Effect of neutral salt spray precorrosion on fatigue life of AF1410 steel

The corrosion resistance of AF1410 steel in the neutral salt spray environment was studied using the methods of weight loss and XRD. After different precorrosion time in the neutral salt spray, the fatigue properties of the specimens were tested, and the influences of the different precorrosion time on the fatigue life of the material were investigated. The results showed that serious all-around corrosion happened on the AF1410 steel, and the corrosion products are mainly FeO(OH) and Fe₃O. The corrosion weight loss curve was plotted, and the fatigue fracture morphology was observed. It was shown that with the increasing of the corrosion time, the degree of the corrosion damage increased and more fatigue crack initiations were apt to take shape, which led to the final fatigue rupture. Finally, the fatigue life properties of AF1410 steel after neutral salt spray corrosion were obtained and the influence coefficient C(t) of the pre-corrosion on the fatigue life was plotted.