Pittings morphologies.

There is no pittings on surfaces of alloys before experiment (a). After 24 hours’ endothelial attachment test at static (b) and dynamic (c) conditions, attached endothelial cells, corrosion product and left coatings were removed. Then the surfaces of alloys were observed under SEM and various sizes of pittings were found on alloys surfaces. Scale bar = 500μm and 50μm.