(Ni, Pt)Al- and NiCoCrAlYTa-coating were deposited on the second-generation nickel-based single crystal superalloy DD6 by electroplating Pt + chemical vapor aluminizing, and arc ion plating respectively. The hot corrosion resistance of two coatings was assessed beneath a deposited film of salts mixture Na₂SO₄ + 5%NaCl in air at 800 and 900 ℃. The phase constituents and element distribution of the coatings before and after test were characterized by using scanning electron microscopy and X-ray diffraction. The results show that after 300 h of hot corrosion at 800 and 900 ℃, the NiCoCrAlYTa coatings completely failed, with the formation of a mixed oxide scale with poor protective performance on the surface, and a large amount of spalling occurred, with the corrosion penetrating the coating and entering the interior of the substrate. In the contrast, a single Al₂O₃ scale with relatively few spallations was formed on the surface of (Ni, Pt)Al coating, while certain among of NiAl phase was still retained within the coating. In other word, the (Ni, Pt)Al coatings exhibited superior hot corrosion resistance rather than the NiCoCrAlYTa coatings.