Home / Standards / GB/T 38933-2020 GB/T 38933-2020 Active Cold rolled steel sheet for automobile—Test method of phosphate conversion coatings 汽车用冷轧钢板 磷酸盐转化膜试验方法 Standard Type GBT ICS 77.140.50 CCS H46 Status 现行 Issue Date 2020-06-02 Implementation 2021-01-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A