通过在台洲海轮上进行的实船试验,研究了压载水舱在两个浸水周期中的保护电位变化以及四年实船试验的保护度与保护电流密度的关系。
A series of field experiments were made on Taizhouhai ship, whose wing water ballast tanks (WBT) were protected by zinc alloy sacrificial anodes. Various protection current densities were chosen according to the situation of coating, and the protection potentials were monitored by Zn/seawater reference electrodes during first two cycles of immersion. Variations of corrosion rate and protection percentage with protective current density during four year test were investigated. The results indicated that elevated temperature and stress accelerated corrosion. The higher was the protection current density, the lower was the corrosion rate. For the damaged coating, a protection current density of about 200 mA/m2 was suggested, while the protection potential would be lower than 0.15V(vs. Zn/seawater electrode). The higher protection current density for water ballast tank was recommanded.
参考文献
| [1] | 内堀利也.防锖管理,1979,23(11):12 |
| [2] | Herring Jr L C, Titcomb A N. AD-A120600, Investigation of Internal Corrosion and Corrosion Control Alternatives in Commercial Tankships, July, 1981 |
| [3] | 吴建华等.中国腐蚀与防护学报,1998 18:(2)131 |
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