Investigation of corrosion properties of box boring din 20MnCr5 steel bars

In this study, boriding process was carried out on Ø11 mm diameter DIN 20MnCr5 quality steel bars, used in chain elements such as links and rings, fasteners bolts, at 950oC boronizing temperature, times of 2.5 7.5 hours. the formation growth boride layer metallographic structure, coating thickness corrosion properties boronized steels were investigated depending conditions. box process, Ekabor-II powder mixture, with its commercial name, powder. According to optical microstructure results made a result boriding, 371.5 μm bar for hours while it 195.6 ?m that times. Corrosion experiments solutions prepared by adding 3.5% NaCl distilled water. immersion test, lowest rate mdd measured 112 mg/(dm 2 × day) diameter, hour sample, highest 1456.75 untreated Ø11mm sample. potentiodynamic polarization parallel obtained corrosion. values (i cor ) value 209 10 −6 A/cm icor 0.0039 sample borided