摘要
将酸雨对非金属建筑材料的整个腐蚀过程分为腐蚀初期、中期和末期３个腐蚀阶段，进而提出腐蚀机理。对整个腐蚀过程探讨表明：酸雨对材料的腐蚀是酸雨中Ｈ＋和ＳＯ２－４共同侵蚀作用的结果；Ｈ＋将溶解硬化水泥石中的Ｃａ（ＯＨ）２，ＳＯ２－４将与硬化水泥石作用生成膨胀性的物质ＣａＳＯ４·２Ｈ２Ｏ。因此，酸雨对非金属建筑材料的腐蚀，主要是Ｈ＋引起溶解腐蚀和ＳＯ２－４引起的膨胀腐蚀。
The whole process of acid rain corrosion to non-metal building materials was divided into three stages, namely initial stage, middle stage and last stage, and then the corresponding mechanism has been put forward. The study on the whole corrosion process shows that the damage of acid rain to the materials is a result of coordination corrosion of H + and SO 2- 4; with H + in acid rain, Ca(OH) 2 in hardened cement paste will dissolve and the reaction between SO 2- 4 and Ca(OH) 2 will produce CaSO 4·2H 2O with expanding volume. Therefore, the main cause of corrosion of non-metal building materials by acid rain is the mechanism of dissolution corrosion caused by H + and expanding corrosion by SO 2- 4.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
1998年第2期15-17,共3页
Research of Environmental Sciences
关键词
酸雨
腐蚀
非金属建筑材料
Acid rain
Concrete
Sand-lime slurry
Corrosion mechanism
