施云芬,孙树森,张世龙,魏嘉馨,王伦,谭雨清.牺牲阳极和外加电流联合保护法在长输管道中的应用研究[J].表面技术,2019,48(8):286-295.
SHI Yun-fen,SUN Shu-sen,ZHANG Shi-long,WEI Jia-xin,WANG Lun,TAN Yu-qing.Application of Combined Protection of Sacrificial Anode and Applied Current in Buried Pipeline[J].Surface Technology,2019,48(8):286-295 |
| 牺牲阳极和外加电流联合保护法在长输管道中的应用研究 |
| Application of Combined Protection of Sacrificial Anode and Applied Current in Buried Pipeline |
| 修订日期：2019-08-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.08.038 |
| 中文关键词: 牺牲阳极 外加电流 准固态电解质 联合保护 埋地管道 腐蚀速率 |
| 英文关键词:sacrificial anode external current quasi-solid electrolytes joint protection buried pipeline corrosion rate |
| 基金项目: |
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| Author | Institution |
| SHI Yun-fen | 1.School of Chemical Engineering, Northeast Electric Power University, Jilin 132011, China |
| SUN Shu-sen | 1.School of Chemical Engineering, Northeast Electric Power University, Jilin 132011, China |
| ZHANG Shi-long | 2.Huadian Weifang Power Generation Co., Ltd, Weifang 261000, China |
| WEI Jia-xin | 1.School of Chemical Engineering, Northeast Electric Power University, Jilin 132011, China |
| WANG Lun | 3.Jilin Songhua River Thermal Power Co., Ltd, Jilin 132011, China |
| TAN Yu-qing | 1.School of Chemical Engineering, Northeast Electric Power University, Jilin 132011, China |
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| 中文摘要: |
| 目的 针对传统阴极保护在长输管道方面存在的不足，研发出新型牺牲阳极和外加电流联合阴极保护埋地管道的装置及方法。方法 通过牺牲阳极和外加电流单独的优化实验，找到最佳的牺牲阳极材料及规格和外加电流的电压，制备优良的准固态电解质，给装置提供稳定的运行环境，搭建出联合保护装置，将其应用在埋地管道中，实现有效的保护。结果 牺牲阳极实验部分，通过对管道保护效果的对比，选择出最佳条件为5 cm×5 cm的镁材料，其管道的腐蚀速率为2.936×10–3 mg/(min∙cm3)，阳极的消耗速率为0.135× 10–3 mg/(min∙cm3)，所产生的电流最大可达0.113 A，稳定时电流趋于0.07 A。外加电流实验部分，通过对管道保护效果的对比，选择出最佳条件为1 V的电源电压，其管道的腐蚀速率为2.150×10–3 mg/(min∙cm3)，并且其电能的消耗最少。准固态电解质实验部分，通过对溶剂、溶质、凝胶剂和金属电解质的优化，制备出电导率稳定在5.83 mS/cm左右、挥发度小于0.2%、显碱性的准固态电解质。在最佳条件下搭建出联合保护装置，通过与单独的传统阴极保护法对比，镁阳极消耗量为1.875 g，阳极消耗速率为0.123× 10–3 mg/(min∙cm3)，消耗速率下降了10%，管道的腐蚀速率为0.82×10–3 mg/(min∙cm3)，下降了62%左右，并且可以有效地减少防护过程中的电能消耗。结论 牺牲阳极和外加电流联合保护法在埋地管线中可以达到有效的保护，相比牺牲阳极和外加电流单独实验的保护指标，有明显的提升。 |
| 英文摘要: |
| The work aims to develop new devices and methods for sacrificial anodes and impressed current combined cathodic protection buried pipelines in view of the shortcomings of traditional cathodic protection in long-distance pipelines. Through independent optimization experiments of sacrificial anode and applied current, the best sacrificial anode material and dimensions and the voltage of the applied current were found. Meanwhile, excellent quasi-solid electrolytes were prepared in order to provide a stable operating environment for the device and built a joint protection device which was to be applied in buried pipelines to realize effective protection. In the experimental part of the sacrificial anode, the magnesium material with the best condition of 5 cm×5 cm was selected by comparing the protection effect of the pipelines. The corrosion rate of the pipeline was 2.936×10–3 mg/(min∙cm3), and the consumption rate of the anode was 0.135×10–3 mg/(min∙cm3). The current generated could reach 0.113 A at most, and the current tended to 0.07 A when it was stable. In the experimental part of the applied current, through the comparision of the protection effect of the pipeline, the best condition was 1 V power supply voltage, the corrosion rate of the pipeline was 2.150×10–3 mg/(min∙cm3) and the power consumption was the least. In the experimental part of quasi-solid electrolyte, the solvent, solute, gel and metal electrolyte were optimized to prepare a quasi-solid electrolyte with conductivity of 5.83 mS/cm and volatility less than 0.2%. The joint protection device was built under the optimal conditions. Compared with the traditional cathodic protection method, the consumption of the anode material was 1.875 g, and the anode consumption rate was 0.123×10–3 mg/(min∙cm3). The consumption rate decreased by 10% and the corrosion rate of the pipeline was 0.082×10–3 mg/(min∙cm3), reducing by about 300%. Thus, the power consumption during the protection process could be effectively reduced. The sacrificial anode and impressed current combined protection method can effectively protect the buried pipeline, and the protection index of the sacrificial anode and the applied current alone are obviously improved. |
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