一、前言 Nalco—165Ac是北京石油化工总厂前进化工厂裂解工段工艺循环冷却系统中应用的工艺缓蚀剂,原来从日本进口,现已仿制成功,由北京化工学院化工车间提供。目前要从理论上去指导缓蚀剂的选用尚存在许多困难。这是由于缓蚀机理的复杂性,腐蚀介质的多样性,缓蚀剂的高选择性 I. Introduction Nalco-165Ac is a corrosion inhibitor used in the process cycle cooling system at the cracking plant of Beijing Petrochemical Complex. It was originally imported from Japan and has been successfully imitated. It is provided by the chemical workshop of Beijing Institute of Chemical Technology. At present, there are still many difficulties in guiding the selection of corrosion inhibitors. This is due to the complexity of corrosion inhibition mechanisms, the diversity of corrosive media, the high selectivity of corrosion inhibitors