ISO 8407:2021/Amd 1:2025

Overview

ISO 8407:2021/Amd 1:2025 is an important amendment to the international standard ISO 8407:2021, titled "Corrosion of metals and alloys - Removal of corrosion products from corrosion test specimens." Published by the International Organization for Standardization (ISO), this amendment refines procedures for effectively removing corrosion products from metal and alloy specimens used in corrosion testing. It ensures consistent, reliable, and reproducible cleaning methods that are essential for accurate corrosion evaluation in industrial and research settings.

The amendment introduces specific changes to chemical treatment protocols, reflecting advancements in methodology and safety. This standard is integral to corrosion testing processes and quality assurance programs involving metal corrosion behavior under various environmental conditions.

Key Topics

• Corrosion product removal: Procedures and chemical agents for cleaning corrosion test specimens without damaging the original metal surface.
• Use of sulfonic acid: Replacement of sulfuric acid with sulfamic acid for safer and more effective corrosion product elimination, reducing potential hazards and improving cleaning outcomes.
• Categorization of stainless steels: Clarification in the classification of stainless steel types for corrosion removal processes, enhancing precision in handling diverse alloy specimens.
• Standardization harmonization: Alignment with European norms via collaboration with the Comité Européen de Normalisation (CEN), ensuring global applicability and coherence.
• Technical committee collaboration: Developed by ISO/TC 156 and CEN/TC 262, focusing on the corrosion of metals, coatings, and test methodologies.

Applications

• Corrosion testing laboratories: Implementing updated cleaning procedures to prepare metal and alloy specimens accurately for evaluation without compromising material integrity.
• Quality control in manufacturing: Ensuring component materials meet corrosion resistance standards by consistent removal of corrosion products before analysis.
• Materials research and development: Supporting standardized testing protocols when developing new corrosion-resistant alloys or protective coatings.
• Industrial maintenance and inspection: Facilitating proper assessment of corrosion levels on service-exposed metals by using reliable cleaning methods described in the standard.
• Certification and compliance: Providing a reference for auditors and certification bodies verifying adherence to corrosion testing best practices.

Related Standards

• ISO 8407:2021 – Base standard covering the general guidelines for corrosion product removal on test specimens.
• ISO/IEC Directives, Part 1 and 2 – Documents detailing procedures for ISO standard development and editorial rules followed in this amendment.
• CEN/TC 262 standards – European standards on metallic and inorganic coatings related to corrosion protection and testing.
• ISO 9227 – Salt spray corrosion testing used alongside corrosion product removal procedures.
• ISO 8044 – Corrosion terminology and classification that underpin proper understanding of corrosion testing environments.

This amendment supports the ongoing improvement of corrosion testing accuracy through updated chemical protocols and refined specimen classification, enhancing the standard's practical value in corrosion science and industrial applications. For further information and updates, visit www.iso.org.