1 引言 有机缓蚀剂分子中一般含有带孤对电子的杂原子—非碳、非氢的第三类原子。这些杂原子作为电子给体,使缓蚀剂具有Lewis碱的性质,对介质产生碱性效应,常常会增强缓蚀效果。更为重要的是,它们的存在提供了形成表面络合物或螯合物的可能性。一般认为,表面络合物或螯合物的形成是产生缓蚀作用的重要原因。 氮原子是有机缓蚀剂中最常见的杂原子。我们曾对含氮杂环化合物对铁在弱碱性地下水中的缓蚀作用进行过研究,提出了 1 Introduction Organic corrosion inhibitor molecules generally contain lone-pair heteroatoms - non-carbon, non-hydrogen third class atoms. These heteroatoms act as electron donors, giving the corrosion inhibitor a Lewis base, which has a basic effect on the medium and often enhances the corrosion inhibition. More importantly, their presence provides the possibility of forming surface complexes or chelates. It is generally believed that the formation of surface complexes or chelates is an important cause of corrosion inhibition. Nitrogen atoms are the most common heteroatoms in organic corrosion inhibitors. We have conducted a study of the corrosion inhibition effect of nitrogenous heterocyclic compounds on iron in weak alkaline groundwater