硅酸盐学报2012，Vol.40Issue(5)：671-676,6.
硫酸腐蚀后油井水泥石的性能及微观结构
Properties and Microstructure of Oil-Well Cement Stone Attacked by Vitriol
摘要
Abstract
The effect of vitriol on the strength and microstructure of hardened oil-well cement paste was investigated.The results show that the strength decreases,and harmful pores with the size of 100 nm increases and the hydration products become more po-rous when the hardened cement paste is attacked by vitriol.Also,the composition of the cement paste changed due to the generation of a new corrosion product CaSO4？2H2O.The vitriol corrosion resistance performance of hardened cement paste was correlated to the microstructure as well as the mineral composition.The vitriol corrosion resistance performances of different hydration products were different.Ca（OH）2 was more vulnerable rather than the C-S-H gel.Most of the pores generated in the C-S-H gel corrosion process were smaller,but most of the pores generated in the process of Ca（OH）2 corrosion were larger than 100 nm.The corrosion of Ca（OH）2 was thus more harmful to the macroscopic properties of hardened cement paste rather than the corrosion of C-S-H.The reduction of the Ca（OH）2 content in the hardened paste could be an effective way to improve its vitriol corrosion resistance performance.关键词
油井水泥石/硫酸/腐蚀/微观结构Key words
oilwell cement stone/vitriol/corrosion/microstructure分类
建筑与水利引用本文复制引用
冯竟竟,阎培渝..硫酸腐蚀后油井水泥石的性能及微观结构[J].硅酸盐学报,2012,40(5):671-676,6.基金项目
国家自然科学基金-广东省联合资助重点项目 （）
国家“973”计划（2009CB623106）资助项目 （）
