Electrochemical and DFT studies of laser-alloyed TiB2/TiC/Al coatings on aluminium alloyRavnikar, Dunja (Avtor) Rajamure, Ravi Shanker (Avtor) Trdan, Uroš (Avtor) Dahotre, Narendra B. (Avtor) Grum, Janez (Avtor) laser coating of aluminum alloy EN AW 6082-T651TiC-TiB2pitting corrosionMicrostructural and corrosion characteristic of laser-alloyed TiB2/TiC/Al composite coatings on 6082-T651 aluminium substrate were investigated. Density functional theory was used to study the chemical bonding of TiC and TiB2. The results confirmed a compact TiB2/TiC/Al-coating with low porosity, without any cracks and with good long-term stability against corrosion. Moreover, EIS and CP results confirmed enhanced corrosion resistance of laser-alloyed TiB2/TiC/Al coatings, with lower coating capacitance, increased polarisation resistance and reduced corrosion current density compared to the Al 6082 substrate. Although, all the laser-alloyed coatings experienced pitting attack, the intensity of pitting attack was substantially reduced compared to the substrate material.20182021-05-31 14:16:57Članek v reviji127262UDK: 669.715.018.8(045)ISSN pri članku: 0010-938XDOI: 10.1016/j.corsci.2018.02.028COBISS_ID: 15930395sl