一、天津若丁 (一)天津若丁(旧)(又称五四牌若丁) 研制单位:天津市重工局化工试验所适用范围:钢铁材质酸洗用缓蚀剂完成日期:1953年10月 1952年2月天津钢铁工业局技术处安全技术科委托化工试验所剖析和研制当时由美国进口的“若丁”缓蚀剂,同年6月完成仿制工作,8月4日在天津钢厂首次试用证明具有抗腐蚀性能,但未记录详细 Tianjin Ruoding (a) Tianjin Ruoding (old) (also known as May Fourth brand Ruoding) Development Unit: Tianjin Heavy Industries Bureau Chemical Testing Scope: Steel pickling corrosion inhibitor Completion Date: 1953 10 Month February 1952 Tianjin Iron and Steel Bureau of Technology Security Technology Commission commissioned the Institute of Chemical Technology Laboratory analysis and development was then imported from the United States “Ruddin” corrosion inhibitor, in June the same year to complete the imitation work, August 4 in Tianjin for the first time Trial proved to have corrosion resistance, but did not record the details