In order to investigate whether magnetic treatment and 2-mercaptobenzothiazole (MBT) have synergistic effect on corrosion inhibition

corrosion rate of red copper was measured under different treatment conditions by weight loss method. The treatments included permanent magnetic field

alternative magnetic field

corrosion inhibitor MBT

and combination of MBT and magnetic field. Mechanism of corrosion inhibition was studied with assistance of SEM

XRD and ATR-FTIR. The results showed that permanent magnetic field had little effect on corrosion inhibition

but alternative magnetic field had some improvement on corrosion inhibition by forming compact oxide film on copper surface. Alternative magnetic field reduced water polarity and gave water molecules power and activity

which increased MBT solubility in water and adsorbance on copper surface. Therefore

combination of alternative magnetic field and MBT has synergistic effect on corrosion inhibition. To achieve same corrosion inhibition effect as MBT itself

synergistic effect could decrease MBT usage by 60%. Because MBT is dissolved in NaOH solution

less MBT will reduce alkali consumption and lower conductivity of cooling water in power generator.