Analysis of the Initial Corrosion Reaction of Copper in Gaseous Environments by Using IR-RAS

摘要

The method of infrared reflection absorption spectroscopy (IR-RAS) for identification of corrosion products and for determination of their formation rates, which were initially formed on metal in gaseous corrosion environments, was explained by using copper, as an example, in humid air containing sulfur dioxide. Overlapping hands of a series of time-resolved IR spectra were deconvoluted on the basis of the two-dimensional correlation analysis (2 D-IR), and the corrosion products were identified. By simultaneous measurements using IR-RAS and QCM, calibration curves for each component of the corrosion products and physically adsorbed water were made, and the quantitative determination of the corrosion products was achieved from only IR-RAS measurements.