Fabrication of (Mn_xCo_1-x)₃O₄ Coated Stainless Steel AISI 430 by Electrodeposition with AC+DC Signals

Abstract

A ferritic stainless steel (FSS) AISI 430 coated by (MnxCo1-x)3O4 spinel has been intensively studied for its potential in application as an interconnect of a solid oxide fuel cell (SOFC). In this study, in order to develop fabrication of (MnxCo1-x)3O4 coatings, Mn-Co coatings on AISI 430 by an electrodeposition technique was adopted. The electric direct current (DC) and alternative current (AC) modulated DC (AC+DC) signals were utilized to drive voltage levels for electrodeposition. By varying the duty of the AC+DC signals from 25 % to 50 %, the ratio of Mn and Co composition in the coating changed, consequently by this technique it is possible to adjust the composition of binary alloy coating. The fabricated coatings also exhibited different morphologies indicating nucleation and grain growth process of various oxide scales of Mn-Co. The oxidation behavior is also investigated to evaluate the quality of the coatings.

A study of the corrosion of stainless steel 304L coated with a 190 nm-thick manganese layer and annealed with nitrogen flux in a 0.4-mole solution of H2SO4 at different temperatures

“…Münz et al [26] reported an improvement in the anti-corrosion properties of Zn/Mn multilayer coatings and resulted that the formation of Zn-Mn and γ-Mn 2 O 3 components suppressed oxygen reduction at the cathode, slowing the corrosion process. In another work by Wiman et al [27], the effect of the current types (AC, DC, or AC + DC) on the phase structure, surface morphology, and anti-corrosion properties of electrodeposited Mn-Co coatings on AISI 430 was investigated. Their results indicated that the (Mn x Co 1−x ) 3 O 4 coating exhibited the protective effect against oxidation of the steel.…”

“…Journal of Theoretical and Applied Physics (2020) 14:[21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] …”