为实现循环冷却水微碱化调质的平稳控制,抑制换热器金属件表面的腐蚀,考察了H68黄铜在以H2O2为钝化剂的Na2CO3-NaHCO3缓冲溶液中的腐蚀行为.通过正交试验优选了H2O2浓度、温度及碱度等成膜条件;通过电化学试验研究了循环冷却水微碱化阶段换热器钝化膜形成及发展过程.结果表明:H2O2浓度为0.6％,溶液碱度为18 mmol/L,温度20～30℃条件下钝化后,H68黄铜表面产生了薄而致密的Cu2O膜,在碱度为3.0 mmol/L的碳酸盐溶液中挂片12 d后,其腐蚀速率仅为0.000 6 mm/a;在碱度为2.0～ 3.0 mmol/L的微碱化循环冷却水中,氧化膜的阻抗和厚度先逐渐降低,48 h之后最低,之后上升,至144 h后达到稳定,并恢复至初始水平,氧化膜转化为颗粒较粗CuO膜;本工艺实现了循环冷却水微碱化过程中钝化膜形成与发展的平稳过渡,换热器H68黄铜件表面形成了致密的氧化膜,既防止了局部腐蚀又抑制了均匀腐蚀.
参考文献
| [1] | Abdallah Y M;Hassan H M;Shalabi K.Effects of Arctostaphylos uva-ursi Extract as Green Corrosion Inhibitor for Cul0Ni Alloy in 1 M HNO3[J].International Journal of Electrochemical Science,2014(9):5073-5091. |
| [2] | Radovanovic M B;Petrovic M B;Simonovic A T et al.Cysteine as a green corrosion inhibitor for Cu37Zn brass in neutral and weakly alkaline sulphate solutions[J].ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2013,20(7):4370-4381. |
| [3] | Fouda A S;Elewady G Y;Shalabi K.Gibberellic acid as green corrosion inhibitor for carbon steel in hydrochloric acid solutions[J].J Mater Environ Sci,2014(5):767-778. |
| [4] | Rodríguez-Torres A;Valladares-Cisneros M G;GonzalezRodríguez J G.Use of Salvia Officinalis as Green Corrosion Inhibitor for Carbon Steel in Acidic Media[J].International Journal of Electrochemical Science,2015(10):4053-4067. |
| [5] | 安慧凤,刘智安,赵巨东,张旭,龙山,赵婧,夏添,张欣.高压静电场对火电厂循环冷却水阻垢效果及机理[J].环境工程学报,2013(11):4295-4299. |
| [6] | Zhao J D;Liu Z A;Zhao E J .Combined effect of constant high voltage electrostatic field and variable frequency pulsed electromagnetic field on the morphology of calcium carbonate scale in circulating cooling water systems[J].Water Science and Technology,2014,70(6):1074-1082. |
| [7] | 张旭,刘智安,赵巨东,龙山,赵婧,夏添,张欣,安慧凤.磁电复合式循环冷却水阻垢处理装置及阻垢实验研究[J].工业水处理,2013(10):34-36,82. |
| [8] | Zeng H;Lin J;Ye C et al.Ion Exchange Softening and Alkalization Treatment for Zerodischarge of Circulating Cooling Water[J].Journal of Electromagnetic Analysis and Applications,2009(1):6-10. |
| [9] | Lin J;Ye C;Zeng H.Nanofiltration and Ion-Exchange Alkalinization for Water Conservation and Zero-Discharge in Circulating Cooling Water System[A].Wuhan:IEEE,2009:1-4. |
| [10] | 刘福国,杜敏.复合缓蚀剂在31%NaCl溶液中的缓蚀性能[J].腐蚀与防护,2007(10):523-525. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%