Surface roughening treatment of permalloy material 45 using Na2SO4-electrolyzed oxidizing water - The effects of ultrasonic agitation

This paper discusses surface roughening treatment of permalloy material 45 using Na;S04-electrolyzed oxidizing water (hereinafter it is referred to as Na2SO4 EO water) with ultrasonic. Firstly, roughening treatment experiment on polished surface of permalloy material 45, using Na2SO4 EO water and H 2 S O 4 solution with ultrasonic, was carried out. The results showed that when using H2SO4 solution, the surface of the permalloy material 45 couldn't be uniformly roughened, while when using Na2SO4 EO water, it could be uniformly roughened. Secondly, experiment on the relationship between the time elapsed from the creation of Na2SO4 EO water and roughening performance was carried out. The results showed that if the time elapsed from the creation of Na2SO4 EO water was within 1 week, the polished surface which had not been done heat treatment can be uniformly roughened, which the polished surface which had already been done heat treatment couldn't be uniformly roughened. Thirdly, in order to elucidate the mechanism of roughening treatment, experiment on characteristic change of Na2SO4 EO water and its etching action on permalloy material 45 when using ultrasonic was carried out. The results showed when irradiating ultrasonic, the dissolved oxygen concentration of Na2SO4 EO water became higher and the etching action also became stronger. By this Study, we received the suggestion that Na2SO4 EO water could be applied to the surface roughening treatment of permalloy material 45. © 2020 Japan Society for Precision Engineering. All rights reserved.