Abstract
Hydrogen embrittlement remains a crucial concern in industries that rely on high-strength materials.Exposure to hydrogen poses a significant threat to the me-chanical integrity of such materials.This review article briefly discusses the fundamentals of hydrogen embrittlement,in-cluding its mechanisms and the effects of various factors,such as chemical composition and environmental conditions.Sev-eral heat treatments have been developed to eliminate the risk of hydrogen embrittlement.Among various suggested heat treatments,the retrogression-reaging(RRA)treatment has proven effective in optimizing the balance between mechanical properties and resistance to hydrogen embrittlement.This review highlights the role of RRA treatment in modifying the microstructure of Al-Zn-Mg alloys to enhance their ability to resist hydrogen embrittlement,building on existing literature.An interesting aspect explored in this article is the intricate relationship between pre-deformation and subsequent RRA treatment.Additionally,the review discusses the use of RRA as a post-weld heat treatment to mitigate the susceptibility of weldments to hydrogen embrittlement.A comprehensive ex-ploration of these topics is beneficial for a thorough under-standing of the multifaceted functions of RRA treatment.However,despite its advantages,the widespread adoption of RRA treatment in the industry is hindered by certain chal-lenges.This review addresses these challenges,offering in-sights into the latest strategies to overcome them.