Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5368077 | Applied Surface Science | 2011 | 9 Pages |
A uniform and continuous chromized coating on AISI 1020 steel is produced by low-temperature pack chromization (LTPC) with electrical discharge machining and Ni electroplating pretreatments. The anticorrosive performance of the chromized steels is investigated in a 0.5Â M H2SO4 solution at room temperature. The testing results indicate that the chromized specimen with electrical discharge machining and Ni electroplating pretreatments exhibits the lowest corrosion current density, 2.16Â ÃÂ 10â8Â AÂ cmâ2, among the tested specimens. The corrosion resistance of all tested specimens are in the order of bare 1020Â <Â 1020-Cr(700-2)Â <Â 1020-Ni-Cr(700-2)Â <Â 1020-EDM-Ni-Cr(700-2). Moreover, the 1020-Ni-Cr(700-2) specimen have the best conductivity as a result of the less amount of oxides in the superficial coating.
Research highlightsⶠCharacteristics of the AISI 1020 steel through pack chromization with pretreatments. ⶠThe performance of the chromized coatings in the simulated environments of PEMFCs. ⶠThe chromized coatings contain chromium carbides mostly and some chromium nitrides. ⶠPromoting the corrosion resistance and surface conductivity of AISI 1020 steels.