Author(s)

K. Shiozawa, K. Motobayashi & M. Sonobe

Abstract

Cantilever-type rotating bending fatigue tests were carried out in 3% saline solution by using the round-bar specimen of 0.37wt% carbon steel coated with chromium nitride by physical vapor deposition method. Also the corrosion behavior of coating specimen was determined by electrochemical polarization measurement. Obvious improvement of corrosion fatigue strength was attained by the coating of electrochemically stable thin film on the steel. The degree of improvement depended on the thickness of coating film, because the size and amount of open pores in the coating decreased with increasing the thickness. Mechanism of corrosion pit formation during corrosion fatigue was discussed and the same mechanism applied to electrochemical meas

Keywords