Journal
METALS AND MATERIALS INTERNATIONAL
Volume 27, Issue 12, Pages 5046-5058Publisher
KOREAN INST METALS MATERIALS
DOI: 10.1007/s12540-020-00835-1
Keywords
Magnetic field; Corrosion inhibitor; Dipole moment; Inhibition efficiency
Funding
- National Natural Science Foundation of China [51871105]
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The application of a magnetic field can improve the inhibition efficiency, particularly for inhibitors with larger dipole moments. The maximum impedance increased three times when the magnetic field reached 12 mT.
Dodecylamine, quinoline, allylthiourea, and thiourea, whose dipole moments were calculated by quantum chemistry and in gradient rise, were used to study the influence of magnetic field on inhibition effect through weight loss experiments, electrochemical measurements, and surface characterizations. Results confirmed that the inhibition efficiency can be improved to varying extents with the application of the magnetic field. In addition, maximum impedance increased three times more than that in controlled trial when the magnetic field increased to 12 mT. Furthermore, the inhibition efficiency of inhibitors with larger dipole moment will be affected more obviously, which was also positively related to the magnetic field strength. The mechanism of variation in polarizability of molecules was proposed to explain the effect of the magnetic field. [GRAPHICS] .
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