## 1 Introduction  
Corrosion is the process of material degradation due to reaction with the environment in which it is located [1]. Corrosion is an unwanted spontaneous process of loss of important properties of metals during their physical interaction with the environment. Destruction of metal products associated with the loss of metal mass causes great damage to the industry [2]. Corrosion has always been a key problem in the oil and gas industry, and researchers are working to solve this problem; reducing and preventing its effects can prevent economic losses [3]. Hydrochloric acid is used to clean oil wells, in the chemical industry to obtain chloride salts and organic products, to synthesize synthetic rubber and dyes, and to saponify fats and oils. In many areas of industry, there is a problem of developing reliable methods of protecting equipment and steel products from destruction by hydrochloric acid solution, which is an aggressive environment [4; 5; 6; 7]. The study of the process of corrosion destruction of steel by hydrochloric acid using the gravimetric method shows the dependence of the loss of sample mass on the concentration of the acid solution [8]. In addition, the rate of destruction of steel samples depends on temperature [9]. This confirms the general rule about the dependence of the rate of chemical reaction on temperature, since with increasing temperature the rate of diffusion and the rate of dissolution of oxide films located on the surface of the samples increase [10; 11; 12]. Corrosion inhibitors are divided into two categories according to chemical composition: inorganic and organic [13; 14], but they have many disadvantages, such as toxicity, short-term stability, and rapid decomposition [15; 16]. Traditional corrosion inhibitors, which are highly toxic, cause irreparable damage to the environment at various stages, from the production process of these materials to transportation and application. The use of environmentally friendly corrosion inhibitors based on plant raw materials is due to a number of factors, including a renewable source of the inhibitor, as well as a structure of substances that is environmentally acceptable for nature and humans [2; 17]. At the same time, plant extracts and fruit wastes have attracted much attention because they contain many active compounds and can prevent [18; 19; 20; 21]. The inhibition efficiency of the compound increases with the number of heteroatoms and benzene rings [22]. Also, the chemisorption of an organic compound increases with the increase of electron density on the heteroatom. The mechanism of action and the inhibitory function of the extracts directly depend on the active phytochemical compounds present in the plant [23]. In general, the mechanism of corrosion inhibitor adsorption is carried out in three ways: chemical adsorption, physical adsorption, and a combination of these adsorptions [24]. The following is a literature review on the use of banana peel and rice straw extracts as green corrosion inhibitors. [PERSON] et al. (2015) reported the inhibition efficiency of banana peel extract in one molar HCl solution on mild steel samples by conducting various experiments [25]. The authors noted that the main compound inhibiting the corrosion process was gallocatechin. They observed a maximum inhibition efficiency of 92% for mild steel using a weight loss test. The authors, studying the effect of immersion time, concluded that the inhibition efficiency of banana peel extract was a function of test duration. [PERSON] et al. (2025) analyzed the inhibition efficiency of banana peel extract as green corrosion inhibitors for carbon steel [26]. The authors reported an inhibition efficiency of 77.9% using the weight loss method. The protective film on the metal surface was confirmed by morphological analysis of the treated samples with banana peel extract. The authors noted that the use of this green inhibitor can help in safe and clean production in various industries, including petroleum. [PERSON] et al.