Metals at high temperatures (650 - 950 °C) suffer from hot corrosion at the presence of molten salt compounds, which destroy the protective oxide layer on metal surface. Deterioration proceeds usually rapidly and is unpredictable.  In big diesel engines used in boats and power plants heavy fuels contain impurities of vanadium (V), sodium (Na) and sulphur (S), which oxidise during burning process and form salt compounds like Na₂SO₄ and NaVO₃ on walls of burning chamber. Parts of burning chamber like piston crown, cylinder head and liner, exhaust valve and injection nozzles expose to hot corrosion. In this experiment several nickel and chromium based alloys were laser cladded with 6 kW HPDL in order to prolong the lifetime of quenched and tempered steel piston crown and replace the use of more expensive Nimonic superalloys as a crown material. Prepared samples were exposed to salt containing 50 wt.% V₂O₅ and 50 wt.% Na₂SO₄ at 650 °C for 1000 hours. Coatings and reaction products were analysed with SEM, EDS and XRD. High quality laser coatings showed equal or better corrosion resistance than reference wrought alloys Nimonic 80A, Inconel 625 and Inconel 718.