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本文对通式为■的一系列N-酰代氨基酸进行了缓蚀性能的筛选评定,还对它们的化学结构与缓蚀性能之间的关系进行了探讨。这类化合物与铁离子的络合常数可以说明它们的缓蚀性能取决于与金属表面离子所形成的络合物的稳定性。此外,作为疏水基团的烃基的长度和结构也和缓蚀性能密切相关。量子化学CNDO/Ⅱ方法对这类化合物的分子轨道能量和分子中各原子的电子云密度的初步计算,可以说明决定这些化合物的缓蚀能力的,主要是分子的前沿轨道能量。
In this paper, a series of N-acyl amino acids of general formula (I) were screened for their corrosion inhibition performance, and the relationship between their chemical structure and corrosion inhibition properties was also discussed. The complexing constants of these compounds with iron ions suggest that their corrosion inhibition properties depend on the stability of the complexes formed with the metal surface ions. In addition, the length and structure of the hydrocarbyl group as a hydrophobic group are also closely related to the corrosion inhibition performance. Quantum chemistry CNDO / Ⅱ method of molecular orbital energy for these compounds and molecular electron density of atoms in each of the preliminary calculations can show that these compounds determine the inhibition of corrosion ability, mainly the molecular frontier orbital energy.