Overview
ISO 16364:2026, Corrosion of metals and alloys - Guidelines for galvanic corrosion control, is an international standard published by ISO. It provides authoritative methods and guidelines for avoiding and controlling galvanic corrosion in metallic and alloy components, especially in the design stage. The standard also addresses identifying the causes of corrosion damage, suppressing galvanic corrosion through recommended practices, and predicting corrosion performance using numerical simulations.
As industries increasingly integrate multiple materials (metals, ceramics, composites, etc.), managing galvanic corrosion has become more critical to ensure the integrity and durability of structures in electronics, automotive, aerospace, marine, and civil engineering applications. ISO 16364:2026 supports engineers, designers, and asset managers in making informed decisions to extend the maintenance life and functionality of materials exposed to water, atmospheric, or soil environments.
Key Topics
ISO 16364:2026 covers several essential aspects of galvanic corrosion management:
- Corrosion Mechanisms: Explains the principles behind galvanic corrosion, including the role of dissimilar metals, electrical contact, and electrolytes.
- Design Guidelines: Outlines a step-by-step material design flowchart to help avoid galvanic corrosion. This includes:
- Assessing direct or indirect electrical contact between dissimilar conductive materials
- Verifying the presence of common electrolytes
- Identifying corrosion-accelerating structures and modifying design when necessary
- Corrosion Prevention Methods: Details strategies to suppress galvanic corrosion, such as:
- Adjusting contact structure (e.g., adding insulating barriers)
- Material substitution to ensure similar corrosion potentials
- Applying surface treatments or protective coatings to isolate materials from electrolytes
- Modifying environmental conditions (e.g., reducing humidity or removing aggressive ions)
- Implementing electrochemical protection methods, such as cathodic protection
- Corrosion Prediction: Offers guidance on predicting galvanic corrosion using numerical calculations based on polarization data, employing finite element method (FEM) and boundary element method (BEM) simulations.
- Assessment and Reporting: Sets requirements for documenting test conditions, materials, environments, and results, aiding traceability and reproducibility.
Applications
ISO 16364:2026 is valuable across sectors where galvanic corrosion is a risk due to the use of dissimilar materials. Typical use cases include:
- Product and Structural Design: Ensuring long-term durability in automotive, aerospace, electronics, and infrastructure projects by integrating corrosion prevention from the outset.
- Maintenance and Inspection: Assessing corrosion damage and root causes to guide repair strategies and preventive measures.
- Material Selection: Supporting engineers in choosing compatible materials combinations to prevent premature failure.
- Process and Quality Control: Specifying testing procedures and assessment methods (including salt spray and cyclic corrosion testing) to validate corrosion resistance of assemblies.
- Numerical Modelling: Applying advanced simulation techniques (FEM/BEM) to predict corrosion rates and service life in diverse operating environments.
By following ISO 16364:2026, organizations can reduce unexpected failures, lower maintenance costs, and achieve compliance with international best practices for corrosion control.
Related Standards
For a comprehensive approach to corrosion control, ISO 16364:2026 references or aligns with other standards, including:
- ISO 7441: Corrosion of metals and alloys - Determination of bimetallic corrosion in atmospheric exposure corrosion tests
- ISO 21746: Composites and metal assemblies - Galvanic corrosion tests of carbon fibre reinforced plastics (CFRPs) - Salt spray tests
- ASTM G71: Standard Guide for Conducting and Evaluating Galvanic Corrosion Tests in Electrolytes
- ASTM G82: Standard Guide for Development and Use of a Galvanic Series for Predicting Galvanic Corrosion Performance
- ISO 9227: Corrosion tests in artificial atmospheres - Salt spray tests
Consult these related standards for detailed testing methodologies and supplementary guidance on corrosion modeling and evaluation.
Keywords: ISO 16364:2026, galvanic corrosion control, corrosion of metals, alloys, corrosion prevention, numerical simulation, design guidelines, material selection, corrosion testing, surface treatment, cathodic protection, corrosion standards.
