Investigation into Corrosion Fatigue of Unalloyed and Low-alloy Steels.

Six commercial steels - three fine-grain normalized steels, one aged steel, one heat-resistant steel and one aged high-strength steel - were tested in rotary bending test machine equipped with a corrosion test cabinet. The test medium used was 0. 05 m NaCl-solution. The results show that the cycling bending strength of all the steels tested is considerably reduced in this weak corrosion medium. Cathodic polarization gives rise to increased corrosion fatigue strength of high strength steels and reduces corrosion fatigue sensitivity.