scholarly journals Functional polyaspartic acid derivatives as eco-friendly corrosion inhibitors for mild steel in 0.5 M H2SO4 solution

RSC Advances ◽  
2018 ◽  
Vol 8 (44) ◽  
pp. 24970-24981 ◽  
Author(s):  
Chunxiao Chai ◽  
Yanhua Xu ◽  
Shuchen Shi ◽  
Xiaowei Zhao ◽  
Yufeng Wu ◽  
...  
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
H2so4 Solution ◽  
Polyaspartic Acid ◽  
Acidic Solutions ◽  
Corrosion Inhibition Efficiency

To improve the corrosion inhibition efficiency of polyaspartic acid (PASP) for mild steel in acidic solutions, PASP/N-(3-aminopropyl)imidazole (PD-1) and PASP/N-(3-aminopropyl)-imidazole-co-n-dodecylamine (PD-2) were synthesized.

New phosphonate based corrosion inhibitors for mild steel in hydrochloric acid useful for industrial pickling processes: experimental and theoretical approach

2017 ◽  
Vol 41 (21) ◽  
pp. 13114-13129 ◽  
Author(s):  
Neeraj Kumar Gupta ◽  
Chandrabhan Verma ◽  
R. Salghi ◽  
H. Lgaz ◽  
A. K. Mukherjee ◽  
...  
Keyword(s):  
Hydrochloric Acid ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Theoretical Approach ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Phosphorus Containing ◽  
Corrosion Inhibition Efficiency

Phosphorus containing compounds have been evaluated by experimental and theoretical techniques and more than 96% corrosion inhibition efficiency was observed at 200 ppm concentration.

Adsorption and corrosion inhibition characteristics of two medicinal molecules

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Hydrochloric Acid ◽  
Corrosion Rate ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Half Life ◽  
Thermodynamic Data ◽  
Inhibition Efficiency ◽  
Gravimetric Method ◽  
Corrosive Environment ◽  
Corrosion Inhibition Efficiency

The corrosion inhibition characteristics of two medicinal molecules phenylalanine and rutin on mild steel in 1.0M Hydrochloric acid were evaluated using gravimetric method. Corrosion inhibition efficiency of 83.78 and 90.40 % was obtained respectively after seven days. However, phenylalanine showed weak accumulative higher corrosion inhibition efficiency. The presence of both molecules in the corrosive environment reduced the corrosion rate constant and increased the material half-life. Thermodynamic data calculated suggests a spontaneous adsorption of the molecules on the mild steel’s surface.

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

2020 ◽  
pp. 41-51
Author(s):  
Lalita Saini ◽  
R. K. Upadhyay
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Acidic Medium ◽  
Trichloroacetic Acid ◽  
Inhibition Efficiency ◽  
Corrosion Inhibition Efficiency ◽  
Scanning Electron Microscope Method ◽  
Scanning Electron

Mass loss and Scanning Electron Microscope method (SEM) have been used to study the corrosion inhibition efficiency on mild steel and aluminium using synthesized inhibitors i.e. N-Benzylidene aniline (CI1) and N-Benzylidene 4-methylaniline (CI2) in Trichloroacetic acid (TCAA). Study reveals that both mild steel and aluminium are prone to corrosion in organic acid like TCAA. Out of these two metals, aluminium is more vigorously corroded by the TCAA in comparison to mild steel in same conditions and synthesized inhibitors CI1 and CI2 are almost same effective for mild steel and aluminium.

scholarly journals BIA, DPA, MBTA and DMA as Vapour Phase Corrosion Inhibitors for Mild Steel under Different Atmospheric Conditions

2013 ◽  
Vol 20 ◽  
pp. 52-66
Author(s):  
Harish Kumar ◽  
Vikas Yadav
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Salt Spray ◽  
Vapour Phase ◽  
Raw Material ◽  
Atmospheric Conditions ◽  
Sem Images ◽  
Corrosion Inhibition Efficiency ◽  
Diphenyl Amine

Mild steel is widely used as main raw material in fabrication of equipment, chief material of construction and as weapons. During its storage and transportation conditions, it comes in contact with aggressive environment which leads to decrease in mechanical strength and loss in useful properties. Four different vapor phase corrosion inhibitors (VPCIs) i.e. Benzaimidazole (BIA), Diphenyl amine (DPA), 2-mercapto benzothiazole (MBTA) and N,N-dimethyl aniline (DMA) were tested under different atmospheric conditions at 40 °C by Weight Loss, Eschke test, Salt Spray, SO2 test and SEM techniques. All the four VPCIs show good corrosion inhibition efficiency i.e. 65-96 %. The results obtained from all the four corrosion experiments were supported by SEM images.

Experimental Investigation of a New Derived Oleochemical Corrosion Inhibitor

2019 ◽  
Vol 796 ◽  
pp. 112-120
Author(s):  
Mysara Eissa Mohyaldinn ◽  
Wai Lin ◽  
Ola Gawi ◽  
Mokhtar Che Ismail ◽  
Quosay A. Ahmed ◽  
...  
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Dynamic Condition ◽  
Methyl Esters ◽  
Static Condition ◽  
Chemical Corrosion ◽  
Boron Fluoride

Most of the corrosion inhibitors that are used in industry contain chemicals that are harmful to health and environment. Corrosion inhibitors derived from green sources are, therefore, believed to be a good option for replacing the chemical corrosion inhibitors. In this work, a green oleochemical corrosion inhibitor derived from Jatropha Curcas is introduced. The paper discusses the methodology of deriving the corrosion inhibitor as well as the experimental test conducted for evaluating its corrosion inhibition efficiency. The new oleochemical corrosion inhibitor was derived via two reactions. Jatropha oil was firstly saponified with sodium hydroxide to yield gras acid and glycerol, which was then esterified with boron fluoride in presence of excess methanol to produce the oil methyl esters, which is used as oleo-chemical corrosion inhibitor. To evaluate the oleo-chemical corrosion inhibitor, the corrosion rate of mild steel in NaCl corrosive medium with CO2 is tested at static condition and two dynamic conditions, namely 500 and 1500 rpm. This is to simulate the transitional and turbulent flow in a pipeline. At each dynamic condition, the proposed corrosion inhibitor was tested at concentration dosages of 0, 50, 100, and 150 ppm. The experiments results revealed a good performance of the new oleochemical corrosion inhibitor. The inhibition efficiency was found to be highly affected by the concentration of corrosion inhibitor. Total corrosion inhibition of the mild steel was noticed by using 150 ppm at dynamic condition of 500 rpm.

scholarly journals Improvement in Corrosion Inhibition Efficiency of Molybdate-Based Inhibitors via Addition of Nitroethane and Zinc in Stimulated Cooling Water

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Saeed Mohammadi ◽  
Fatemeh Baghaei Ravari ◽  
Athareh Dadgarinezhad
Keyword(s):  
Electron Microscopy ◽  
Weight Loss ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Inhibition Efficiency ◽  
Cooling Water ◽  
Ac Impedance ◽  
Uniform Corrosion ◽  
Corrosion Inhibition Efficiency ◽  
Zinc Inhibition

An investigation was conducted to improve the corrosion inhibition efficiency of molybdate-based inhibitors for mild steel which is the main construction material of cooling water systems, using nitroethane as an organic compound beside zinc. In this study a new molybdate-based inhibitor was introduced with the composition of 60 ppm molybdate, 20 ppm nitrite, 20 ppm nitroethane, and 10 ppm zinc. Inhibition efficiency of molybdate alone and with nitrite, nitroethane, and zinc on the uniform corrosion of mild steel in stimulated cooling water (SCW) was assessed by electrochemical techniques such as potentiodynamic polarization and electrochemical impedance (AC impedance) measurements. Weight loss measurements were made with coupon testing specimens in the room temperature for 48 h. Studies of electron microscopy, including scanning electron microscopy (SEM) photograph and X-ray energy dispersive spectrometry (EDS) microanalysis, were used. The results obtained from the polarization and AC impedance curves were in agreement with those from the corrosion weight loss results. The results indicate that the new inhibitor is as effective as molybdate alone, though at one-ninth of the concentration range of molybdate, which is economically favorable.

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