温州地区浅层软水腐蚀性评价研究

CORROSION EVALUATION OF SHALLOW SOFT WATER IN WENZHOU

为查明温州地区浅层软水化学特征,准确进行腐蚀性评价,基于对区内219个水样化学分析成果数理统计、腐蚀机理与腐蚀环境的分析,进行工程结构腐蚀性验证调查,修正我国岩土规范地下水腐蚀性评价方法中HCO~-_3腐蚀性含量界限值,尝试提出了适用于温州地区的腐蚀性评价标准,并进行区域浅层软水综合腐蚀性评价。研究结果表明:研究区浅层软水分布较广泛,各地貌区占比有显著差异。浅层软水大多数腐蚀性介质含量处于自然低背景的状态,其中HCO_(3)^(-)含量最高。腐蚀性综合评价表明,研究区浅层软水大部分均具有微腐蚀性,只有少部分具有弱腐蚀性,不存在中腐蚀性。

In order to ascertain the chemical characteristics of shallow soft water in Wenzhou area and accurately evaluate the corrosion,based on the analysis of the mathematical statistics,corrosion mechanism and corrosion environment of the 219 water samples in the area,the corrosiveness verification survey of the engineering structure was carried out.Corrosion evaluation standards applicable to Wenzhou area were proposed,and comprehensive shallow water soft corrosion evaluation was carried out.The results of the study show that the shallow soft water in the study area is widely distributed,and the proportion of the appearance areas differs significantly.The content of most corrosive media in shallow soft water is in a naturally low background state,with the highest content of HCO-3.Comprehensive evaluation of corrosion shows that most of the shallow soft water in the study area is slightly corrosive,only a small part is weakly corrosive,and there is no moderate corrosion.