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| 1 | Corrosion Mechanism of 5083 Aluminum Alloy in Seawater Containing Phosphate显示文摘As a material with good corrosion resistance,5083 aluminum alloy has a great application prospect in marine environment.In this work,the corrosion characteristics of 5083 aluminum alloy in seawater containing phosphate were investigated with Potentiodynamic Polarization,Electrochemical Impedance Spectroscopy (EIS),Scanning Electron Microscope (SEM),Energy Dispersive Spectroscopy Analysis (EDSA),X-ray Photoelectron Spectroscopy (XPS) and Laser Confocal Microscope.The results indicated that the effects of phosphate in seawater were two-fold.Firstly,phosphate slightly accelerated the corrosion of 5083 in seawater in the early stage of corrosion.HPO_4~(2-)competed with OH~-in the adsorption process on the alloy surface,which weakened the contact between OH~-and Al~(3+)near the interface of the alloy,and inhibited the formation as well as the self-repair of the passive film,thus accelerating the activation dissolution process.Compared with the natural seawater,the charge transfer resistance of 5083 in the seawater containing phosphate decreased faster during the early stage of corrosion,and the corrosion current density i_(corr) was higher in seawater containing phosphate.On the other hand,the addition of phosphate would not affect the cluster distribution of the second phase of 5083 in seawater,but it changed the composition of the corrosion product layer and had an obvious inhibitory effect on the local corrosion of 5083 in seawater.After 16-day exposure,shallower and more sparsely distributed pits could be observed on the derusted surface of 5083 in the seawater containing phosphate,and the pitting coefficient in the seawater containing phosphate was significantly lower than that in natural seawater.The reduction of pitting tendency could be realized mainly through two ways.First,the HPO_4~(2-)adsorbed on the surface of the passive film in the early stage of corrosion and repeled the corrosive anions such as Cl~-.Second,phosphate participated in the construction of the Ca HPO_4 precipitation film,which acted as a barrier and protection. | WANG Jiaming YANG Haodong DU Min HOU Jian PENG Wenshan LIN Cunguo | 2021 | Journal of Ocean University of China2021，20，2： | 3 |
| 2 | Natural Antifouling Materials from Marine Plants Ulva Pertusa 显示文摘 | Zheng Jiyong Lin Cunguo Di Lanlan | 2009 | Advaned Materials Research2009，，7982： | 1 |
| 3 | Fluorimetric determination of nucleic acids with terbium and lutetium显示文摘 | Lin Cunguo Zhang Guiling Yang Jinghe | 2002 | Microchemical Journal2002，71，： | 1 |
| 4 | Extraction of Protease Produced by Sea Mud Bacteria and Evaluation of Antifouling Performance显示文摘Enzyme-based antifouling coatings are potential alternative to traditional tributyltin-based coatings in the marine biofouling control depended on its environmental friendliness.Proteases are usually the key antifouling active components in enzyme based antifouling coatings.In this work,based on biological antagonism effect,a marine proteolytic bacterial strain of Bacillus velezensis was isolated from the sea mud,and denoted as SM-1.The scanning electron microscope(SEM)revealed that the bacteria are rod-shaped with length 1-1.3μm.The protease-producing conditions of SM-1 were investigated,and it was found that the culture solution displays higher proteolytic activity under the culture conditions of 35℃,10‰-20‰salinity,pH 6-9 and more than 7 d culture time.Moreover,the 25 kDa protein was confirmed to be the main active component in the crude protease,which was revealed via the experiment of SDS-PAGE.The antifouling assay indicated that the protease SM-1 has remarkable effect on the decomposition of barnacle cement and diatom secretion,and also can effectively inhibit the attachment of barnacle cyprids,diatom and mussel byssus.Therefore,this protease potentially can be used as environmental-friendly antifoulant of enzyme-based marine antifouling coatings,and this work also provides a new approach to obtain antifouling protease via isolating proteolytic bacteria from the sea mud surrounding representative fouling organisms. | WANG Li YU Liangmin LIN Cunguo | 2019 | Journal of Ocean University of China2019，18，5： | 1 |
| 5 | Enhanced fluorescence of the terbium-gadolinium-nucleic acids system and the determination of nucleic acids 显示文摘 | Lin Cunguo Yang Jinghe Wu Xia | 2000 | Anal Chim Acta2000，403，12： | 1 |
| 6 | Study of molybde- num/lanthanum-based composite conversion coatings on AZ31 magnesium alloy 显示文摘 | Lihui Yang Junqing Li Cunguo Lin | 2011 | Applied Surface Science2011，257，： | 1 |
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