As consumer trends shift towards more natural and ecological consumption patterns, industrialists are actively working towards substituting synthetic chemicals with natural and vegan products that contain bioactive properties. Thus, considering the shifts in customer demand and the growing concern around vegetable sourced productions, this work aims to contribute to the valorization of aromatic and medicinal Moroccan plants. By focusing on the Marrubium vulgare L. species, our objective is to carry out a physicochemical characterization to determine its chemical composition and biological activities. The volatile fraction collected by hydrodistillation (0.61%) and analyzed by GC-MS (gas chromatography coupled to mass spectrometry) contains five main compounds: 3-Thujanone, Eugenol, Topanol, Menthone and Piperitone. The antioxidant activity has been estimated by applying the DPPH (1,1-diphenyl-2-picrylhydrazyl) free radical scavenging test and the ferric reducing antioxidant power (FRAP). The values of inhibitory concentration prove that our oil is a good antioxidant, with values of IC₅₀ = 1.136 mg/mL and IC₅₀ = 2.998 mg/mL, respectively, for the DPPH and FRAP tests. The results of the antifungal activity indicate a significant inhibition of mycelial growth for both tested molds, as well as a total inhibition of spore production at a concentration of 0.25 µL/mL.

Metal corrosion poses a significant threat to environmental integrity and human safety, necessitating the exploration of alternatives to conventional corrosion inhibitors known for their adverse environmental and health impacts. In response to this imperative, natural plant extracts have emerged as promising candidates for eco-friendly corrosion inhibition. With their rich phytochemical composition and inherent affinity for metal surfaces, these extracts demonstrate considerable efficacy in preventing corrosion. Moreover, their potential incorporation into coating formulations offers enhanced protection against corrosion. This chapter aims to provide a comprehensive analysis of the utilization of plant extracts as corrosion inhibitors, while also addressing the practical challenges hindering their widespread commercial adoption. By advocating for the integration of natural solutions and adherence to the principles of green chemistry, we aspire to develop corrosion control methodologies that align with ecological sustainability and human well-being.

This study investigates the antioxidant and anticorrosive properties of Mentha pulegium L. essential oil (MP EO) as a sustainable and eco-friendly alternative to synthetic oxidation inhibitors. The antioxidant activity of MP EO was evaluated using the ferric reducing antioxidant power (FRAP) assay, which demonstrated a strong electron-donating capacity and effective reduction of ferric ions, indicating promising antioxidant potential. The anticorrosive performance was assessed on mild steel in 0.5 M H₂SO₄ using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results showed inhibition efficiencies of up to 75.8% at a concentration of 2 g/L. Molecular docking simulations revealed favorable binding interactions between the key oil components (pulegone and menthone) and the ROS-generating enzyme model (PDB ID: 2CDU), providing complementary mechanistic insight into their potential role in oxidative stress modulation. Additionally, quantum chemical calculations highlighted electronic properties favoring adsorption on metallic surfaces. Surface morphology analysis using SEM/EDX confirmed the formation of a protective film on steel in the presence of MP EO. These combined findings position Mentha pulegium essential oil as a potent, biodegradable candidate for both antioxidant applications and corrosion prevention in acidic environments.

The term “corrosion” refers to the degradation of metallic materials (metals and their alloys) caused by a reaction with environmental factors. This phenomenon causes serious financial and health problems. Corrosion is one of the electrochemical phenomena that manifests itself as the formation of clusters on the surface of metals, where one electrode, known as the “anode”, consumes the other, known as the “cathode”, which remains dormant. In reality, these clusters form as soon as the metal surface becomes heterogeneous, forming the anode and cathode domains where the two primary electrochemical reactions (oxidation and reduction) take place. For example, dissolution or passivation of active electrode materials and dissolution, oxidation or passivation of current collectors are the main causes of corrosion in batteries. An in-depth analysis of battery corrosion is necessary due to the rapid development of battery research. We begin with an overview of recent developments in corrosion and electrode protection for different battery types.

Calcium phosphates are inorganic materials. They have good electrochemical properties due to their stability, low cost, and compatibility with biological systems. These features make them suitable for many applications. This chapter looks at their role in corrosion protection and explores opportunities for their use in energy storage.it includes an experimental study that compares the anticorrosive effectiveness of different calcium phosphates on carbon steel in harsh neutral and acidic environments. The results show significant inhibition rates, ranging from 87% to 92.5% in a 3% NaCl solution and exceeding 95% in acidic conditions. SEM/EDX analyses confirmed the formation of protective layers on the carbon steel surface, supporting the effectiveness of these inhibitors. Lastly, it addresses some key challenges of calcium phosphates as electrode materials for energy storage and looks at future opportunities to improve performance.