The synthesis and characterisation of derivatives of o-phenylenediamine and assessing their effectiveness in inhibiting corrosion for rust prevention.

Abstract

The corrosion of metals, particularly rust on iron and its alloys, poses significant challenges across industries, with notable economic and environmental consequences. Traditional rust prevention methods, reliant on chemical inhibitors and coatings, often raise concerns regarding their environmental and health impacts. In response, advancements in corrosion science have emphasized the potential of o-phenylenediamine (OPD) derivatives and vaseline-based mixtures as innovative, eco-friendly solutions. This article reviews the efficacy of OPD derivatives in mitigating anodic and cathodic reactions, thereby preventing rust formation by creating robust protective layers on metal surfaces. These derivatives act as physical barriers, impeding corrosive agents and offering versatile applications, including integration into protective coatings for new and existing metal structures. The synergistic combination of OPD with other inhibitors enhances protection, supporting sustainable practices by reducing resource consumption and environmental impact. Vaseline-based layers, while providing satisfactory initial hydrophobicity and ease of application, face challenges such as achieving uniform coverage on polar metal surfaces and preventing pore formation. Integrating Fe(III)(BTA)₃ into vaseline coatings represents a paradigm shift in sustainable corrosion prevention, with a 30% concentration identified as optimal for maximum protection. This development marks a pivotal advancement in materials science, offering robust corrosion protection aligned with sustainability principles. The use of OPD derivatives introduces a novel, environmentally benign approach, leveraging their ability to adsorb onto metal surfaces and create protective layers against moisture and oxygen. This innovation aligns with global initiatives to reduce industrial environmental footprints, promoting sustainable, effective corrosion prevention strategies.