Structural Properties of Zn-Fe Alloy Coatings and Their Corrosion Resistance
Source abstract
Abstract
Single-layer and multilayer alloy deposits were coated onto a mild steel substrate by a single-bath electroplating process. The developed coating consists of Zn and Fe alloys having different compositions with different layers. The anticorrosion behavior of single-layer and multilayer deposits was evaluated by the potentiodynamic polarization method. The surface morphology of the deposits was studied with a scanning electron microscope. The crystal structure of the deposits was analyzed with the X-ray diffraction technique. The Fe content in the deposit was analyzed by a colorimeter and verified with energy-dispersive X-ray spectroscopy. The micro-hardness tester with a Vickers indenter was used to evaluate the microhardness of the developed single-layer and multilayer coatings. It was found that the microhardness increased with applied current densities. The Zn-Fe multilayer coatings with 300 layers deposited with square and triangular pulses at the applied current density of 2.0/3.0 A dm−2 were five and four times more corrosion-resistant, respectively, than the single-layer coating of the same thickness. The development of Zn-Fe coatings that are resistant to corrosion is particularly important for the automotive industry and steel-based vehicle parts.
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Research context
OpenAlex topics: Electrodeposition and Electroless Coatings · Corrosion Behavior and Inhibition · Metal and Thin Film Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry, NMAM Institute of Technology, NITTE (Deemed to be University), Nitte 574110, India
Department of Physics, NMAM Institute of Technology, NITTE (Deemed to be University), Nitte 574110, India
Nonlinear Optics Research Laboratory, Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, India
Electrochemistry Laboratory, Department of Chemistry, National Institute of Technology Karnataka, Srinivasnagar, Surathkal 575025, India
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