Study on the efficiency of some amine derivatives as corrosion and scale inhibitors in cooling water systems

Abstract

Corrosion and scaling are the main problems in cooling water systems. To address these problems, this paper aimed to study the inhibition efficiency of some amine derivatives for carbon steel in sea water using electrochemical techniques such as potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The selected compounds, with different structures and sizes, were found to be adsorbed onto the carbon steel surface and had good performance as corrosion and scale inhibitors.Potentiodynamic polarization studies indicate that the amine derivatives act as mixed type corrosion inhibitors, while the data obtained from EIS revealed that the value of the charge transfer resistance (R t ) increased when increasing the inhibitor concentration leading to an increase in the inhibition efficiency.Also, the obtained results from this study show that the selected amines can decrease scale build-up growth under the experimental conditions. The surface morphology of the carbon steel was investigated in the absence and presence of the selected inhibitors through scanning electron microscopy (SEM) and energy dispersive analysis of X-rays.

The synthesis and characterization of benzotriazole-based cationic surfactants and the evaluation of their corrosion inhibition efficiency on copper in seawater

“…Moreover, the variability of Tafel slopes (b a and b c ) approved that cathodic and anodic reactions, and oxygen reduction and metal dissolution were affected without modifying the mechanism of corrosion. 28 There is no noticeable shi in the corrosion potential values by adding the inhibitor molecules to both anodic and cathodic areas, which does not exceed 85 mV. Therefore, the assynthesized compounds can be categorized as mixed-type compounds.…”

“…All the previous electrochemical impedance parameters plus the charge transfer resistances (R ct ) and the inhibition efficiency (h%) values are listed in Table 6. The following equation can be used to calculate the values of the inhibition efficiency h% from (R ct ) values: 12,28,31 h%…”

Ionic Liquids as Green Corrosion Inhibitors for Industrial Metals and Alloys

“…Unlike to traditional volatile corrosion inhibitors, due to their extremely low vapour pressure these compounds will not evaporate and will not contaminate the surrounding environment [67,68]. Additionally, sometimes the use of organic inhibitors particularly polymeric and high molecular weighted organic compounds is limited due to their extremely low solubility in the polar corrosive media [69][70][71][72]. However, ionic liquids are highly soluble in the polar corrosive environments due to their ionic nature [73].…”

Synthesis of a polyaspartic acid/4‐(2‐aminoethyl) morpholine graft copolymer and evaluation of its scale and corrosion inhibition performance

“…Most of the scales attached to the equipment surface are made of CaCO 3 , while a certain amount of CaSO 4 and Ca 3 (PO 4 ) 2 are also present, and these compounds are formed through a complex crystallization process. Currently, the addition of chemical inhibitors to water is the most common and practical method of reducing and preventing scaling . However, the clear majority of industrial equipment in operation will inevitably suffer from the deposition of scale.…”

“…Currently, the addition of chemical inhibitors to water is the most common and practical method of reducing and preventing scaling. 3 However, the clear majority of industrial equipment in operation will inevitably suffer from the deposition of scale. Pickling is widely used in the scale cleaning of various industrial equipment, such as boilers, pipes, dynamic systems, and heat exchangers.…”