MUMBAI, India, Oct. 26 -- Intellectual Property India has published a patent application (202617091559 A) filed by Jfe Steel Corporation on July 28, 2026, for Surface-Treated Steel Sheet And Method For Producing Same.
Inventors include Kawamura Yuto; Ueno Takashi; Yamada Yasunori; and Tomozawa Masanari.
The application for the patent was published on October 23, 2026, under issue no. 43/2026.
Abstract: Provided is a surface-treated steel sheet which can be produced without using hexavalent chromium and has excellent film corrosion resistance, coating corrosion resistance, and weldability. Specifically provided is a surface-treated steel sheet which comprises a steel sheet and a chromium-containing layer that is disposed on at least one surface of the steel sheet, wherein: with respect to the roughness curve thereof obtained by a specific method, the arithmetic mean roughness is not less than 0.20 nm but less than 1.30 nm; 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.
