摘要
为探究近年来频繁出现的雾霾天气对铁塔的腐蚀影响,防止铁塔的加速腐蚀,从空气相对湿度、p H值、雾霾污染离子浓度和腐蚀时间4个影响因素对铁塔进行了实验研究。实验采用浓甘油控湿法控制空气相对湿度,并配制不同浓度的模拟雾霾天气浸润液,以干湿交替周期浸润的方法对碳钢试片进行腐蚀实验,得出雾霾天气4个因素对铁塔的腐蚀影响。实验表明,雾霾天气空气相对湿度加大,当超过65%时,试片的腐蚀速率明显加快,且污染离子浓度增大,p H值降低,铁塔表面电解液呈弱酸性致使保护层溶解,形成锈层,而随着腐蚀时间的延长,铁塔表面锈层继续发生电化学腐蚀,铁塔腐蚀程度加深从而形成腐蚀坑,在雾霾天气中的腐蚀更甚于一般的大气腐蚀。
To explore the effects of fog and haze weather corrosion on the towers in recent years and to prevent the tower being corrosion accelerated, this experimental study is implemented for four factors, such as air relative hu- midity, pH value, haze pollution ion concentration and corrosion time. In the experiment, concentrated with glyc- erin control wet, applied infiltration fluid simulating haze weather, dry and wet alternate cycle infiltration method is carried out and the effects of the four factors to the tower corrosion are obtained. Experiment results show that when the fog and haze air relative humidity increase more than 65%, the corrosion rate of the test piece is accelerated obviously, and the pollution ion concentration increases, the pH down, the electrolyte of tower surface is acidic, which result in surface protective layer being dissolved, forming rust, corrosion and with the extension of time, the tower surface rust layer electrochemical corrosion continues to occur, thereby forming a tower to deepen the degree of corrosion pits, so the corrosion in fog and haze weather is more worse than the general atmospheric eorrosion.
出处
《电力科学与工程》
2014年第12期35-38,45,共5页
Electric Power Science and Engineering
关键词
雾霾天气
铁塔
腐蚀
haze weather
tower
corrosion
