Chung W S, Yu M J, Lee H D
Construction Environment Research Department, Korea Institute of Construction Technology, 2311, Daehwa-dong, Ilsan-ku, Koyang, Kyonggi-do, 411-712, Republic of Korea.
Water Sci Technol. 2004;49(2):19-26.
The drinking water network serving Korea has been used for almost 100 years. Therefore, pipelines have suffered various degrees of deterioration due to aggressive environments. The pipe breaks were caused by in-external corrosion, water hammer, surface loading, etc. In this paper, we focused on describing corrosion status in water distribution pipes in Korea and reviewing some methods to predict corrosion rates. Results indicate that corrosive water of lakes was more aggressive than river water and the winter was more aggressive compared to other seasons. The roughness growth rates of Dongbok lake showed 0.23 mm/year. The high variation of corrosion rates is controlled by the aging pipes and smaller diameter. Also the phenolphthalein test on a cementitious core of cement mortar lined ductile cast iron pipe indicated the pipes over 15 years old had lost 50-100% of their lime active cross sectional area.
为韩国供水的饮用水网络已使用近100年。因此，由于恶劣的环境，管道遭受了不同程度的损坏。管道破裂是由内外腐蚀、水锤、地面荷载等原因造成的。在本文中，我们着重描述了韩国配水管网的腐蚀状况，并回顾了一些预测腐蚀速率的方法。结果表明，湖水的腐蚀性比河水更强，而且冬季比其他季节更具腐蚀性。东柏湖的粗糙度增长率为每年0.23毫米。腐蚀速率的高变化受老化管道和较小管径的控制。此外，对水泥砂浆内衬球墨铸铁管的水泥芯进行酚酞试验表明，使用超过15年的管道已损失了50%-100%的石灰活性横截面积。
