1. School of Chemistry and Chemical Engineering
2. Chongqing University
3. Chongqing 400044, P. R. China
4. State key laboratory for marine corrosion and protection
5. Luoyang ship material research institute
6. Qingdao 266101, P. R. China
7. School of Materials and Chemical Engineering
8. Chongqing University of Arts and Sciences
9. Yongchuan 402160, P. R. China