Methodology for three-dimensional morphological and quantitative determination of micro and nanocavities produced by chemical and microbiological corrosion in metallic materials

摘要

The present invention refers to a procedure which includes the following objectives:a) To determine the morphology of the micro and nanocavities produced by chemical and/or microbiological corrosion in metallic materials, in the space of three dimensions as well as the effective advance of corrosion, the true length of corrosion cavities and their associated parameters: corrosion vectors, corrosion intensity and determination of the cavities diameter/true length of corrosion ratio, applying scanning electron microscopy (MEB) techniques, and analytic, gravimetric and volumetric formulations;b) To quantitatively determine the rate of chemical and/or microbiological corrosion in metallic materials, through their volumetric and gravimetric properties; andc) To obtain a graphic interface to access the numeric information and the micrographs in a simple and friendly manner.;More specifically, the present invention is related to the laboratory procedures, analytic expressions, devices, procedures and calculations required to characterize the micro and nanocavities of coupons and biocoupons, caused by chemical and/or microbiological pitting and uniform corrosion.