Bylo O. The influence of magnetostatic fields on autooscillation corrosion of ferromagnetic metals

The thesis submitted in fulfillment of the requirements for the academic degree of Candidat of Science in Physics and Mathematics with specialization in Magnetism, specialization code 01.04.11. Institute of Magnetism NASU and MESU, Kyiv, 2010. The dissertation is devoted to the investigation of the influence of domain structure magnetostatic fields of a ferromagnetic metal on its corrosion in aggressive surrounding. The correlation of domain structure with corrosion process characteristics under the action of magnetic field and without it is demonstrated. Based on the generalized results of gravimetric method, AFM/MFM and theoretical calculations it has been shown that the dependence of the etching steal mass loss on external magnetic field has oscillating character. It has been experimentally proved that the distribution magnetostatic field of ferromagnetic sample leads to substantial changes (up to several hundreds percents) in steal mass loss at the same value of external magnetic field. The data obtained in this work have also a practical importance. The influence of a magnetostatic field distribution on the etching process allows to establish the correlation between domain structure of a metal and etching character and to use it in the development of new processing technologies to increase the corrosion resistance of ferromagnetic metal elements and construction as a result of their demagnetizing.