2381/43856
LV Mora
LV
Mora
S Naik
S
Naik
S Paul
S
Paul
R Dawson
R
Dawson
A Neville
A
Neville
R Barker
R
Barker
Influence of silica nanoparticles on corrosion resistance of sol-gel based coatings on mild steel
University of Leicester
2019
Science & Technology
Technology
Physical Sciences
Materials Science, Coatings & Films
Physics, Applied
Materials Science
Physics
Polysiloxane coatings
Sol-gel
Silica nanoparticles
Nanoparticle surface treatment
Corrosion protection
GALVANIZED STEEL
BARRIER PROPERTIES
HYBRID COATINGS
SILANE COATINGS
ALUMINUM-ALLOY
PROTECTION
FILMS
PERFORMANCE
CERIUM
BEHAVIOR
2019-04-24 14:43:14
Journal contribution
https://figshare.le.ac.uk/articles/journal_contribution/Influence_of_silica_nanoparticles_on_corrosion_resistance_of_sol-gel_based_coatings_on_mild_steel/10237508
For this study, unfunctionalised and functionalised nanoparticles of silica (SiO2) were incorporated into a sol-gel based matrix in an effort to provide more effective corrosion protection on a mild steel substrate. Tests such as atomic force microscopy (AFM) and white light interferometry (WLI) were carried out to characterise coating microstructure and properties. Corrosion protection and coating durability was investigated using different methods which included electrochemical impedance spectroscopy (EIS) and accelerated salt spray testing to simulate a marine environment. Electrochemical test results as well as results after exposure in the neutral salt spray test indicated that the addition of silica nanoparticles led to an improvement in corrosion resistance of the coating matrix. The most effective performance was observed when the nanoparticles were functionalised. Nanoparticle functionalisation helped to avoid agglomeration during incorporation leading to a more uniform nanoparticle distribution within the coating formulation and an improvement of the coating's ability to protect against corrosion.