ThyssenKrupp has patented a steel component featuring a steel substrate with a manganese-containing anticorrosion coating. This coating includes a topmost alloy layer with over 40 wt% manganese, iron, and minimal additional alloy elements, designed to enhance corrosion resistance by having a more negative electrochemical potential than the substrate. GlobalData’s report on ThyssenKrupp 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 ThyssenKrupp, Hydrogen fuel cells was a key innovation area identified from patents. ThyssenKrupp's grant share as of June 2024 was 61%. Grant share is based on the ratio of number of grants to total number of patents.
Manganese-containing anticorrosion coating for steel components
The granted patent US12043902B2 outlines a steel component featuring a steel substrate with an anticorrosion coating applied to at least one side. This coating includes a manganese-containing alloy layer, which serves as the topmost layer in the anticorrosion system. The manganese-containing alloy layer is characterized by containing over 40 wt % manganese, along with aluminum and a selection of other alloy elements such as magnesium, calcium, and zinc, cumulatively accounting for less than 2 wt %. The balance of the alloy consists of iron, which is limited to less than 24 wt % along with unavoidable impurities. Notably, the electrochemical potential of the manganese-containing alloy layer is designed to be more negative than that of the steel substrate, enhancing its protective properties.
Further claims specify the electrochemical potential differences between the steel substrate and the manganese-containing alloy layer, with thresholds set at greater than 50 mV, 150 mV, and 200 mV. Additionally, the patent details that the manganese content in the alloy layer can exceed 45.2 wt %, with a specific mention of levels surpassing 50.2 wt %. The patent also includes claims for a flat steel product intended for hot forming, which similarly features a manganese-containing alloy layer with the same compositional requirements as the steel component. This innovation aims to improve the corrosion resistance of steel products, potentially extending their lifespan and performance in various applications.
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