Papers by Author: Fan Gao

Abstract: Alloy 600 was studied in different Na2SO4 solutions with three approaches including Tafel curve method, AC impedance curve and high temperature experiment. Experimental results showed that interface electric transfer process was the control step of whole electrochemistry process; and selective corrosion of Alloy 600 would not happen in high temperature process

Abstract: Abstract: The corrosion resistance of brass H70-1A cooling water was studied through weight-loss method and electrochemistry measurement in different concentration ratio condition. The results obtained from this study showed that brass inhibitor was necessary to add to circulating cooling water system when concentration ratio was in the range of 3~7.

Abstract: Abstract: Alloy 600 was studied in different acidic environments with three approaches including Tafel curve method, linear polarization method and AC impedance curve. Experimental results showed that there was greatest corrosion velocity when pH was 4 for preventing film factor; and it was possibly caused by elements corrosion dissolving with different proportional compared with Alloy 600 metallurgical contents.

Abstract: In order to study the sludge microstructure and dewatering performance, the sludge was treated using different conditioners, the same conditioner in a different dosage, the same formula in a different proportion and different order of adding conditioners. The microstructure of dehydrated sludge was observed by scanning electron microscopy. The relationship between the sludge dewatering properties and microstructure characteristics was discussed. It was proven that the different dehydration performance correspond to the different morphology. The better dewatering performance shows more pore at the surface of sludge cake.Contractly, the sludge cake with poor dewatering perform a dense surface, even membranous. Therefore, there is a certain of relationship between the microstructure of sludge cake and its dehydration performance.