Optical beam deflection method for the diagnostics of nanosuspension
The theoretical analysis of the light induced mass transport task was executed in the nanosuspension in a homogeneous light field. As a result of the analytical solution of the light induced mass transport task it was obtained an expression for the deflection angle of the beam in a pseudo-prism. The using of high intensities of the reference beam allows significantly increase the efficiency of the beam deflection method. The results are relevant in the study of the dispersed liquid media, as well as optical diagnostics of such materials.
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.