The article presents the results of corrosion tests of multi-groove pads made with the MIG method on a C45E steel substrate. The process of welding the multi-groove pads was carried out with constant parameters of the pad-welding process (i.e. current intensity, arc voltage, pad-welding speed). The results of previous tests allowed determine the optimal process parameters at which we obtain the smallest share of the base material in the padding. The pad-welding process was carried out at a current of 60 A and a wire feed speed of 2.5 mm / min. With these parameters the value of the share of the base material in the slab is the smallest and amounts to 1.7 [-]. The samples were subjected to corrosion tests in two environments (3.5 % sodium chloride solution and 0.001 sulfuric acid solution). The assessment of corrosive properties was made on the basis of constant current measurements (potentio-dynamic method). On the basis of the research, the influence of the corrosive environment on the properties of corrosion properties of paddings was demonstrated.Keywords: corrosion, sea water, optimization, hardfacing
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