## 1 Introduction
These limitations accentuate the exigency for advanced corrosion protection methodologies endowed with innovative delivery mechanisms, which are capable of obviating equipment dependency, guaranteeing uniform distribution, and furnishing prolonged protection, thereby augmenting both practicality and economic viability. Environmental and operational considerations present supplementary impediments for conventional inhibitors. A multitude of inhibitors pose environmental hazards, such as toxicity to aquatic ecosystems or potential bioaccumulation, thereby mandating stringent handling and disposal protocols that augment operational complexity [10]. Additionally, inhibitors customarily necessitate specific conditions, such as narrow temperature or pH ranges, to attain optimal functionality. For instance, inhibitors efficacious in acidic milieus may prove ineffective in neutral or alkaline conditions [11]. These limitations underscore the desideratum for environmentally benign and versatile alternatives that ensure long-term and reliable protection. In response to the limitations of traditional inhibitors, solid or smart inhibitors have emerged as innovative alternatives. Solid inhibitors are meticulously engineered to encapsulate active corrosion-inhibiting agents within carrier materials, such as hydrogels,polymeric matrices, or microcapsules, to ensure controlled and sustained release. This strategy mitigates the premature exposure of inhibitors to external conditions, consequently enhancing their stability and protracting their protective tenure in aggressive environments [12]. Moreover, the encapsulation technique facilitates a gradual release, which has been demonstrated to uphold efficacious concentration levels over extended durations, rendering them particularly apt for applications in high-pressure and high-temperature scenarios [13]. Smart inhibitors, such as those made of hydrogel or gel-like matrices, incorporate advanced functionalities, namely pH sensitivity, temperature responsiveness, and self-healing capabilities. These systems are capable of releasing inhibitors in a controlled manner contingent upon environmental triggers, offering bespoke protection for downhole tubing under fluctuating conditions. Recent studies, such as those conducted by [14; 15], have evinced the efficacy of pH-sensitive hydrogels in dynamically modulating inhibitor release rates in acidic environments. Furthermore, ref. [16] accentuated temperature-responsive materials that optimize inhibitor performance under fluctuating thermal conditions, while the authors of [17] explored self-healing hydrogels capable of significantly elongating protection durations. Despite their potential, extant solid inhibitors encounter challenges, including low loading capacities (typically below 20%), circumscribed release duration (frequently less than 48 h), and nebulous release mechanisms. For example, the authors of [18] demonstrated that traditional solid inhibitors often fail to sustain release beyond 48 h in high-pressure CO\({}_{2}\) environments, thereby circumscribing their application. Similarly, the authors of [19] highlighted the difficulties in optimizing release kinetics, which are of pivotal importance for long-term protection in varying corrosive conditions. These lacunae necessitate further research to develop inhibitors with enhanced loading capacities, protracted release times, and robust corrosion protection performance. This paper focuses on the synthesis and assessment of a high-loaded solid corrosion inhibitor, namely GE-EP@OIMs, which is devised with the intention of surmounting the constraints inherent in conventional inhibitors. This research endeavor is directed towards the development of a novel solid inhibitor characterized by a substantially elevated loading capacity (exceeding 30%) and an extended release period (up to 30 days).