MUMBAI, India, Oct. 26 -- Intellectual Property India has published a patent application (202617091649 A) filed by Jfe Steel Corporation on July 28, 2026, for Surface-Treated Steel Sheet.
Inventors include Kawamura Yuto; Ueno Takashi; 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 is excellent in terms of all of film anticorrosion, coating anticorrosion, 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. The chromium-containing layer has granular protrusions on the outermost surface thereof. A centroid distribution of the granular protrusions, when subjected to Voronoi tessellation, gives Voronoi polygons which have an average area of from 10.00 nm2 to 1,000.00 nm2 inclusive. The chromium-containing layer has an atomic proportion of C to Cr of 0.2% to 50.0%.
Disclaimer: Curated by HT Syndication.
