This paper reports on a modified Diamond-Jet-high velocity oxy-fuel (HVOF) spray gun, which makes it possible to produce layers of stainless steel and nickel alloys with very low levels of oxide and porosity. The corrosion behavior of these layers is investigated in a seawater solution. Accelerated investigation methods on an electrochemical basis are used, with the help of which the layers produced with the modified HVOF spray gun are compared with those of a conventional spray gun. In addition, cross-sectional examinations of the layers are carried out before and after the corrosion test in order to prove a possible corrosion attack on the layer or the underlying substrate. Paper includes a German-language abstract.