1. Beijing Guohua Technology Group Co., LTD. Beijing China
2. Materials & Structural Engineering Department Nanjing Hydraulic Research Institute Nanjing China
3. Department of Materials Science and Engineering China University of Mining & Technology (Beijing) Beijing China
4. Department of Materials Science and Engineering Beijing Key Laboratory of Failure Corrosion and Protection of Oil/gas Facilities China University of Petroleum (Beijing) Beijing P.R. China