本文采用失重法、电化学测试技术、EDAX能谱和X-射线衍射等方法考察了Na2 MoQ-B复合缓蚀剂对55％ LiBr+ 0.07 mol/L LiOH溶液中碳钢的缓蚀行为.结果表明,240℃时添加800 mg/L Na2MoO4-B复合缓蚀剂的55％ LiBr+0.07 mol/L LiOH溶液中碳钢腐蚀速度为44.11 μm/a.沸腾的55％ LiBr+ 0.07mol/L LiOH溶液中添加复合缓蚀剂后碳钢电化学性能明显改善,腐蚀电位正移,钝化电位区间拓宽,钝化电流密度降低,常相位角元件CPE的Y0值减小,反应电阻Rt值增加,缓蚀效率可达98.88％.Na2MoO4-B复合缓蚀剂中的B缓蚀剂可使55％ LiBr溶液中Na2 MoO4的溶解度提高至800 mg/L以上.Na2MoO4通过氧化作用可使碳钢表面形成一层主要由Fe3O4、MoO2和MoO3组成的致密钝化膜,从而起到较好的缓蚀作用.
参考文献
| [1] | BLASCO-TAMARIT E;GARCíA-GARCía D M;GARC íA ANTóN J .Imposed potential measurements to evaluate the pitting corrosion resistance and the galvanic behaviour of a highly alloyed austenitic stainless steel and its weldment in a LiBr solution at temperatures up to 150℃[J].Corrosion Science,2011,53(02):784-795. |
| [2] | R.M. Fernandez-Domene;E. Blasco-Tamarit;D.M. Garcia-Garcia;J. Garcia-Anton .Thermogalvanic corrosion of Alloy 31 in different heavy brine LiBr solutions[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2012(Feb.):40-53. |
| [3] | R.M. Fernandez-Domene;E. Blasco-Tamarit;D.M. Garcia-Garcia;J. Garcia-Anton .Thermogalvanic effects on the corrosion of copper in heavy brine LiBr solutions[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2012(Oct.):304-315. |
| [4] | X. Q. Hu;C. H. Liang;X. N. Wu .Corrosion behaviors of carbon steel in 55% LiBr solution containing PWVA inhibitor[J].Materials and Corrosion,2011(5):444-448. |
| [5] | LIANG Cheng-hao,HU Xian-qi.Inhibition Performance of Enhanced-Mo Inhibitor for Carbon Steel in 55% LiBr Solution[J].钢铁研究学报（英文版）,2008(01):49-54. |
| [6] | ABD EI MEGUID E A;AWAD N K .Eleetrochemical pitting corrosion behaviour of-brass in LiBr containing solutions[J].Corrosion Science,2009,51(05):1134-1139. |
| [7] | Al-REFAIE A A;WALTON J;COTTIS R A et al.Photoelectron spectroscopy study of the inhibition of mild steel corrosion by molybdate and nitrite anions[J].Corrosion Science,2010,52(02):422-428. |
| [8] | Xianghong Li;Shuduan Deng;Hui Fu .Sodium molybdate as a corrosion inhibitor for aluminium in H_3PO_4 solution[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2011(9):2748-2753. |
| [9] | F. Eghbali;M.H. Moayed;A. Davoodi;N. Ebrahimi .Critical pitting temperature (CPT) assessment of 2205 duplex stainless steel in 0.1 M NaCl at various molybdate concentrations[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2011(1):513-522. |
| [10] | M. A. Ramirez-Arteaga;J. G. Gonzalez-Rodriguez;I. Rosales;G. Dominguez-Patino;A. Martinez-Villafane;M. A. Neri-Florez .Corrosion inhibition of 70Cu-30Ni alloy in LiBr + ethylene Glycol+H_2O mixtures by inorganic compounds[J].Materials and Corrosion,2011(1):41-46. |
| [11] | ITOH M;MIDORIKAWA M;Izumiya M et al.Corrosion inhibition of carbon steel by lithium molybdate in concentrated LiBr solution at elevated temperatures[J].Corrosion Engineering,1990,39(06):321-330. |
| [12] | LABJAR Najoua;LEBRINI Mounim;BEBTISS Foua d et al.Corrosion inhibition of carbon steel and antibacterial properties of aminotris-,(methylenepbosphonic) acid[J].Materials Chemistry and Physics,2010,119(1-2):330-336. |
| [13] | MACDONALD J R .Impedance spectroscopy and its use in analyzing the steady state AC impedance response of solid and liquid electrolytes[J].J Electroanal Chem,1987,223:25-50. |
| [14] | LIANG Chenghao,HUANG Naibao,GUO Jianwei,HU Xianqi.INHIBITION MECHANISM OF Na2MoO4 FOR CARBON STEEL IN 55% LiBr SOLUTION[J].机械工程学报（英文版）,2007(04):15-18. |
| [15] | SUITOR J W;MARNER W J;RITTER R B .The history and status of research in fouling of heat exchanger in cooling water service[J].Canadian Journal of Chemical Engineering,1977,55:374-380. |
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