Experience Using Electrochemical Noise for Testing Green Corrosion Inhibitors

2021 ◽  
Author(s):  
Douglas J Mills ◽  
Joshua Zatland ◽  
Nicola M Everitt
Keyword(s):  
Weight Loss ◽  
Crevice Corrosion ◽  
Corrosion Inhibitors ◽  
Electrochemical Noise ◽  
Banana Peel ◽  
Biomass Waste ◽  
Plant Materials ◽  
Complementary Interactions ◽  
Static Conditions ◽  
Green Corrosion Inhibitors

Abstract ‘Green’ corrosion inhibitors derived from plant materials provide environmentally friendly alternatives to conventional corrosion inhibitors. They are also much cheaper if using a biomass waste stream or abundant plant material as the source material. There are many examples in literature of different trials, from henna leaves to celery seeds to banana peel. Although it is known that extracts contain electron-rich polar atoms such as N, O, S and P which make them potentially effective inhibitors, it is difficult to predict on a molecular basis what will work well and what will not, since many interacting factors may be at play in complementary interactions. To assist in predicting the inhibition efficiency of inhibitors under varying conditions and choosing the most effective, what is needed is a short-term test which will obviate the need for tedious weight loss experiments. The Electrochemical Noise Method (ENM) uses the natural fluctuations which arise during electrochemical activity to gain information about the corrosion process. Using ENM is quick and non-intrusive method which makes it ideal for screening. Hence a rig has been designed and manufactured which allows for measurement to be made in stirred as well as static conditions and minimises the occurrence of crevice corrosion at the electrodes. Crevice corrosion is a hazard for ENM electrodes when trying to make a comparison with corrosion inhibition calculated using the standard weight loss measurement after immersion (WLM) method. For these preliminary trials we are exploring corrosion of mild steel in HCl in both stirred and unstirred conditions at room temperature. Results are presented comparing ENM measurements with conventional WLM for both Propargyl Alcohol (a conventional industrial corrosion inhibitor) and broccoli extract. Our results suggest that stirring does not make any difference to the noise measured in ENM. The amount of material lost calculated by ENM and WLM (Rn and weight loss values) can be directly compared and show close comparison. It seems likely that as a way of assessing inhibitors quickly (which is particularly important in the testing of "green" inhibitors) that this ENM approach has a lot to offer.

Corrosion Inhibition by a Caesalpinia Sappan L Modified Imidazoline for Carbon Steel API 5L Grade X60 in HCl 1M Environment

2018 ◽  
Vol 929 ◽  
pp. 158-170
Author(s):  
Adam Septiyono Arlan ◽  
Norman Subekti ◽  
Johny Wahyuadi Soedarsono ◽  
Andi Rustandi
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Impedance Spectroscopy ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibitors ◽  
Oil And Gas ◽  
Caesalpinia Sappan ◽  
Wide Range ◽  
Inhibition Performance ◽  
Green Corrosion Inhibitors

Acidizing is one of the stimulation technologies in the oil and gas industry by removing scale, rust, debris or other acid-soluble particulates on the pipe tubing internal surface. The most common acid used is HCl. To avoid problems such as pipe or casing tubing leak due to acidic corrosion, during the acidizing normally applied with inhibition treatment by inorganic corrosion inhibitor with various compositions including quaternary ammonium salts, solvent and often some surfactant to strip oil from acid reactive surfaces. However, most of these compounds are not only expensive but also toxic to the marine environment. It is an obvious remark to point out the importance of low cost, green corrosion inhibitors which is safe to the environment. The wood extract has become important as an environmentally acceptable, readily available and renewable resource for wide range of inhibitors. A Caesalpinia Sappan L modified imidazoline has been synthesized and used as a corrosion inhibitor for carbon steel in API 5L X60 in HCl 1M environment.The aim of the investigation is to find low dosage-high efficiency green corrosion inhibitor.The testing techniques include wheel test weight loss measurement, Tafel polarization and Electrochemical Impedance Spectroscopy (EIS), Fourier Transform Infra-red Spectroscopy (FTIR). The results of weight loss studies correlated well with those of polarization and Impedance Spectroscopy. Inhibition performance for both Caesalpinia Sappan L modified imidazoline ( CS IMI) and Imidazoline (IMI) increases with increasing inhibitor concentration. The formulated Caesalpinia Sappan L modified imidazoline ( CS IMI), and Imidazoline (IMI) inhibitors give a greater than 90% inhibition efficiency with dosage 25 ppm at a temperature of 90-140°F. Caesalpinia Sappan L modified imidazoline (CS IMI), and Imidazoline (IMI) show comparable inhibition performance. However, at temperature 140oF, Imidazoline (IMI) seems to have a slightly better performance, indicating better thermal stability. Caesalpinia sappan bioactive agents are brazilein and chalcone, and its inhibition mechanism by physisorption obey Langmuir Isotherm, this mode will control charge transfer at surface metal and electrolyte.This result confirms that Caesalpinia sappan modified imidazoline is very promising for the development of green corrosion inhibitors for oil and gas application

scholarly journals Green Corrosion Inhibitors from Biomass and Natural Sources

2021 ◽  
pp. 46-69
Author(s):  
A.N. Grassino
Keyword(s):  
Green Chemistry ◽  
Corrosion Inhibitors ◽  
Metals And Alloys ◽  
Significant Problem ◽  
Biological Origin ◽  
Plant Materials ◽  
Natural Sources ◽  
The World ◽  
The One ◽  
Green Corrosion Inhibitors

Considering the fact that corrosion of metals and alloys presents a significant problem all over the world, the one of most recently utilized approaches to combat this problem necessitates the researches for employment of new materials, which satisfied the green chemistry idea. In this connection, the development of sustainable corrosion inhibitors is highly demanded due to the increasing of awareness of green chemistry principles not only in corrosion discipline, but also in all branches of science and technology. Due to natural and biological origin as well as their eco-friendly extraction, the plant materials and biomass derived from various waste sources could be applied as beneficial substances for metals and alloys protection in different corrosion environment. Therefore, this work reports the main findings regarding their employments as green anticorrosion substances.

scholarly journals Green Inhibitors for Corrosion Protection of Metals and Alloys: An Overview

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
B. E. Amitha Rani ◽  
Bharathi Bai J. Basu
Keyword(s):  
Corrosion Inhibitors ◽  
Organic Dyes ◽  
Sol Gel ◽  
Metals And Alloys ◽  
Self Healing ◽  
Plant Materials ◽  
Time Required ◽  
Organic Corrosion Inhibitors ◽  
Green Corrosion Inhibitors ◽  
Protection Of Metals

Corrosion control of metals is of technical, economical, environmental, and aesthetical importance. The use of inhibitors is one of the best options of protecting metals and alloys against corrosion. The environmental toxicity of organic corrosion inhibitors has prompted the search for green corrosion inhibitors as they are biodegradable, do not contain heavy metals or other toxic compounds. As in addition to being environmentally friendly and ecologically acceptable, plant products are inexpensive, readily available and renewable. Investigations of corrosion inhibiting abilities of tannins, alkaloids, organic,amino acids, and organic dyes of plant origin are of interest. In recent years, sol-gel coatings doped with inhibitors show real promise. Although substantial research has been devoted to corrosion inhibition by plant extracts, reports on the detailed mechanisms of the adsorption process and identification of the active ingredient are still scarce. Development of computational modeling backed by wet experimental results would help to fill this void and help understand the mechanism of inhibitor action, their adsorption patterns, the inhibitor-metal surface interface and aid the development of designer inhibitors with an understanding of the time required for the release of self-healing inhibitors. The present paper consciously restricts itself mainly to plant materials as green corrosion inhibitors.

Electrochemical study of commercial and synthesized green corrosion inhibitors for N80 steel in acidic liquid

2019 ◽  
Vol 43 (40) ◽  
pp. 16058-16070 ◽  
Author(s):  
Yang Yaocheng ◽  
Yin Caihong ◽  
Ambrish Singh ◽  
Yuanhua Lin
Keyword(s):  
Corrosion Inhibitors ◽  
Electrochemical Study ◽  
Benzimidazole Derivatives ◽  
Corrosive Environment ◽  
Temperature Range ◽  
N80 Steel ◽  
Static Conditions ◽  
Green Corrosion Inhibitors

The present paper deals with the investigation of two synthesized benzimidazole derivatives (BZs) as corrosion inhibitors for N80 steel under static conditions in a 15% HCl corrosive environment and in the temperature range of 30 to 90 °C.

scholarly journals Novel pyrimidine-bichalcophene derivatives as corrosion inhibitors for copper in 1 M nitric acid solution

RSC Advances ◽  
2021 ◽  
Vol 11 (41) ◽  
pp. 25314-25333
Author(s):  
Mai A. Khaled ◽  
Mohamed A. Ismail ◽  
Ahmed. A. El-Hossiany ◽  
Abd El-Aziz S. Fouda
Keyword(s):  
Weight Loss ◽  
Electrochemical Impedance Spectroscopy ◽  
Nitric Acid ◽  
Impedance Spectroscopy ◽  
Acid Solution ◽  
Nitric Acid Solution ◽  
Potentiodynamic Polarization ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Pyrimidine Derivatives

This study targets the investigation of three pyrimidine derivatives (MA-1230, MA-1231, MA-1232) for the prevention of corrosion on copper in 1 M HNO3via weight loss (WL), potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS) techniques.

Sign in / Sign up

Export Citation Format

Share Document