A method for modeling the processes of biocorrosion lesions of thin-walled sealed shells of aluminum-magnesium alloys during operation of spacecraft and a simulation composition for its implementation (options)

摘要

1. A method for simulating the processes of biocorrosion lesions of thin-walled sealed shells of aluminum-magnesium alloys during the operation of spacecraft, characterized in that test and control samples are made of aluminum-magnesium alloys, the prepared test and control samples are dried, the test samples are sterilized, and the simulation composition is prepared on based on an organic acid that is applied to sterilized test samples and at least two samples are placed zets in Petri dishes, cover them, control samples treated with distilled water are also placed in Petri dishes, Petri dishes with test and control samples are placed in different desiccators, on the bottom of which water is poured to maintain moisture more than 90%, the desiccators are closed and kept at at room temperature, the test and control samples are exposed, then the samples are removed from the Petri dishes, washed in running water, characterized in that the test and control samples are used with mechanical surface treated, and to prepare the simulation composition, distilled water and one of the organic acids selected from the following carboxylic acids are used: gluconic or malonic, the resulting composition is sprayed onto test samples of aluminum-magnesium alloys, after washing the samples in running water, they are rinsed distilled water and dried, then using a scanning electron microscope assess the initial stages of biocorrosion and its type, examine the chemical composition of expressions