Abstract
Steel is an essential part of our life as it is used in wide applications as food equipment and heavy construction. The polymeric coating prevents the deterioration of the properties of metals due to rust and corrosion. This study investigated a reinforced polymeric coating to steel for enhancing barrier and mechanical properties. A comparison between different configurations of double-layered polymeric coatings was attained. The results showed that a maximum enhancement of 16.7%, 18.9%, 32.6%, 8.5%, and 5.7% in tensile strength, tensile strain, toughness, flexural strength, and flexural strain, respectively were achieved with a coating of epoxy filled with 1wt% Al2O3 microparticles before 1wt% Al2O3 nanoparticles on both sides as compared with pure epoxy coating. Adding micro/nanoparticles to epoxy coating enhanced the barrier properties of the coated steel against salt solution and citric acid environment as compared to pure epoxy coated steel.
Highlights
Steel as a type of metal has become an essential part of our life as it is used in wide applications like automotive, household appliances, food equipment
The mild steel material was used for food equipment manufacturing purposes because it has good mechanical properties like its strength, ductility, and weldability[1, 2, 3]
The mechanical and barrier properties of steel coated with epoxy filled with alumina particles in micron and nanosized were investigated
Summary
Steel as a type of metal has become an essential part of our life as it is used in wide applications like automotive, household appliances, food equipment. Behzadnasab et al.[23] reported that the simultaneous adding of layered nanoclay and small amounts of APS-treated zirconia nanoparticles to epoxy coatings considerably improves the corrosion resistance of the nanocomposite coatings. Alumina nanoparticles are more expensive, nanocomposite coatings were used with a low percentage (1wt%) for their high mechanical and barrier properties. Combining both nanoparticles and microparticles embedded in an epoxy matrix to get benefit from both reinforcements. The mechanical and barrier performance of micro/nanocomposite double-layers coated steel with different configurations was evaluated. Mechanical and barrier resistance properties were conducted on the nano/microparticles coated specimens and compared with pure epoxy coated steel
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