Home / Standards / GB/T 39637-2020 GB/T 39637-2020 Active Corrosion of metals and alloys—Classification of soil corrosivity 金属和合金的腐蚀 土壤环境腐蚀性分类 Standard Type GBT ICS 77.060 CCS H25 Status 现行 Issue Date 2020-12-14 Implementation 2021-07-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会