MUMBAI, India, Nov. 2 -- Intellectual Property India has published a patent application (202617092980 A) filed by Nippon Steel Corporation on July 31, 2026, for Grain-Oriented Electrical Steel Sheet And Method For Forming Insulating Coating Film.
Inventors include Takeda Kazutoshi; Kataoka Takashi; Yamagata Ryutaro; and Takatani Shinsuke.
The application for the patent was published on October 30, 2026, under issue no. 44/2026.
Abstract: This grain-oriented electrical steel sheet comprises a base material steel sheet and an insulating coating film that is formed on the surface of the base material steel sheet and contains a metal phosphate. The insulating coating film contains aggregates of silica microparticles. When the electrical steel sheet is boiled in boiling pure water for 10 minutes, the amount of phosphoric acid that has eluted into the pure water is measured, and the measured amount of phosphoric acid is divided by the area of the boiled insulating coating film, the resulting elution amount of phosphoric acid from the electrical steel sheet is less than 40 mg/m2.
Disclaimer: Curated by HT Syndication.
