1. Shandong Key Laboratory of Oil & Gas Storage and Transportation Safety, College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, People’s Republic of China
2. CNOOC Changzhou coating Chemical Research lnstitute Co., Ltd, Shanghai Haikai anticorrosion engineering technology branch, Changzhou, People’s Republic of China
3. PipeChina West East Gas Pipeline Company, Zhenzhou, People’s Republic of China