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Citation: CHEN Fu, LI Xilu, AI Jiawei, CHEN Hongjun, WEI Yunjin. Laboratory Research of One Micro-Emulsified Acid System[J]. Chinese Journal of Applied Chemistry, ;2011, 28(9): 1058-1062. doi: 10.3724/SP.J.1095.2011.00607 shu

Laboratory Research of One Micro-Emulsified Acid System

1.
College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500

Corresponding author: CHEN Fu,
Received Date: 12 October 2010
Available Online: 5 December 2010

Single phase micro-emulsified acid was studied in laboratory aimed at reducing its corrosion on pipes in the process of acidizing and increasing the penetration range of the layer. Micro-emulsified acid were prepared by mixing cationic surfactant with nonionic surfactant and other additives. The laboratory formation of the single phase micro-emulsified mud acid were as following(mass ratio):2.5% A-126, 2.5% CHJ-100, 1.2% n-butanol, 2.3% n-octanol, 0.5% W-221, 67.0% mud acid, 24.0% diesel oil. The result shows that its thermal stability can reach 81℃ with the suitable amount of additive of anionic surfactant W-221. The reactions between the micro-emulsified acid and P110S steel under both room temperature and 70℃ showed that the ratio of inhibiting corrosion has reached to 90.57% compared with mud acid of the same concentrations. Finally, the reaction between the acid and man-made rock core under 70℃ shows that the corrosion rate reduce to 0.5%.
- micro-emulsified acid,
- surfactant,
- corrosion inhibiting,
- temperature resistance
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