In the present study, a complete evaluation was performed to assess the effect of blasting steel with various grit materials during surface preparation on the surface characteristics and corrosion protection behavior of FBE coatings. Blasting was executed with different constituents such as steel, sand, granite and glass beads to pretreat the hot-rolled steel, and the subsequent surface microstructure, interfacial adhesion bonding and surface protective performance against corrosion were analyzed using different techniques. Surface characterization studies revealed that the different blasting materials highly influenced surface roughness, and the highest roughness of about 40 µm was gained using sandblasting. Adhesion test results for the coatings with steel blasted specimens confirmed the improved adhesion strength by showing the highest adhesion strength of 44% compared to the coating on untreated specimens. Corrosion test results corroborated that scratched FBE coatings with blasted specimens exhibited the highest corrosion protection performance compared to that of FBE coatings with the bare surface by displaying higher impedance values (4.44 × 105 Ω cm2), a nobler shift in corrosion potential (− 0.4134 V versus SCE) and lowest corrosion current density (1.97 × 10−8 A/cm2) after immersion of 15 days in NaCl solution.
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© 2023, The Minerals, Metals & Materials Society.
ASJC Scopus subject areas
- General Materials Science
- General Engineering