MUMBAI, India, Oct. 26 -- Intellectual Property India has published a patent application (202617091657 A) filed by Jfe Steel Corporation on July 28, 2026, for Surface-Treated Steel Sheet.
Inventors include Kawamura Yuto; Ueno Takashi; Tomozawa Masanari; and Kiyokane Naoya.
The application for the patent was published on October 23, 2026, under issue no. 43/2026.
Abstract: Provided is a surface-treated steel sheet that can be produced without using hexavalent chromium and has excellent film corrosion resistance, coating corrosion resistance, and weldability. The surface-treated steel sheet comprises a steel sheet and a chromium-containing layer disposed on at least one surface of the steel sheet, wherein, in a 0th-order persistence diagram created from a distribution image of granular protrusions present on the outermost surface of the chromium-containing layer, the minimum birth size, the maximum death size, and the number of data points having a death size of 0.5?nm to 15?nm inclusive are each within a predetermined range, and the chromium-containing layer has an atomic ratio of C to Cr of 0.2% to 50.0% inclusive.
Disclaimer: Curated by HT Syndication.
