News Coatings Technologies
Review maps silica’s expanding role in smart anticorrosion coatings
A comprehensive review examines recent advances in silica-based nanomaterials for metal anticorrosion coatings, covering synthesis, surface functionalisation and application as barrier fillers, active agent containers and self-healing enablers.
Metal corrosion remains a critical factor limiting the service life and safety of engineering structures. While conventional organic anticorrosive coatings provide physical barrier protection, microcracks, porosity, mechanical damage and photoageing inevitably degrade their performance over time. The incorporation of functional inorganic nanofillers has opened new possibilities for designing intelligent coatings that combine passive barrier protection with active inhibition and self-healing capabilities.
Among the available nanofiller options, silica (SiO₂) micro- and nanostructures are particularly attractive owing to their abundance, chemical stability and highly tuneable morphology and surface chemistry. A new review article now systematically examines recent progress in SiO₂-based materials for metal anticorrosion coatings within a structured “preparation–modification–application” framework.
Event Tip: Anticorrosive Coatings
What principles determine the corrosion of metals and how can protective coatings help to prevent corrosion? In this e-learning tutorial, the basics of electrochemical processes will be explained, and typical ingredients and formulation features of corrosion protection coatings will be presented and discussed.
From synthesis to surface functionalisation
The review first outlines typical synthesis routes for various SiO₂ structure types, including emerging biomass-derived silica relevant to coating formulations. It then discusses surface functionalisation strategies and their effects on dispersion quality, resin–metal interfacial adhesion and environmental stability – factors that are decisive for coating performance in practice.
On the application side, the authors identify three principal roles for silica in anticorrosive coatings: as a barrier filler that densifies polymer networks, creates tortuous diffusion paths and improves wear and ageing resistance; as a container for active agents enabling controlled, stimulus-responsive release of corrosion inhibitors; and as a structural component in both extrinsic and intrinsic self-healing systems.
AI and sustainability shape future directions
The review concludes by addressing key challenges and future directions at the intersection of artificial intelligence-assisted materials design and sustainability objectives. The rational engineering of SiO₂-based intelligent anticorrosion coatings is identified as a promising field, though scalability and consistent nanofiller quality remain hurdles for industrial implementation. The comprehensive scope of the review makes it a valuable reference for formulators and researchers working on next-generation protective coating systems.
Source: Yin, H. et al., Silica-based materials in metal anticorrosion coatings: Progress in design, functionalization and applications. Progress in Organic Coatings 110071 (2026).
