Cytotoxicity study of a novel implant material modified by microarc oxidation
This study examined the cytotoxicity of a new implant material modified by microarc oxidation technique. Cells on different surfaces of the implant were evaluated 2, 4 and 6 days after treatment. The results showed that cell attachment, cell morphology, and cell proliferation were influenced by the different surface treatments, and a significant increase in the osteoblast cell activity was observed on the porous MAO-Ti coating. Our results suggest that the porous MAO-Ti surface has a better biocompatibility and electrochemical performance than pure titanium surface.
Corrosion and protection of the underwater steel structures for W114A platform were investigated.The offshore platform has been in service in the South China Sea for 15 years.It was found that the bio-fouling was serious and the maximum attachment thickness was 20cm,while,the cathodic protection system was normal and the protective effect was favorable.After analyzing the detective methods and their results,some problems were found.The program of potential detection was inappropriate,the detection method for physical size of the sacrificial anodes was inaccurate,and the base surface of the thickness measurement points was not clean;therefore,the cathodic protective effect could not be accuraely evaluated.To solve these problems,some valuable suggestions are put forward accordingly.