Abstract
In order to investigate the corrosion fatigue characteristics of the coated structure materials, the rotating bending fatigue tests were conducted for carbon steel specimen with Zn, Al and paint coated layer partially under accelerated corrosive environment cycled of salt water spraying, drying with warm air and holding at room temperature.
This report shows the mechanical and metallurgical properties of the coated specimens with Zn, Al and paint after corrosion fatigue tests.
The results are as follows:
(1) In the thermal sprayed and painted specimens, the fatigue limit under corrosive environment is the same as that of the blasted specimen tested in air.
(2) The specimens partially sprayed with axial and circular direction had the almost same fatigue limit as the sprayed specimens under corrosive environment.
(3) In the macrostructure of the fatigue fracture surface, the crack propagation have been observed on the specimen non-sprayed circular direction. Furthermore, the micrography of the fatigue fracture surface shows mainly dimple and striation-like pattern.
