Bio-inspired Corrosion Inhibition of Aluminium Metal in Alkaline Medium |Chapter 7 | Chemical and Materials Sciences - Developments and Innovations Vol. 4

 

The present study proposes to explore the impact of aluminum corrosion in an alkaline medium using an aqueous extract from Cyclea peltata leaves. The conventional approach to corrosion inhibitors has steadily evolved in recent years due to the increased global interest in environmental conservation and the detrimental consequences of chemical use on the ecological balance. Substances that are easily available, renewable, biocompatible, and acceptable to the environment are referred to as green inhibitors or eco-friendly inhibitors. In the present study, pure aluminium strips were used for electrochemical and physicochemical analysis. For experimental purposes, each coupon was cut into 2x3x0.05 cm dimensions. Plant extracts have been proven to be an excellent source for the development of environmentally benign and effective corrosion inhibitors for metals in alkaline medium and research on the topic is ever-increasing. In the present study, aqueous extract of Cyclea peltata leaves extract was used as a corrosion inhibitor for Aluminium coupon in an alkaline medium.

 

 

Author(s) Details

 

Suma N. D
Department of Chemistry, KSM Devaswom Board College, Sasthamcotta, 690521, India.

 

Please see the book here:- https://doi.org/10.9734/bpi/cmsdi/v4/1077

Chemical Removal of Carbonate Scale in Pipes from Oil and Gas Production | Chapter 5 | Chemical and Materials Sciences - Developments and Innovations Vol. 4

 

Scale deposition and corrosion are the two costliest problems in the oil industry. During the inspection and maintenance carried out in onshore wells in oil and gas production, the presence of adherent scales inside the pipes was revealed. The oil, natural gas and formation water produced in these onshore oil wells come from reservoir rocks rich in minerals such as calcite (CaCO3) and/or dolomite (CaCO3.MgCO3). The formation waters of these wells contain sufficient levels of Ca2+, Mg2+ and HCO3- ions to generate carbonate scale, causing restrictions on the flow of oil and gas production. To return to the initial conditions of oil production, it is necessary to remove the internal carbonate scales with hydrochloric acid injection and to prevent internal corrosion of carbon steel pipes, it is essential to add the corrosion inhibitor to the acid solution. The present study evaluates the dissolution of carbonate scale and the corrosion resistance of carbon steel using gravimetric (mass loss) and electrochemical (polarization) tests. Studies were completed with and without the addition of 250, 500 and 1,000 mg/L propargyl alcohol in HCl solutions with concentrations of 10 wt. % and 15% wt. % at temperatures of 25, 40 and 60 °C. Chemical analyses have revealed that carbonate scales are predominantly composed of 83% calcite, 2% dolomite and 2% kaolinite and the rest is made up of iron oxides and hydroxides. The hydrochloric acid solutions with 10 wt. % and 15 wt. % have become an excellent removing agent with a yield of more than 98%. The results of mass loss assays showed that the addition of propargyl alcohol in 10 wt. % and 15 wt. % HCl provided excellent protection to the carbon steel with an efficiency superior of 95%.

 

 

Author(s) Details

 

Fernando B. Mainier

Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.

Renata Jogaib Mainier

Universo – Universidade Salgado de Oliveira, S. Gonçalo, Rio de Janeiro, Brazil.

 

Please see the book here:- https://doi.org/10.9734/bpi/cmsdi/v4/1053

The occurrence of carbon dioxide (CO2) in many industrial processes promotes massive corrosion by crevices and pitting in the carbon steel that makes up most industrial processing equipment. This study presents the properties of carbonic acid (H2CO3) and, consequently, the mechanisms of its corrosive action. The mechanisms by which corrosion inhibitors work to inhibit the corrosive process caused by CO2 in the vapor and liquid phases are presented. Commercial formulations used to inhibit carbon dioxide corrosion must meet a number of quality assurance criteria and/or specifications, including solubility, active matter content, volatility, foaming tendency, residues and deposits. Evaluation and monitoring of the inhibiting ability of commercial formulations should be determined based on laboratory, pilot and field tests using carbon steel or other metal or alloy coupons. Finally, the toxicity of active substances and solvents used in commercial corrosion inhibitor formulations must be evaluated for potential harm to humans and the environment. Author(s) Details Fernando B. Mainier Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil. Renata Jogaib Mainier Universo – Universidade Salgado de Oliveira, S. Gonçalo, Rio de Janeiro, Brazil. Ailton Macedo Medeiros Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil. Humberto Nogueira Farneze Centro Federal de Educação Tecnológica Celso Suckow da Fonseca (CEFET/RJ), Rio de Janeiro, Brazil. Please see the book here:- https://doi.org/10.9734/bpi/cmsdi/v9/3757

 

The occurrence of carbon dioxide (CO2) in many industrial processes promotes massive corrosion by crevices and pitting in the carbon steel that makes up most industrial processing equipment. This study presents the properties of carbonic acid (H2CO3) and, consequently, the mechanisms of its corrosive action. The mechanisms by which corrosion inhibitors work to inhibit the corrosive process caused by CO2 in the vapor and liquid phases are presented. Commercial formulations used to inhibit carbon dioxide corrosion must meet a number of quality assurance criteria and/or specifications, including solubility, active matter content, volatility, foaming tendency, residues and deposits. Evaluation and monitoring of the inhibiting ability of commercial formulations should be determined based on laboratory, pilot and field tests using carbon steel or other metal or alloy coupons. Finally, the toxicity of active substances and solvents used in commercial corrosion inhibitor formulations must be evaluated for potential harm to humans and the environment.

 

 

Author(s) Details

 

Fernando B. Mainier

Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.

Renata Jogaib Mainier

Universo – Universidade Salgado de Oliveira, S. Gonçalo, Rio de Janeiro, Brazil.

Ailton Macedo Medeiros

Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.

Humberto Nogueira Farneze

Centro Federal de Educação Tecnológica Celso Suckow da Fonseca (CEFET/RJ), Rio de Janeiro, Brazil.

 

Please see the book here:- https://doi.org/10.9734/bpi/cmsdi/v9/3757

Corrosion Performance of UNS S41427 Supermartensitic Stainless Steel in Propargyl Alcohol Inhibited Hydrochloric Acid | Chapter 1 | Chemical and Materials Sciences: Developments and Innovations Vol. 9

 

The search for Oil and Gas has led to the exploration of wells at increasingly greater depths, which requires the materials used to possess specific characteristics to withstand severe conditions of temperature and pressure. In this context, the use of stainless steel has been growing compared to carbon steels, due to their superior resistance to corrosion. To address these limitations, a subclass known as super martensitic stainless steel has emerged. These steels exhibit superior corrosion resistance compared to martensitic steels, although, under certain conditions, they remain susceptible to corrosion, particularly pitting, generalized corrosion, intergranular corrosion, and stress corrosion in acidic environments containing sulfides. The objective of this study was to evaluate the behavior of the UNS S41427 super martensitic stainless steel in a solution of hydrochloric acid at 10% and 15%, at temperatures of 30 ºC, 45 ºC, and 60 ºC, over immersion times of 1 hour and 3 hours, and in concentrations of propargyl alcohol of 250 mg/L, 500 mg/L, and 1000 mg/L. The behavior of the material was also observed in the solution without the presence of the inhibitor. Gravimetric tests revealed that the corrosion rate increased with higher concentrations of HCl, temperature, and immersion time of the test specimen. Furthermore, the addition of propargyl alcohol resulted in a significant reduction in the corrosion rate under all analyzed conditions. The results indicated that the inhibitor's protection efficiency exceeded 80 - 90% in most experimental conditions, corroborating the initial expectations of the study.

 

Author(s) Details

 

Fernando B. Mainier

Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.

Renata Gomes Calisto

Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.

 

Please see the book here:- https://doi.org/10.9734/bpi/cmsdi/v9/3814

Determination of Gomphrena serrata Leaf Extract as Corrosion Inhibitor and Reductant for Synthesis of Copper Nanoparticles | Chapter 1 | Challenges and Advances in Chemical Science Vol. 5

In every field of study, adopting environmentally friendly approaches is a must. The potential of Gomphrena serrata leaves as a corrosion inhibitor for mild steel in HCl medium and as a reductant was investigated in this study. Electrochemical tests, SEM, and FTIR were used to determine the adsorbed layer on the metal surface, which revealed the corrosive inhibitive activity. G. serrata was discovered to be high in polyphenols, which have strong antioxidant properties and might be used as a reducing agent in the manufacture of metal nanoparticles, according to the phytochemical investigation. As an effective inhibitor, G. serrata follows the Langmuir adsorption isotherm and acts as an anodic type inhibitor. The Cdl and Rct values of the impedance analysis confirm the creation of a thin coating on the metal surface. Copper nanoparticles and their derivatives have been utilised to treat infections, leg ulcers, and other ailments. G. serrata leaves have therapeutic characteristics, thus they were used for the manufacture of copper nanoparticles to improve them. SPR bands at 345 nm (microwave method) and 341 nm (thermostat method) validated the CuNps production. The functional groups found in G. serrata are also seen in the FTIR spectra of CuNps, indicating that it was utilised as a reducing and capping agent.

Author (S) Details

S. Vidhya

PG and Research Department of Chemistry, Holy Cross College (Autonomous), Trichy-2, India.

A. Leema Rose

PG and Research Department of Chemistry, Holy Cross College (Autonomous), Trichy-2, India.

F. Janeeta Priya

PG and Research Department of Chemistry, Holy Cross College (Autonomous), Trichy-2, India.

View Book :- https://stm.bookpi.org/CACS-V5/article/view/3889