Comprehensive Insights on Corrosion in Superalloys: Testing, Protection Methods, Influencing Factors, and Mechanisms
Aalia Asghar, Nadia Akram, Khalid Mahmood Zia, Zumaira Siddique, Atta-ul-Haq
Super alloys can be defined as high-performance materials developed for maintaining great mechanical properties and resisting corrosive attack at considerable temperatures, making their application in aerospace, power generation and chemistry industries. Based on the chemical analysis, corrosion characteristic and protective measures of the super alloy are also investigated in this review. There are three subgroups of super alloys known namely as nickel group, cobalt group and iron group with the nickel based super alloys taking the largest percentage due to high heat resisting ability and oxidation resisting ability. The originalities of super alloys arise from their composition which combines chromium, aluminum and titanium, as well as refractory metals like tungsten. These elements assist in the formation of Steady State precipitates like the γ’-precipitates Ni3 (Al, Ti) which are useful in strengthening at high working temperatures as well as resisting creep age. There are different types of corrosion, which affect super alloys operating at high temperatures and stressing conditions such as high temperature oxidation, hot corrosion, hydrogen induced embrittlement and stress corrosion cracking. Kinetics and mechanism of corrosion depend very much on the presence of protective oxide layers such as Cr2O3 and Al2O3. To overcome the problem of corrosion several techniques of surface treatment and coating are used. These, anodizing and plating, thermal barrier coatings (TBCs) and environmental barrier Coatings (EBCs) are some of the most developed future trends in super alloy are directed toward enhancing the staking of alloy constituents, innovative manufacturing processes such as direct metal laser sintering and advanced coating systems. Current investigation is continued to overcome problems in environmental issues, economic factors, and technological issues of super alloys in corrosion protection.
Keywords
Metals, Super Alloys, Corrosion, Factors Affecting Super Alloys, Corrosion Mechanism
Published online 9/10/2025, 22 pages
Citation: Aalia Asghar, Nadia Akram, Khalid Mahmood Zia, Zumaira Siddique, Atta-ul-Haq, Comprehensive Insights on Corrosion in Superalloys: Testing, Protection Methods, Influencing Factors, and Mechanisms, Materials Research Foundations, Vol. 178, pp 109-130, 2025
DOI: https://doi.org/10.21741/9781644903698-7
Part of the book on Superalloys
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