|
|
|
| Cathodic Protection of X65 Carbon Steel in a Simulated Oilfield Produced Water |
| QIU Jing1, DU Min1, LU Yuan2, ZHANG Ying2, GUO Haijun2, LI Chengjie1 |
| 1. Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China; 2. CNOOC-ETS-Oilfield Technology Services Co., Tianjin 300452, China |
|
|
|
|
Abstract The effectiveness of cathodic protection for X65 carbon steel in a simulated oilfield produced water was examined by means of measurements of polarization curve, constant potential cathodic polarization and weight loss. Then the morphology, composition and constituent of the corrosion products were characterized by SEM, EDS and XRD. The result indicates: in the simulated oilfield produced water, X65 carbon steel suffered from serious pitting corrosion with a great weight loss rate; the cathodic protection potential in a range -800 mV to -1000 mV exhibits obvious inhibition effect on corrosion of X65 in the environment; a sound scale of calcareous deposits can't formed on the surface of carbon steel by the potential of -800 mV, a dense and good adhesive scale of deposits may formed by -900 mV on the steel surface, resulting effectively in reduction of the cathodic protection current density. The deposits blister and easily spall off due to hydrogen evolution by potential -1000 mV. In comparison with the circumstance in seawater, hydrogen evolution potential of X65 carbon steel is much positive in the simulated oilfield produced water and the deposits do not contain magnesium hydroxide.
|
|
Received: 26 August 2013
|
|
|
[1] Qu H, Ma Z H, Guan S F, et al. Corrosion and protection of dissolved gases in produced water from oil field [J]. Environ. Sci. Technol., 2011, 24(2): 65-69 (曲虎, 马梓涵, 管善峰等. 油田采出水中溶解性气体的腐蚀与防护 [J]. 环境科学, 2011, 24(2): 65-69)
[2] Yin Z F, Liu L, Zhang Y Q, et al. Characteristics and mechanism of?corrosion?film formation on antisulphur steels in CO 2 /H 2 S environments [J]. Corros. Eng. Sci. Technol., 2012, 47(2): 138-144
[3] Ren C Q, Wang X, Liu L, et al. Lab and field investigations on localized?corrosion?of casing [J]. Mater. Corros., 2012, 63(2): 168-172
[4] Zhang X J, Ji W, Wang B H, et al. Study on the treatment technology of oilfield produced water [J]. Ind. Safety Environ. Prot., 2007, 33(4): 13-16 (张学佳, 纪巍, 王宝辉等. 油田采出水处理技术进展 [J]. 工业安全与环保, 2007, 33(4): 13-16)
[5] Cheng L H, Bi X J, Ni Y T. Oilfield?produced water treatment by ozone-enhanced flocculation [J]. Energy Educ. Sci. Technol., 2012,
[6] Wei D, Wang H Y, Zhu S D, et al. Corrosion behavior of low-nickel alloy steels in a simulated oilfield environment containing carbon dioxide [J]. Proc. Inst. Mech. Eng. B-J. Eng. Ma., 2012, 266(A11): 1891-1899
[7] Han J. Research of the treatment technology of oilfield produced water [J]. China Chem. Trade, 2012, (4): 278 (韩剑. 油田采出水处理技术方法研究 [J]. 中国化工贸易, 2012, (4): 278)
[8] Horsup D I, Clark J C, Binks B P, et al. The fate of?oilfield?corrosion?inhibitors in multiphase systems [J]. Corrosion, 2010, 66(3): 036001
[9] Mohammed K Z, Hamdy A, Abdel-Wahab A, et al. Temperature effect on?corrosion?inhibition of carbon steel in formation water by non-ionic inhibitor and synergistic influence of halide ions [J]. Life Sci. J., 2012, 9(2): 424-434
[10] Alikin I N, Malkov Y K, Khan S V. Corrosion Inhibitor in Mineralised Hydrogen Sulphide-containing Oilfield Media [P]. Russia: RU2454488-C1, 2012
[11] Hartt W H. 2012 Frank Newman Speller Award: cathodic protection of offshore structures-history and current status [J]. Corrosion, 2012, 68(12): 1063-1075
[12] Neville A, Morizot A P. Calcareous scales formed by cathodic protection-an assessment of characteristics and kinetics [J]. Cryst. Growth, 2002, 234: 490-502
[13] Yan J F, Nyuyen T V, White R E, et al. Mathematical modeling of the formation of calcareous deposits on cathodically protected steel in seawater [J]. Electrochem. Soc., 1993, 140(3): 733-744
[14] Lajevardi S A, Tafreshi H, Shahrabi T. Investigation of calcareous deposits formation on 5052 aluminium alloy under cathodic polarisation in natural and artificial sea water [J]. Corros. Eng. Sci. Technol., 2011, 46(3): 249-255
[15] Cabrini M, Lorenzi S, Marcassoli P, et al. Effect of hydrogen diffusion on environmental assisted cracking of pipeline steels under cathodic protection [J]. Metall. Ital., 2008, (2): 15-22
[16] Honarvar Nazari M, Allahkaram S R, Kermani M B. The effects of temperature and pH on the characteristics of corrosion product in CO 2 corrosion of grade X70 steel [J]. Mater. Design, 2010, 31: 3559-3563
[17] M?ller H. The influence of Mg 2+ on the formation of calcareous deposits on a freely corroding low carbon steel in seawater [J]. Corros. Sci., 2007, 49: 1992-2001
[18] Li C J, Du M, Li Y, et al. The influences of protection potentials on the formation of calcareous deposits in dynamic seawater [J]. Periodical Ocean Univ. China, 2011, 41 (7/8): 149-153 (李成杰, 杜敏, 李妍等. 动态海水中保护电位对钙质沉积层形成的影响 [J]. 中国海洋大学学报, 2011, 41(7/8): 149-153)
[19] Li C J, Du M. Research and development of cathodic protection for steel materials in deep seawater [J]. J. Chin. Soc. Corros. Prot., 2013, 33(1): 10-15 (李成杰, 杜敏. 深海钢铁材料的阴极保护技术研究及发展 [J]. 中国腐蚀与防护学报, 2013, 33(1): 10-15) |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
