Abstract
Corrosion inhibition behaviour of sodium dodecyl benzene sulphonate (SDBS) towards brass in simulated cooling water (SCW-SDBS) and Al2O3 nanofluid (SCW-SDBS-Al2O3) was investigated by electrochemical methods and surface analysis techniques. SDBS adsorbed on the brass surface and exhibited some corrosion inhibition in both media. The brass surface was covered mainly by Zn5(OH)6(CO3)2 and Cu2O in SCW, Cu2O and SDBS aggregates in SCW-SDBS, and a relatively uniform SDBS film in SCW-SDBS-Al2O3 nanofluid. Al2O3 nanoparticles and SDBS exhibited a synergistic effect of inhibiting brass corrosion due to their electrostatic adsorption and the obvious increase of critical micelle concentration of SDBS by the nanoparticles.
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