Home / Standards / GB/T 9791-2025 GB/T 9791-2025 Active Metallic and other inorganic coatings—Chromate conversion coatings on zinc, cadmium, aluminium-zinc alloys and zinc-aluminium alloys—Test methods 金属及其他无机覆盖层 锌、镉、铝-锌合金和锌-铝合金的铬酸盐转化膜 试验方法 Standard Type GBT ICS 25.220.20 CCS A29 Status 现行 Issue Date 2025-10-31 Implementation 2026-05-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A