Polyamine compound as a volatile corrosion inhibitor for atmospheric corrosion of mild steel*

Abstract

Bis-piperidiniummethyl-urea (BPMU) was developed as a volatile corrosion inhibitor (VCI) for mild steel. Its vapor corrosion inhibition property was evaluated by volatile inhibiting sieve test (VIS). Electrochemical measurements were conducted in simulated atmospheric corrosion water. Electrochemical impedance spectroscopy of a volatile corrosion inhibitor monitor cell (VCIM) was applied to study the effect of BPMU on the corrosion inhibition of mild steel under a thin electrolyte layer. The results show that BPMU has good protection effect for steel. It suppressed the anodic reaction of the steel electrode in a manner of promoted passivation. Fourier transform infrared (FT-IR) spectroscopy was used to characterize the adsorption of BPMU on the steel surface.

Inhibition Behavior of a Novel Acidification Inhibitor for Steels at High Temperature

“…These characteristics indicated that the QL-03 inhibitor act as mixed type inhibitor with predominant control of cathodic reaction. The similar passivation of cathodic polarization curves may be caused by the reaction of oxygen atoms in solution with nitrogen-containing active group of inhibitor molecules [8].…”

Experimental Investigation of Inhibition on Mild Steel Corrosion in Two Different Acid Mediums by Synthesized Piperazin Derivatives

“…Many researchers investigate corrosion inhibitor studies by using various synthesized organic compounds that contain heteroatoms, oxygen and sulphur atoms in their rings [8][9][10][11] . On a report of consumption productivity on copper and its combination, the benzotriazole compound shows a superior inhibition proficiency 12,13 . Three salts of Morpholine in particular Morpholine carbonate, phosphate, and borate, displayed 90% hindrance productivity, while outstanding salts showed an extremely low rate of 40% restraint proficiency 14,15 .…”

A Comparative Study on the Corrosion Inhibition of Mild Steel and Aluminium by Synthesized Inhibitors in Organic Acidic Medium

“…Because of this both metals have been a subject of numerous studies. They both are however highly reactive metals and are prone to corrosion, therefore the inhibition of aluminium and mild steel by organic compounds in acids have been studied by many workers [7][8][9][10][11]. For corrosion inhibition, different methods are there, among all these methods, addition of corrosion inhibitor is best, most economic and highly effective method.…”