Papers by Author: Bao Rong Hou

Abstract: nanoZrO₂ was modified by styrene coupling grafting method and then used as an additive to improve the protective performance of epoxy coating. Two kinds of coatings, neat epoxy coating and nanoZrO₂/epoxy coating, were prepared and applied on Q235 carbon steel plates. The plates were submitted to salt spray chamber and seawater immersion for 1000 hours to evaluate the corrosion protection performance for these two kinds of coatings. Tafel polarization curves and electrochemical impedance spectroscopy (EIS) were determined to analyze the corrosion behavior of coating/metal system. Scanning electron microscopy (SEM) and photographs were carried out for morphology analysis of two kinds of coatings under different conditions. Results showed a superior stability and efficient corrosion protection by nanoZrO₂ /epoxy coating. The modified nanoZrO₂ could inhibit the penetration of corrosive media and then improve the corrosion protection of the epoxy coating on carbon steel.

Abstract: The progresses and theoretical methodology of computer modeling of cathodic protection using the boundary element method (BEM) are outlined. To test the effectiveness and accuracy of BEM numerical modeling of cathodic protection for offshore structures, a miniature model offshore jacket with a sacrificial anode was built and put in a test pool full of seawater. Cathodic protection potentials on different positions were measured and compared with the values obtained from computer modeling. The results show good agreement between measured value and numerical simulated value. The factors that led to discrepancy in the two groups of data were discussed.