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2.2. Analysis of Rust Conversion Performance X-ray diffraction (XRD) used a Bruker D8 Advance (Bruker, Karlsruhe, Germany) with the monochromatic Cu Kα radiation, with a scanning rate of 4 ◦/min from 2θ = 10◦ up to 2θ = 80◦. The XRD pattern was analyzed to determine the ...