 The electrochemical behavior of AL-0.5-CoCR-FAN-ICU-0.25 and AL-0.5-CoCR-FAN-ICU-0.25-AG0.1-HEA's was investigated in a 0.5-mH2SO4 solution. It was found that CU segregates along the grain boundaries of both alloys, resulting in poor corrosion resistance. However, introducing AG into AL-0.5-CoCR-FAN-ICU-0.25-HEA leads to the formation of a copper-silver eutectic structure, which selectively dissolves the CU regions in the solution. This alloy exhibits better corrosion resistance than AL-0.5-CoCR-FAN-ICU-0.25-HEA without AG, with a corrosion current density of ICAR equals 3.52-0.02-A-CM2. This article was authored by Olga Samolova, Svetlana Pratskova, Natalia Shabarova, and others. We are article.tv, links in the description below.