Mass change analysis, high-temperature gases

The experiments used to determine resistance to corrosion at high temperatures will differ depending on the aggressive gas that acts on the metal. There are general behavior patterns which make it possible to evaluate the character of the attack. Thus, the study of the change in the mass with the exposiue time, or the analysis of the transversal cut in the samples studied will reveal the rate of the corrosion process at high temperatiues and determine the profundity of the attack. 

The incorporation of a gas chromatography (GC) stage between pyrolysis (Py) and mass spectrometry (MS) has the obvious advantage of refining the detail that can be achieved in structural analysis and rendering MS identification of pyrolysis prodncts more certain. The application of Py-GC-MS to the identification of complex mixtnres of volatile compounds produced under high temperature conditions has been reviewed by Chang and Tackett [1]. 

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