International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

The influence of corrosion action of Mediterranean, Black and Aegean sea waters on 1.4541 stainless steel structure and magnetic properties is studied. Samples of investigated stainless steel was exposed by marine corrosion action at 25ºC. Crystal structure before and after corrosive action of all sea waters types was characterized by X-ray diffraction (XRD) in CuKα-radiation at room temperature. Temperature dependences of the specific magnetization were studied by the ponderomotive method in the temperature range of 77 – 1100 K in the magnetic field of 0.86 Tesla. It revealed, that crystal structure and specific magnetic characteristics of 1.4541 alloy are resistant to corrosion action of Mediterranean, Black and Aegean sea waters.

An urgent task for the electrical industry is to develop new soft magnetic materials, in particular composites. The greatest interest present composites in which filling components have metal-dielectric-metal (MDM) interaction. Recent few years many research centres are carry out intensive developments of soft magnetic composites (SMC) based on use of soft magnetic particles, usually based on iron, with an electrically insulating coating on each particle. The carried out preliminary researches of a composite magnetic material based on iron ASC 100.29 and Atomet 1001HP powders, surface of which is capsulated by ferrite, have shown perspectives of their application in engineering. Unique specific parameters of a softmagnetic composite material – a magnetic induction of saturation 2.1 Tesla, work in a frequency range up to 100 kHz at Curie temperature from above 800°C allow to use it in high speed valve and valve-jet electromachines and as chokes and high-frequency transformers.

We have studied electromagnetic and corrosive properties of new soft-magnetic composite materials made from iron powder ASC 100.29 and Atomet 1001HP, surface of which is encapsulated by insulating anticorrosive oxide coating. The results demonstrate that the use of such materials in power supplies, chokes, transformers, stators and rotors of electrical machines and other devices ensures their stable operation under various conditions.