磁场对纯Cu微生物腐蚀行为的影响

卫晓阳,杨丽景,吕战鹏,郑必长,宋振纶

Influence of Magnetic Field on Corrosion of Pure Cu in Artificial Seawater with Multispecies Aerobic Bacteria

Xiaoyang WEI,Masoumeh MORADI,Lijing YANG,Zhanpeng LV,Bizhang ZHENG,Zhenlun SONG

表1 纯Cu在有/无磁场条件下的溶液中浸泡10 d后表面腐蚀产物的C、O、N和Cu的XPS光谱的拟合参数

Table 1 Fitting parameters of C1s, O1s, N1s and Cu2p XPS spectra and the relative contents of compounds in the outermost corrosion product films on pure copper after immersion for 10 d under the magnetic fields of 0, 28 and 60 mT

Valence state Sample surface Binding energy / eV Proposed components Atomicfraction / % O 1s Bacteria 531.3 Cu2O 17.86 530.2 Cu2O Bacteria+28 mT 529.1 CuO 19.73 530.5 Cu2O Bacteria+60 mT 532.0 C=O 25.79 533.2 C-O C 1s Bacteria 283.9 C=C 73.88 285.4 C=N 287.7 C=O/CO2 Bacteria+28 mT 282.2 C-O 66.05 283.7 C=C 285.6 C-N Bacteria+60 mT 285.0 C-C 60.04 285.8 C=N N 1s Bacteria 399.1 =N- 3.11 400.3 C-NH2 Bacteria+28 mT 398.0 =N- 4.95 399.2 C-N-C Bacteria+60 mT 400.1 C-NH2 5.18 401.3 N=Cu Cu 2p Bacteria 933.1 Cu2O 3.01 934.9 CuO 942.4 CuO 953.7 Cu2O 962.1 Cu2+ Bacteria+28 mT 931.9 Cu/Cu2O 5.02 933.8 CuO 941.8 CuO 953.2 Cu2O 961.6 Cu2O Bacteria+60 mT 935.1 CuO 5.47 942.2 CuO 944.3 CuO 955.5 Cu2+ 963.2 Cu2O