corrosion resistance of metals and coatings. The 2022 edition is Edition 5 and it has a 2024 Amendment 1 (footnote of warning).

Q: What does it cover?

A: It covers apparatus, reagents, solution preparation, operating conditions, monitoring and reporting for salt spray tests and includes methods to evaluate the corrosivity of the test cabinet environment; it does not set specimen sizes, exposure times or pass/fail criteria.

Q: Who typically uses it?

A: Test laboratories, coating/plating suppliers, manufacturers (automotive, aerospace, industrial), materials engineers and QA/QC teams use ISO 9227 for comparative testing, process control and product qualification.

Q: Is it current or superseded?

A: The current published edition is ISO 9227:2022 (Edition 5). Amendment 1 was published in June 2024; earlier editions (for example 2017) have been superseded by the 2022 edition.

Q: Is it part of a series?

A: ISO 9227 is a standalone test method within ISO/TC 156 work on corrosion tests; related documents and national/adopted variants (EN ISO 9227, JIS Z 2371) and complementary corrosion test standards (e.g., ASTM B117, ASTM G85) are often used together in product specifications.

Q: What are the key keywords?

A: Salt spray, NSS, AASS, CASS, corrosion, test chamber, salt fog, coatings, ISO 9227.