The Effect of Corrosion Inhibitor in Hydrofluoric Acid Medium

Abstract:

The experiments were done to find some good corrosion inhibitors for mild steel in 5% HF solution by the method of weight loss and electrochemistry including polarization curves and electrochemical impedance spectroscopy (EIS). Results show that the thiourea, potassium thiocyanate, and hexamethylenetetramine have good inhibition effect for mild steel in 5% HF solution, especially potassium thiocyanate and thiourea. Their corrosion resistance was greatly enhanced in the presence of tested inhibitor. Thiourea is an anodic type inhibitor and its inhibition efficiencies up to 99.88% can be obtained. Equivalent circuit of the investigated system was suggested.

• Periodical: Advanced Materials Research (Volumes 750-752)
• Pages: 2258-2262
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.750-752.2258
• Online since: August 2013
• Authors: Wei Ming Wu, Ding Li, Hai Yan Du
• Keywords: Corrosion Inhibitor, EIS, Hydrofluoric Acid, Mild Steel, Polarization

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