Teck Resources has been granted a patent for a coated steel strip that provides cathodic protection before and after press hardening or hot forming at high temperatures. The coating includes zinc, aluminum, and manganese or antimony. The patent claims a press hardened steel sheet with a galvanized corrosion-protection layer containing iron, aluminum, manganese, and zinc. GlobalData’s report on Teck Resources gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Teck Resources, Extraction by leaching was a key innovation area identified from patents. Teck Resources's grant share as of March 2024 was 73%. Grant share is based on the ratio of number of grants to total number of patents.
Galvanized steel strip for press hardening with cathodic protection
A recently granted patent (Publication Number: US11913118B2) discloses a press hardened steel sheet article with a galvanized corrosion-protection layer containing iron, aluminum, manganese (Mn), and zinc. The unique feature of this layer is the absence of a zinc-rich G phase, with a minimum of 18 weight percent zinc in the a (Fe, Zn) phase. The patent also includes various claims specifying the zinc content in the corrosion-protection coating, ranging from 19 to 22 weight percent, along with options for the inclusion or exclusion of boron in the steel article.
Furthermore, the patent outlines a method for producing the press hardened steel sheet article, involving steps such as coating the steel alloy with zinc, aluminum, manganese, and zinc, followed by heating, press hardening, and cooling. The method emphasizes the importance of maintaining a specific zinc content in the a (Fe, Zn) phase to ensure effective cathodic protection. Additional steps like avoiding the formation of an Al-rich inhibition layer at the sheet-coating interface, facilitating Fe-Zn diffusion with manganese, and promoting pre-alloying through reheating are also highlighted. The reheating process is detailed with temperature and holding time ranges to achieve optimal results, including the suppression of zinc evaporation and fast diffusion of zinc into the steel alloy during press hardening.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
