| 摘要: |
| 于1989－1990年在室内条件下，用牺牲阳极保护浸泡于海水中的多种钢筋混凝土试件，测试不同试件中钢筋极化与阳极布局、涂层质量、涂层厚度及试件浸水情况的关系。结果表明。牺牲阳极能有效地保护全浸海水中的混凝土试件，对间断浸淋海水的试件也有一定的保护作用。通过改善阳极安装工艺，保护作用可望提高；电偶电流在各阴阳极上的分布将随涂层质量、涂层厚度和试件浸水情况不同而异；回路中电阻和电极极化情况是影响电流分布的主要因素。 |
| 关键词: 海洋钢筋混凝土 牺牲阳极保护 电极行为 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院“七五”重大项目，87－18-04号 |
|
| A STUDY ON ELECTRODE BEHAVIOUR OF SACRIFICIAL ANODE PROTECTION SYSTEM FOR MARINE REINF ORCED CONCRETE STRUCTURE |
|
Ji Mingtang, Ni Xiangyu, Yang Fangying
|
|
Institute of Oceanology Academia Sinica. Qingdao 266071
|
| Abstract: |
| A 1989 - 1990 laboratory study was made on electrode behaviour and the feasibility in a protection system for reinforced concrete specimen using sacrificial anodes. Concrete specimens with various quality and thickness of the concrete layer were used in a protection system which can produce various electric couples according to the requirements of test were designed. The galvanic current produced by the Al basic sacrificial anodes under different conditions, the current distribution on the cathodic bar, and the polarization behaviour of the cathode were measured.
The results showed that the current distribution on each cathode and anode was different according to the quality, thickness and the submerged condition of concrete specimen and the electric condition around the sacrificial anode. The galvanic curTent level depended mainly on the resistance and polarization behaviour of the electrode. The bar embedded in the concrete can effect full cathodic polarization, by the Al sacrificial, and the corrosion of the concrete specimen could be controlled effectively.
For concrete specimens submerged intermittently, the sacrificial anode can’nt play effectively due to the poor electric condition, but the protection provided by the sacrificial anode could be raised by improving the design and installation methods of the sacrificial anodes. |
| Key words: Marine reinforced concrete structure, Sacrificial anode protection, Electrode behaviour |
