钢筋混凝土电杆的腐蚀及防护

CORROSION AND PROTECTION OF REINFORCED CONCRETE POWER POLES

钢筋混凝土电杆已经取代了木电杆。混凝土电杆损坏的主要原因之一就是钢筋的腐蚀。它起因于含盐地下水进入电杆 ,并由于水分蒸发导致氯离子浓缩而受到加速。在电杆开始出现外部可见的腐蚀迹象之前 ,用单极法或两电极法进行电位测试是检查电杆腐蚀活性的一种可行的办法。最后还简要讨论了相应的各种防腐蚀措施。

The reinforced concrete has taken the place of wood for power poles One of the main causes of deterioration of the concrete polesis corrosion of the rebar It results from the ingression of saline ground water into the pole and is accelerated by the concentration of chloride ions due to the evaporation of moisture Potential survey conducted with single electrode method or two electrode method is a viable non destructive means of detecting corrosion activity of the poles before the onset of visual evidence Various protection measures are reviewed briefly