Note: JIS H 8625 is the Japanese Industrial Standard for . Deep Review: JIS H 8625 – The Benchmark for Architectural Anodizing 1. Executive Summary JIS H 8625 is not just a specification; it is the de facto global benchmark for high-performance architectural anodizing. While other standards (ISO 7599, AAMA 611, BS 3987) exist, JIS H 8625 is uniquely rigorous because it separates anodized finishes into two distinct classes (Class I and Class II) based on sealing quality and corrosion resistance , rather than just coating thickness.
The standard introduces the CASS Test (Copper Accelerated Acetic Acid Salt Spray) as mandatory for top-tier finishes. This is brutal. Many Western standards only require neutral salt spray (NSS). JIS H 8625 demands copper-accelerated testing to simulate severe marine/industrial environments. 3. The Critical Classification System | Feature | Class I (Superior) | Class II (General) | | :--- | :--- | :--- | | Min. Thickness | ≥ 9 µm (often spec’d higher) | ≥ 7 µm | | Sealing Quality | Excellent (Low admittance) | Good | | CASS Test (8 hrs) | No corrosion pits after 8h | Pits allowed but limited | | Application | Coastal areas, high pollution, curtain walls | Inland, mild environments, window frames | jis h 8625 pdf
JIS H 8625 is an excellent, demanding, and well-structured standard for architectural anodizing. Its reliance on CASS testing and quantitative admittance sets it apart from softer international standards. However, it is not the heaviest-duty standard (AAMA is tougher for coastal US), and its low thickness limit (9 µm) requires the specifier to add a note for aggressive environments. Note: JIS H 8625 is the Japanese Industrial Standard for