Saviour A. Umoren

• PhD FRSC
• Senior Research Scientist at King Fahd University of Petroleum and Minerals

This study investigated the efficacy of two fatty fractions (referred to as HF2 and HF5) obtained through chromatographic analysis of the n-hexane extract of the Saudi-origin plant Salsola imbricata in inhibiting corrosion of N80 steel in a 15% HCl solution, under both static and hydrodynamic conditions. The full identification of the phytochemical...

Research on Mg-based implants has increased recently because of their compatibility and biodegradability. Despite this promise, challenges related to high corrosion rates hampered wide-scale deployment. This paper explores the inhibiting properties of biomacromolecules, sodium alginate (ALG), hydroxyethyl cellulose (HEC), aspartame (ASP), and poly(...

This study focuses on determining the optimum conditions for the electrochemical generation of ferrates in concentrated NaOH solution. Various operating parameters, including electrolyte concentration, current density, temperature, electrolysis duration, and the composition and form of the anode, were investigated to enhance the yield of electroche...

Microbially influenced corrosion represents a critical challenge to the integrity and durability of carbon steel infrastructure, particularly in environments conducive to biofilm formation by nitrate-reducing bacteria (NRB). This study investigated the impact of NRB biofilms on biocorrosion processes within oil/water recovery operations in Algerian...

There has been substantial research focused on developing environmentally friendly materials to remove pollutants from wastewater. In this regard, a key study area is focused on green materials derived from plants and agricultural wastes. These materials have shown promising results in removing pollutants from water, providing a sustainable solutio...

Investigations of corrosion inhibition of ethanolic extract of Dillenia suffruticosa leaves as a green corrosion inhibitor of mild steel in hydrochloric acid medium, Corrosion Communications (2024), doi: https://doi. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) 1 HIGHLIGHTS  DSLE...

This work assesses potential of waste green chillies pedicles (GCP) in the prevention of Aluminium (Al) corrosion in 0.5 M NaCl. GCP is a natural bio-waste. The GCP has been extracted into ethanol (EACP) and characterized by FTIR spectroscopy (FS). The layers of EACP are deposited on Al through drop casting. The coated Al samples are tested by open...

Natural gums due to availability, multifunctionality, and nontoxicity are multifaceted in application. In corrosion inhibition applications, their performance, in unmodified form is unsatisfactory because of high hydration rate, solubility issues, algal and microbial contamination, as well as thermal instability. This work attempts to enhance the i...

Acidizing is a vital oil well stimulation exercise but must be done with an effective corrosion inhibitor to reduce corrosion risk. It is, however becoming increasingly difficult to find a corrosion inhibitor that is ecologically compatible and effective in strong acids and high temperatures. In this scientific communication, aspartame (ASP), sodiu...

A chitosan (CHT)–Ag nanocomposite was prepared using olive leaf extract (OLE) as the reducing and capping agent and AgNO3 as the precursor. Fourier transform infrared spectroscopy (FTIR), high-resolution transmission electron microscopy (TEM), field emission scanning electron microscopy, X-ray diffraction (XRD), ultraviolet-visible (UV–Vis) spectro...

A novel polymer, poly(N1,N1-diallyl-N6,N6,N6-tripropylhexane-1,6-diaminium chloride (PTPHDC) was synthesized and tested as corrosion inhibitor for API X60 steel in 15 wt.% HCl solution at 25°C−90°C using Weight loss, electrochemical impedance spectroscopy, linear polarization resistance, potentiodynamic polarization and surface assessments. Results...

The medicinal and aromatic plants are a source of bioactive molecules and mineral compounds used for therapeutic and agro-food purpose. This study aimed at the evaluation of the inhibitory enzyme effect of Ammodaucus leucotrichus Coss & Dur fruits essential oil, aqueous and ethanol extract against acetylcholinesterase, tyrosinase and α-glucosidase,...

Sustainable materials encompass a diverse range of substances used in both consumer and industrial domains. These materials are sourced in quantities that safeguard non-renewable resources and environmental equilibrium, with a focus on bio-based alternatives derived from plants. This study investigates the corrosion inhibition potential of two dist...

Sustainable materials encompass a diverse range of substances used in both consumer and industrial domains. These materials are sourced in quantities that safeguard non-renewable resources and environmental equilibrium, with a focus on bio-based alternatives derived from plants. This study investigates the corrosion inhibition potential of two dist...

Rumex vesicarius (RVE) mediated chitosan–AgNPs composite was produced in situ by using an aqueous extract of Rumex vesicarius leaves as the reducing agent to reduce Ag⁺ to Ag⁰. The synthesized composite was evaluated as a sweet (CO2) corrosion inhibitor (CI) for C1018 carbon steel (CS) in 3.5 wt% NaCl solution under static and hydrodynamic conditio...

The limiting factor towards the utilization of Mg and its alloys especially in aqueous environment is their low corrosion resistance occasioned by their high chemical reactivity and high electron negative potential. The corrosion inhibitor technology is one of the effective corrosion mitigation approaches. In this review, inorganic, organic (surfac...

Chitosan–copper oxide (CHT–CuO) nanocomposite was made by an in-situ method utilizing olive leaf extract (OLE) as reductant. The OLE mediated CHT–CuO nanocomposite containing varying amount of chitosan (0.5, 1.0 and 2.0 g) was evaluated as corrosion inhibitor for X60 carbon steel in 5 wt% hydrochloric acid solution. The corrosion inhibitive perform...

This work describes the first report of the known glycosidic constituents β-sitosterol-3-O-β-d-glucoside-6'-palmitate (1), β-sitosterol-3-O-β-d-glucoside (2), momor-cerebroside I (3), phytolacca cerebroside (4), 1,2-di-O-palmitoyl-3-O-(6-sulfoquinovopyranosyl)-glycerol (5), isorhamnetin-3-robinobioside (6), and isorhamnetin-3-rutinoside (7) from th...

Oil well acidizing, although a stimulation process, induces the corrosion of metallic equipment and well tubing. There is, at present, a high demand for effective and less toxic high-temperature corrosion inhibitors for the acidizing process due to the failing of the existing inhibitors at high temperatures occasioned by increases in the well depth...

Chitosan-copper oxide (CHT-CuO) nanocomposite was synthesized using olive leaf extract (OLE) as reducing agent and CuSO4⋅5H2O as precursor. CHT-CuO nanocomposite was prepared using an in situ method in which OLE was added to a solution of chitosan and CuSO4⋅5H2O mixture in the ratio of 1:5 (v/v) and heated at a temperature of 90 °C. The obtained CH...

The present work reports on the corrosion inhibition property of compounds isolated from butanolic extract of Date Palm leaves for low carbon steel in 15% HCl solution. Six compounds were isolated from Date Palm leaves and purified using a combination of column chromatography, thin layer chromatography, and Prep HPLC-MS system. The isolated compoun...

Conductive polymers are organic polymers that conduct electricity. They may have metallic conductivity or can be semiconductors. At present, there is growing interest in the utilization of conducting polymers (CPs) for protection against metal corrosion. The combination of the properties of the classical metals, semiconductors, and polymers make CP...

This chapter discusses in detail the corrosion inhibition characteristics of polyaspartic acid (PASP) and poly(vinylpyridine). Aspartic acid has three pKa values and can exist in any one of four charges: +1, 0, –1, or –2, depending on the pH of the solution. The multiple acid-base equilibria have an effect on the corrosion inhibiting property of as...

The application of pectin, a high-molecular-weight heteropolymer with a preponderance of galacturonic acid units as metals corrosion inhibitor is discussed in this chapter. The chapter begins by discussing the classes, sources, preparation, and the general properties of pectin. Pectin is a promising green metals corrosion inhibitor. However, its in...

Gums are water-soluble materials and organic nonstarch polysaccharides that have found wide use in industrial applications mostly because of their nontoxic nature. They have demonstrated good corrosion inhibition ability for various substrates in diverse corrosive environments. This chapter takes a look at the corrosion inhibition performance of gu...

Polyethers are a class of polymers that are characterized by the —O— connection. They can be either aliphatic or aromatic, and the common members are polyethylene oxide (PEO), polypropylene oxide (PPO), and polytetrahydrofuran. PEO and PPO are the polyethers with information on their anticorrosion property. This chapter discusses their performance...

Polyols are viscous liquids or waxy solids, depending on the molecular weight and hydroxyl content, with superior lubricity and solvency properties. Polyethylene glycol (PEG) and polypropylene glycol (PPG) are two polyols the corrosion inhibitive abilities of which have been extensively studied. This chapter begins by discussing the chemistries of...

Copolymerization is a chemical modification technique that is adopted to overcome certain weaknesses of polymers as metal corrosion inhibitors and to enhance their inhibition performance. The chapter begins with the fundamentals of copolymers, considering the different classes of copolymers, such as the random copolymers, the alternating copolymers...

Acrylic is a generic term denoting a derivative of acrylic and methacrylic acid, including acrylic esters and compounds containing nitrile and amide groups. Three types of acrylic polymers have been extensively studied for their corrosion inhibition properties: polyacrylic acid (PAA), polymethacrylic acid (PMMA), and polyacrylamide. The synthesis o...

The anticorrosion properties of three natural polymers, namely, gelatin, dextrin, and dextran, are discussed in this chapter. The chapter begins by providing background information on each of the polymers, including their synthesis, properties, and applications. Since a single compound rarely provides the needed inhibition performance, the various...

Inhibition of wet metal corrosion by organic-based inhibitors occurs by an adsorption mechanism, which is the gradual replacement of adsorbed water molecules on a metal surface by inhibitor molecules as a result of the interaction between the metal surface and inhibitor molecules. Macromolecules such as polymers can be adsorbed on a metal surface t...

This chapter briefly highlights the basic concept of polymeric materials. It covers basic concepts such as definition, classification, general properties, polymerization reactions and their kinetics, and polymerization systems.

Chitosan is a biopolymer that is derived from chitin. It has attracted significant, scientific and industrial interest, owing to its peculiar macromolecular structure, biocompatibility, biodegradability, and other intrinsic functional properties. At a commercial scale, chitosan is obtained by deacetylation of its parent polymer chitin. This chapter...

Corrosion, which is commonly defined as the deterioration of a material (usually a metal) or its properties because of a reaction with its environment, is a global problem. NACE International, the Corrosion Society, estimates that global corrosion and its consequences cost developed nations about 3%–5% of GDP or GNP. Methods that are commonly emplo...

Starch is an attractive raw material in the pharmaceuticals, paper-making, textile, and food preparation industries because of its renewability, biodegradability, and affordability. It is also useful in the oil and gas industries, mostly as additive in drilling muds. This chapter begins by highlighting the preparation of starch and the physical and...

Resins are viscous compounds that cure into stiff polymers and contain reactive end groups, such as acrylates or epoxides. The presence of these polar functional groups confers corrosion-inhibiting characteristics. This chapter looks at the performance of different types of polymer resins as corrosion inhibitors. The epoxy resins are widely studied...

Chitosan as a single compound can barely achieve the desired anticorrosion effect. Chemical modifications, such as functionalization, copolymerization, and grafting, can enhance chitosan’s corrosion inhibition performance. This chapter takes a look at the synthesis of chitosan derivatives and the inhibitive performance of the derivatives in compari...

Vinyl polymers are polymers made from vinyl monomers. In relation to corrosion inhibition applications the most important vinyl polymers are polyvinyl alcohol (PVA) and polyvinyl pyrrolidone (PVP). PVA is a water-soluble synthetic polymer. Depending on the hydrolysis conditions, PVA could be fully hydrolyzed or partially hydrolyzed. PVP or povidone...

Alginate is an anionic and hydrophilic polysaccharide. It is one of the most important biosynthesized natural materials and is derived primarily from two sources: marine plants and bacteria. Some physical and chemical properties of alginates are highlighted in this chapter. Alginates have gained application as metals corrosion inhibitor because of...

This chapter highlights the fundamentals of corrosion inhibition, covering the definition of corrosion inhibitors, different classes of corrosion inhibitors, factors affecting the effectiveness of corrosion inhibitors, and different techniques employed to determine corrosion rate and inhibitor efficiency as well as surface analysis approaches adopt...

Cellulose is an organic molecule and a linear polysaccharide. Cellulose ethers, which are derived by the substitution of the hydrogen atoms of the hydroxyl groups with alkyl groups, are the most promising as corrosion inhibitors. The most investigated as metal corrosion inhibitors are carboxymethyl cellulose, methyl cellulose, ethyl cellulose, hydr...

This chapter discusses in detail the corrosion inhibition characteristics of polyamide and polyethyleneimine. The synthesis steps of these polymers are given. Other synthetic polymers, such as polyvinyl acetate, polyoxazoline, poly(aminoquinoline), and poly(cyanurateamine), are also considered in this chapter.

This chapter comprehensively considers the corrosion inhibition performance of carrageenan, tragacanth gum, Acacia sieberiana, Khaya senegalensis, Albizia ferruginea, Albizia zygia, Anogeissus leiocarpus gum, Canarium schweinfurthii, Pachylobus edulis exudate gum, Raphia hookeri, Commiphora kestingii gum, Commiphora pedunculata, Daniellia oliveri g...

Dendrimers are a special class of polymers with exciting characteristics, such as high solubility and viscosity, nanosize dimension, monodispersity, compact and globular structure, as well as multiple adsorption centers. They are classified based on shape, end functional groups, and internal cavities into simple, liquid crystalline, chiral, micella...

This chapter discusses the basic concepts of polymeric materials. It covers molecular weight and molecular weight distribution, the concept of copolymerization, and the application of polymers in packaging, as scale inhibitors, in the biomedical field, as adsorbents, and in enhancing oil recovery.

Polymeric Materials in Corrosion Inhibition: Fundamentals and Applications brings together the very latest information and techniques in the preparation and application of a broad range of polymeric materials as corrosion inhibitors in diverse corrosive environments. Sections introduce the fundamentals of polymeric materials, corrosion and corrosio...

environmentally friendly corrosion inhibitor for ferrous and non ferrous alloys subject to descaling operation.

Date palm leaves (DPL) was extracted using acetone (ACE), ethanol (ETH), aqueous (AE), butanol (BUT), methanol (METH), isopropanol (ISO), and ethyl acetate (EHY ACT). The extracts were characterized using Fourier-transform infrared spectroscopy (FTIR) and ultraviolet-visible (UV-vis) spectroscopy. The various solvent DPL extracts were screened for...

The phytochemical analysis of the butanolic extract from the leaves of date palm of Saudi origin resulted in the isolation of three major constituents, oleanolic acid (1), vanillyl alcohol (2), and β-sitosterol-3-O-β-d-glucoside (3), which had not been isolated from this plant or previously reported. Together, compounds 1 and 2 account for 1.0% of...

The quest to replace toxic chemicals in the nearest future is revolutionizing the corrosion inhibitor research world by turning its attention to plant biomaterials. Herein, we report the corrosion inhibiting potential of butanolic extract of date palm leaves (BUT) on the corrosion of API 5L X60 carbon steel in 15 wt.% HCl solution. The mass loss, e...

A green and cost-effective inhibitor based on Date palm leaves extract was formulated for use during acid cleaning of thermal desalination plants. The inhibitor formulation designated as F1 was tested against the corrosion of ferrous-based alloys namely: carbon steel, Ni-resist, and 316L stainless steel in 2% HCl solution at 40 °C under static and...

N¹,N¹-diallyl-N⁶,N⁶,N⁶-tripropylhexane-1,6-diaminium chloride (NDTHDC) and its polymer poly(N¹,N¹-diallyl-N⁶,N⁶,N⁶-tripropylhexane-1,6-diaminium chloride) (poly-NDTHDC) were synthesized and tested against API X60 carbon steel corrosion in 15 wt % HCl solution. Weight loss, electrochemical, and surface analysis techniques were used. Results show tha...

In this study, Kola nut extract (KE) was evaluated for inhibiting ability towards low carbon steel corrosion in 1 M HCl solution using weight loss and electrochemical techniques. The surface of the corroded carbon steel was examined by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and atomic force microscopy (A...

The present invention relates to a method of inhibiting corrosion of steel in contact with a corrosive solution. The method involves mixing an olive leaf extract titanium nanocomposite with the corrosive solution. The olive leaf extract titanium nanocomposite may be made by reducing TiCl4 with olive leaf extract, which form nanoparticles with an av...

Due to strict environmental regulations, the use of toxic chemicals as corrosion inhibitors for the oil-well acidizing is restricted. Environmentally benign Vanillin-modified chitosan (Van-Cht) is synthesized using a microwave-induced green synthetic protocol and thoroughly characterized by FTIR and NMR spectroscopy. The inhibitor has been evaluate...

Being a natural and renewable polysaccharide, pectin (PC) is considered a polymer with promising potential for many applications. In the present investigation, novel multifunctional pectin/polypyrrole (PC/PPy) composite coatings loaded with gentamicin (GM) were electrochemically deposited on TiNbZr alloy to enhance its biocompatibility, antibacteri...

Lower-grade steel materials are the most commonly used construction materials for oil and gas wells due to their low cost and high performance. However, they are susceptible to corrosion when they come in contact with corrosive environments that are highly acidic. In oil wells, particularly deep oil wells, hydrogen sulphide (H2S) is commonly found....

Over the years, the oil and gas industries have been bedridden with the problem of metallic structure's corrosion. The consequences of corrosion are enormous, ranging from financial to life lost. The use of corrosion inhibitors is, perhaps, the most cost‐effective approach. Inorganic particularly chromate‐rich inhibitors have been very effective in...

Chitosan/silver nanofluids were prepared using Phoenix dactylifera (DPLE) or Rumex vesicarius (HEL) extracts as the reducing agent, characterized using Fourier-transform infrared spectroscopy (FTIR), ultraviolet–visible (UV-vis), X-ray diffraction (XRD), and transmission electron microscope (TEM). The antimicrobial effect of the nanofluids against...

The addition of chemical additives has been considered as a standard operation in water treatment systems. This chapter discusses the chemical additives used for the control of corrosion in desalination systems. Specifically, corrosion inhibitors for various metallurgies, biocides, and oxygen scavengers are covered. The pros and cons of the additiv...

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

https://onlinelibrary.wiley.com/doi/book/10.1002/9783527822140

Seven natural polymers namely, chitosan (CHI), dextran (Dex), carboxymethyl cellulose (CMC), sodium alginate (ALG), pectin (PEC), hydroxylethyl cellulose (HEC), and Gum Arabic (GA) were screened for anticorrosion property towards AZ31 Mg alloy in 3.5 wt.% NaCl solution. CHI, Dex, CMC, PEC, and GA accelerated the corrosion while ALG and HEC moderate...

An imidazoline, 2-heptadecyl-1-[2-(octadecanoylamino)ethyl]-2- imidazoline (QSI) with -C17H35 as the tail chain length was synthesized, characterized, and studied as corrosion inhibitor for low carbon steel in 15% HCl solution under static and hydrodynamic conditions. Influence of addition of KI, temperature, and chain length of pendant hydrocarbon...

A benzimidazole derivative, 2-(2-bromophenyl)-1-methyl-1H-benzimidazole (2BPB) has been studied as a corrosion inhibitor for Cu-Ni 70/30 and 90/10 alloys in 1 mol/dm3 at low and high temperatures using the weight loss, electrochemical (potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), & cyclic voltammetry (CV)), and...

The potential of an environmentally friendly novel synthesized and characterized isoxazoli-dine derivative namely 5-(4-dodecyloxy-3-methoxybenzyl)-2-methylisoxazolidine (DMBMI)as anticorrosion agent for carbon steel in 1 mol/L HCl solution was investigated using gravimetric and electrochemical techniques. Kinetics parameters of the corrosion proces...

Metallic pipelines and gathering tanks play a vital role during oil and gas exploration, production, transmission, and processing. These facilities are usually attacked by corrosion. The use of corrosion inhibitors is one of the most economical and reliable approaches to control the corrosion of oil and gas metallic facilities. This paper looks at...

There is a high demand of effective and eco-friendly corrosion inhibitor for industrial applications. In an attempt to prepare a benign and effective corrosion inhibitor for acidizing purpose, an imidazoline derivative, N-(2-(2-tridecyl-4,5-dihydro-1H-imidazol-1 yl)ethyl)tetradecanamide (NTETD) was synthesized from myristic acid and diethyleneamin...

Plant biomaterials as inexpensive, nontoxic, biodegradable materials are found abundantly in nature.They contain heteroatoms and/or pi electrons that make them candidate for metals corrosion inhibitor. In recent years, numerous research works have been undertaken on plant biomaterials as metals corrosion inhibitor in different corrosive media. This...

Corrosion defined as the deterioration of a material when it interacts with its environment is a global problem. Among the different strategies employed to combat corrosion, the use of coatings and corrosion inhibitors are the most popular. Coatings or corrosion inhibitors form a layer over the metallic substrate and protect it against corrosion.Po...

Cyclodextrin-based functionalized Graphene Oxide (CD-GO), was synthesized utilizing cost-effective waste graphite as a source for production of graphene. The obtained novel material, CD-GO, was characterized and evaluated for corrosion inhibition of X60 carbon steels in solutions of HCl at room temperature. The inhibition efficacy of the CD-GO mate...

A novel random copolymer 4, containing diallylmethylamine and N1,N1-diallyl-N1-methyl-N6,N6,N6-tripropylhexane-1,6-diammonium dibromide units in a 1:1 ratio (polymer 4) was synthesized via Butler’s cyclopolymerization technique. Characterization was accomplished by 1H NMR, elemental analysis, and Fourier-transform infrared spectroscopy (FTIR). Poly...

The ability to analyze different electrochemical corrosion phenomena, in–situ, without requiring any form of electrode perturbation has strongly attracted the attention of corrosion researchers towards the application of electrochemical noise (EN) analysis method. With the ability to analyze stochastic and chaotic electrode potential and current fl...

The corrosion inhibition efficiency of 2-Thiobarbituric acid (TBA) for metal substrate (API X60 steel) in 3.5% NaCl solution saturated with CO2 gas was probed using various techniques namely, LPR (linear polarization resistance), EIS (electrochemical impedance spectroscopy), and PDP (potentiodynamic polarization). The effects of TBA concentration (...

Investigation into amitriptyline (AMI) as a corrosion inhibitor for different grades of pipeline steels (X80, J55 and mild steel) was undertaken under static conditions in 3.7% and 15% HCl solution and temperature ranging from 30 to 90 °C using electrochemical, gravimetric, and surface screening approaches. AMI is adjudged an effective steel corros...

The inhibitive efficacy of environmental friendly pyrazine derivatives, 2,3-pyrazine dicarboxylic acid (Pyrazine C), pyrazine carboxamide (Pyrazine E) and 2-methoxy-3-(1-methylpropyl) pyrazine (Pyrazine H), on X60 steel were investigated in 15% hydrochloric acid (HCl), which simulate oil well acidizing conditions. The inhibitors were examined for t...

A novel palmitic imidazoline compound, N-(2-(2-pentadecyl-4,5-dihydro-1H-imidazol-1-yl)ethyl)palmitamide (NIMP) has been successfully synthesized and characterized with Fourier transform spectroscopy (FTIR), Proton nuclear magnetic resonance (1H NMR), and Carbon-13 nuclear magnetic resonance (13C NMR). NIMP has been tested as corrosion inhibitor fo...

A novel tetrapolymer (TP) consisting of carboxylate, sulphonate, phosphonate and sulfur dioxide based co-monomers was synthesized using Butler cyclopoymerization technique. The synthesized tetrapolymer was characterized using FTIR, ¹H-NMR, ¹³C NMR and elemental analysis. The performance of the tetrapolymer as a corrosion inhibitor for St37 carbon s...

The possibility of utilizing dextran as a green corrosion inhibitor for steel in strong acid environment was explore using weight loss, electrochemical (electrochemical impedance spectroscopy (EIS), electrochemical frequency modulation (EFM), potentiodynamic polarization (PDP), and linear polarization (LPR)) supported with surface analysis via scan...

The study was aimed at establishing the possibility of using eco-friendly natural polymers to formulate corrosion inhibitors for sweet oil field environment. Against this background, the performance of two natural polymers; chitosan and carboxymethyl cellulose (CMC) as single component corrosion inhibitors in comparison with a commercial inhibitor...