Preparation and Properties of Diesel Oil Microemulsified Acid*

The microemulsified acid system composed by diesel oil, hydrochloric acid and emulsifier was investigated in this paper. The stability of microemulsified acid and the phase behavior of the microemulsified system were studied. The size distribution and the corrosion inhibition performance were also observed. The results showed that the diesel oil microemulsified acid system possessed small size and good stability under different temperature. The tolerance to CaCl2 reached 80 g·L−1. Compared with the same concentration hydrochloric acid solution, the corrosion inhibition performance of the diesel oil microemulsified acid system was remarkable.