Abstract
The corrosion exposure of steels is a common case. The aim of this study is to decrease corrosion rate in soil that is especially critical in submerged steel pipes by nickel electroplating. Nickel electroplating is conducted at two current densities of 1.5 A/dm2 and 4 A/dm2. It is revealed that the hardness values of the steels that are plated at low current density (1.5 A/dm2) are higher than that of the ones that are plated at high current density (4 A/dm2). The soil corrosion tests were carried out with the electroplated specimens at 1.5 A/dm2 to preserve the hardness. Both electroplated and un-plated steel specimens were hold for 624 hours in the soil solution prepared in the laboratory. The soil corrosion behavior of nickel electroplated steels has not been studied in literature. The cell potentials are measured by using Cu-CuSO4 reference electrode. The corrosion rates for the un-plated and plated specimens are calculated 5.7 and 1.4 µm/year, respectively. Electroplating the pipes and measuring pipe to soil potentials in situ applications can be suggested for future research.
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