US 11,925,922 B2
Metal material having improved corrosion resistance and method of improving corrosion resistance of metal material surface using oxygen reduction catalyst
Yong-Tae Kim, Pohang-si (KR); Jaeik Kwak, Pohang-si (KR); Hyoung Seop Kim, Pohang-si (KR); Sujung Son, Pohang-si (KR); and Sang-Mun Jung, Pohang-si (KR)
Assigned to POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION, Pohang-si (KR)
Filed by POSTECH Research and Business Development Foundation, Pohang-si (KR)
Filed on Mar. 7, 2022, as Appl. No. 17/687,919.
Claims priority of application No. 10-2021-0102345 (KR), filed on Aug. 4, 2021.
Prior Publication US 2023/0044742 A1, Feb. 9, 2023
Int. Cl. B01J 23/89 (2006.01); B01J 35/00 (2006.01); B01J 37/02 (2006.01); C25D 11/26 (2006.01)
CPC B01J 23/8906 (2013.01) [B01J 35/19 (2024.01); B01J 35/31 (2024.01); B01J 37/0215 (2013.01); C25D 11/26 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of improving a corrosion resistance of a metal substrate surface using an oxygen reduction catalyst, the method comprising an oxygen reduction catalyst coating step of coating the metal substrate surface with the oxygen reduction catalyst,
wherein the metal substrate surface is an alloy comprising at least one selected from the group consisting of chromium (Cr), stainless steel, high-entropy alloy and aluminum (Al),
wherein the oxygen reduction catalyst coating step comprises forming a coating layer by sputtering a noble metal, selected as the oxygen reduction catalyst, on the metal substrate surface under an argon atmosphere, and
wherein the coating layer has a thickness of 0.8 nm or more.