Corrosion
Browse 60 curated documents about corrosion in The Archive — the 2RA-Edition digital library for engineering and scientific research. This collection of books, journal articles, theses, reports, and technical documents on corrosion spans extractive metallurgy, mining engineering, chemistry, and applied science. Every document is searchable in full text; sign in to read, download, ask AI questions about any document, or generate cited research drafts with the AI Researcher.
Insights into the Adsorption Mechanism and Corrosion Protection of Phytic Acid Conversion Coatings on Fe, Cu, and Al Surfaces: A Combined Theoretical and Experimental Study
Min Guan, Xiaoting Wang
This study explores the surface interaction mechanism of phytic acid (PA) on Fe, Cu, and Al metals and its applicability in green anticorrosion surface treatment through a combination of quantum chemical calculations, molecular dynamics (MD) simulations, and electrochemical measurements. Quantum chemical calculations identified the nucleophilic/electrophilic active sites of PA via HOMO-LUMO and Fu
ELECTROCHEMISTRY AND MINERAL DISSOLUTION
Fathi Habashi, Ahmet Deniz Bas
The process of leaching semiconducting minerals such as PbS and ZnS has garnered significant attention from hydrometallurgy researchers since the early 1950s, leading to speculation about the formation of intermediate surface complexes that could not be identified through traditional physicochemical techniques. The introduction of electrochemical theory in the late 1960s compared the leaching proc
Revealing the Atomic-Scale Structure of the Copper–Sulfuric Acid Interface
Lalith Kumar Bhaskara, Sung-Gyu Kang
Corrosion originates from atomistic reactions occurring at dynamic solid-liquid interfaces; however, direct experimental observation of these reactions has remained elusive due to the inability to preserve transient interfacial states during characterization. To refine corrosion models, advanced techniques capable of analyzing corrosion interfaces at the atomic scale are essential. Recent advancem
Investigation of alumina formed by plasma electrolytic saturation
Seyad Mohammad Mousavi Khoie, Mohammad Falaki
The process of alumina coating on steel surfaces using plasma electrolytic methods aims to enhance corrosion resistance through the application of electrolytic aluminum-containing compounds. This study investigates the characteristics of coatings formed and their performance. Employing a systematic methodology, the results indicate the formation of a micron-sized coating with a distinct cauliflowe
Development of an automated millifluidic platform and data-analysis pipeline for rapid electrochemical corrosion measurements: a pH study on Zn-Ni
Howie Joress, Brian DeCost
We describe the development of a millifluidic based scanning droplet cell platform for rapid and automated corrosion. This system allows for measurement of corrosion properties (e.g., open circuit potential, corrosion current through Tafel and linear polarization resistance measurements, and cyclic voltammograms) on a localized section of a planar sample. Our system is highly automated and flexible,
Carbon nanotube/metal corrosion issues for nanotube coatings and inclusions in a matrix
Farhad Daneshvar
Corrosion is an inevitable phenomenon that is inherent in metals and even though there has been significant research on this subject, no ideal protection has been discovered to fully prevent corrosion. However, methods such as using protective coatings, and modifying the structure or composition of the material have been used to slow down gradual corrosion and fortunately they proved to be quite b
EFFECT OF HEAT TREATMENT ON CORROSION BEHAVIOR OF SS316
MOHD ASYRAF BIN CHE AZMI
This study investigates the effect of heat treatment on the corrosion behavior of SS316 stainless steel in a simulated body environment. The objective is to evaluate how different heat treatment processes can influence the resistance of SS316 to corrosion when subjected to conditions that mimic those found in biological systems. A systematic methodology was followed, involving the preparation of s
Enhancing Ni–B Coatings on 42CrMo4 Steel: Effects of Magnetic Stirring and Ultrasonic Agitation on Microstructure and Corrosion Performance
SU¨MRAN BILGIN, SAMET TOPAL
This study explores the development of electroless nickel–boron (Ni–B) coatings on AISI4140 steel using sodium borohydride as a reducing agent, employing ultrasonic agitation and magnetic stirring. Electroless plating is preferred for its cost-effectiveness and ability to coat complex geometries. The Ni–B coated on 42CrMo4 steel was characterized by X-ray diffraction (XRD), scanning electron micro
2003 Luis Felipe Verdeja Gonzalez Corrosion Mechanism and Wear Prediction of the Sole of an Electric Arc Furnace isijinternational.43.192
Luis Felipe VERDEJA, Roberto PARRA
The study addresses the corrosion problems associated with electric arc furnaces, a major concern in metallurgical processes. The objective of this research is to systematically analyze the corrosion mechanisms of refractory and ceramic materials in contact with various corrosive fluids such as metals, mattes, and slags, through the development of the Nodal Wear Model (NWM). Initially conceived fo
Effect of Aqueous Antimony Species on Corrosion of PbSnCa Alloy in Copper Electrowinning
Hidehiro Sekimoto, Sou Sugawara
Copper electrowinning is a crucial process for producing primary copper from copper oxide minerals and for recycling copper through smelting, leaching, and electrowinning. This study investigates the effect of aqueous antimony species on the corrosion of a PbSnCa alloy in copper electrowinning using galvanostatic electrolysis, X-ray diffractometry, scanning electron microscopy-energy dispersive
Electrochemical Behavior of Carbon Steel ASTM A36 in Diluted Pregnant Leach Solutions from Electrowinning of Copper
Luis Cáceres, Alvaro Soliz
In Northern Chile, large amounts of highly corrosive solutions are currently generated in the process of cathode washing after completing the electrowinning or electrorefining process of copper. This study investigates the electrochemical behavior of ASTM A36 carbon steel in pregnant-leach-solution (PLS) wash water. Measurements of electrochemical impedance spectroscopy and linear sweep voltammetr
Corrosion Mitigation in Molten Salt Environments
Sylvie Delpech, Charly Carrière
The aim of this paper is to present methods for corrosion mitigation in molten salt environments. The corrosion of structural materials depends directly on the redox potential of the salt. When the redox potential of the salt is higher than the standard potentials of the elements constituting the structural materials, corrosion occurs. If the reverse is true, no corrosion is observed. Herein, a me
Microstructural and electrochemical behavior of 2205 duplex stainless steel weldments
M. Atif Makhdoom, A. Ahmad
The paper describes the joining of rolled plates of 2205 Duplex stainless steel (DSS) by Gas tungsten arc welding (GTAW) and shielded metal arc welding (SMAW). The development of different phases upon welding without any post heat-treatment– especially in the heat affected zone (HAZ)– and their consequent different corrosion resistance were investigated through optical microscopy, scanning electro
ON THE EFFECTIVENESS OF DUPLEX STAINLESS STEEL CLADDING DEPOSITED BY GAS METAL ARC WELDING
Anup Kumar Verma, Bidhan Chandra Biswas
Parts of a mechanical system or structure operating, or located, in corrosive environments get corroded gradually, leading to premature failure and increased servicing costs. Metal cladding is an economical solution widely used to protect components from these detrimental effects. This experimental investigation employs duplex stainless steel for cladding using the gas metal arc welding (GMAW) pro
Microstructure and Corrosion Resistance in Bimetal Materials of Q345 and 308 Steel Wire-Arc Additive Manufacturing
Qingxian Hu, Xiaoli Wang
The microstructure and corrosion resistance of samples fabricated by Q345 and 308 bimetallic feedings using two kinds of processes of wire-arc additive manufacturing (WAAM) was observed and compared with that of sample manufactured by a single feeding wire of Q345 or 308. The results show that the interface between the Q345 and 308 had no defects and metallurgical bonding. The hardness of bimetal
Effects of Additive Manufacturing on the Mechanical and Corrosion Properties of Austenic Stainless Steel
János Endre MAróTi, Dávid Miklós KEMény
Additive manufacturing (AM) offers the possibility to produce complex parts without the design constraints of traditional manufacturing routes. Our aim was to determine different mechanical and corrosion properties of direct metal laser sintered austenitic stainless steel (X2CrniMo17-12-2) material using tensile test, Charpy impact test, scanning electron microscopy, and corrosion test. The measur
Effect of heat treatment on the microstructure and corrosion properties of cast duplex stainless steels
Aleksandr Fedorov, Andrey Zhitenev
The effect of the quenching temperature on the pitting corrosion resistance of lean duplex stainless steel (DSS) was examined. Using thermodynamic modeling of phase formation processes in steel during solidification and subsequent cooling, it was shown that an equal amount of austenite and ferrite is achieved at 1210ºC for the examined composition. Experimental steel samples were quenched from 110
Analysis of Super Duplex Stainless Steel Properties as an Austenite-Ferrite Composite
Fady M. Elsabbagh, Ahmed El-Sabbagh
Super duplex stainless steel (SDSS) is regarded as a composite formed from a microstructure containing approximately equal mixtures of two primary constituents, namely γ-austenite and α-ferrite phases, along with secondary precipitates such as sigma and chi. This study aims to investigate the relationship between toughness and corrosion behavior of SDSS (UNS 32760) relative to its microstructure c
WELDING RESEARCH
BALÁZS VARBAI, KORNÉL MÁJLINGER
This study focuses on the impact of nitrogen on the properties of duplex stainless steels (DSSs), specifically examining its role in enhancing strength and resistance to stress corrosion cracking. The objective is to quantify the austenite stabilizing effect of nitrogen during welding processes. A methodological review of existing literature and welding practices is conducted to assess nitrogen's
THE EFFECT OF COOLING RATE ON THE MECHANICAL AND CORROSION PROPERTIES OF SAF 2205 (UNS 31803) DUPLEX STAINLESS STEEL WELDS
J.D. Kordatos, G. Fourlaris
The welding of duplex stainless steels, specifically SAF 2205, presents challenges in achieving a balanced microstructure consisting of both ferrite and austenite phases. This study aims to investigate the impact of cooling rate on the mechanical and corrosion properties of SAF 2205 duplex stainless steel weldments. An experimental procedure was employed using eight 40 cm weldments prepared throug
Microstructure and Corrosion Properties
Xiaoli Wang, Qingxian Hu
Because low thermal conductivity and high viscosity are common characteristics of austenitic steel, it is easy to cause a large amount of heat accumulation in the chip area, resulting in tool edge collapse or wear, and the traditional preparation method is unsuitable for preparing large and complex austenitic steel components. Wire + arc additive manufacturing (WAAM) provides great application val
Effect of Mo addition on corrosion of Zn
Honorata Kazimierczak, Jerzy Morgiel
ZnMo coatings with Mo content from 0.5 to 6 wt.% were electrodeposited on steel from citrate electrolytes. Electrochemical studies of their corrosion behaviour performed in a 5 wt.% NaCl showed that the low Mo content (∼0.5–1.5 wt.%) enhances corrosion protection significantly, whilst higher contents barely improve the corrosion properties in comparison to pure zinc coatings. Microstructural and p
Corrosion resistance of Zi-Ni coatings exposured to neutral salt spray
Julian Kubisztal, Jolanta Niedbała
Zn-Ni coatings (c.a. 30 wt.% Ni) were deposited under galvanostatic conditions on a carbon steel substrate (St3S) from an ammonia bath. The corrosion resistance of these coatings was assessed using an accelerated test (NSS – neutral salt spray) in accordance with ISO 9227:2007. To compare the corrosion properties of the as-deposited Zn-Ni coating, Zn-Ni coatings after exposure to the NSS environme
Comparative Evaluation of Chemical Deposition Parameters of an Induced Zn/Al-Zn and their Interfacial Characteristic Trend on Mild Steel
O.S.I. Fayomi, A.P.I. Popoola
A statistical study and matlab evaluation has been conducted on the deposited Zn/Zn-Al alloy on mild steel. The objective was to achieve improved surface adherence by utilizing an electroplating technique with developed zinc and aluminum powder particles. The study employed scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) to investigate the morphological adhesion p
Zn-rich Coatings Revisited
Gordon Bierwagen, Kerry Allahar
To improve understanding of Zn-rich coatings for use in Army Vehicles, such coatings are being examined in this laboratory by the suite of testing techniques that were utilized in our recent development of Mg-rich coatings for the Cr-free protection of Al alloys. These testing techniques are being used in conjunction with a modeling and characterization effort focused on improving the understandin
Zn-Ni ALLOY COATINGS FROM ALKALINE BATH CONTAINING TRIETHANOLAMINE. INFLUENCE OF ADDITIVES.
Liana Maria Muresan, Julien Eymard
The study investigates the electrodeposition of Zn-Ni alloys from an alkaline bath using triethanolamine as a complexing agent for Ni2+ ions. Various brightening agents including polyethylene glycol (PEG), coumarin, piperonal, and vanillin were tested to evaluate their effects on the codeposition process and the corrosion resistance of the resulting coatings. The findings indicate that the electro
Zinc-nickel coatings: relationship between additives and deposit properties
R. ALBALAT, E. GOMEZ
This study explores the electroplating of zinc-nickel alloys from a chloride bath incorporating two brighteners and a leveling agent under varying conditions. The primary objective is to investigate the relationship between the additives' concentration and the resulting deposit morphology and properties. Methodologically, scanning electron microscopy was employed to classify deposit morphologies,
THE MICROSTRUCTUf{E OF ELE(TrRODEPOSITEI) Zn-Ni COATINGS
PouI Lenvig Hansen, Claus Qvist
Electrodeposited Zn-Ni coatings (10-15 wt% Ni) serve as effective alternatives to cadmium coatings for corrosion protection of steel. The objective of this study was to investigate the microstructure of Zn-Ni coatings with 10-14 wt% Ni through advanced techniques. We utilized transmission electron microscopy (TEM) combined with Debye-Scherrer X-ray diffraction (XRD) to analyze the coating microstr
THE ELECTRODEPOSITION AND PROPERTIES OF Zn–Ni + Ni COMPOSITE COATINGS
P. Ganesan, S.P. Kumaraguru
Interest in Zn–Ni alloys stems from their effective protective properties for steel construction materials. However, the anomalous deposition of these alloys leads to an increased zinc content in Zn–Ni coatings, which can adversely affect corrosion resistance in aggressive environments. This study aimed to enhance the nickel content in Zn–Ni coatings by incorporating nickel powder into the galvani
The influence of anion type in electrolyte on the properties of electrodeposited Zn-Mn alloy coatings
M. Bučko, J. Rogan
Zn-Mn alloy electrodeposition on steel electrode, in electrolytes containing chloride or sulfate anions, was investigated by chronopotentiometry. Galvanostatically obtained electrodeposits were characterized by X-ray diffraction (XRD), atomic force microscopy (AFM), and atomic absorption spectrophotometry (AAS). It was found that Zn2+ and Mn2+ ion reduction occurred at higher overpotentials in sul
Tailoring the corrosion resistance of Zn-Mn coating by electrodeposition from deep eutectic solvents
Mihael Bučko, Sanja I. Stevanović
Well adhered, homogenous coatings were obtained from deep eutectic solvents (DES) based on choline chloride and urea, at current densities up to 20 mA cm -2. The coatings’ morphology was analyzed by atomic force microscopy, determining the agglomerates size and distribution. The corrosion stability of these deposits was analyzed in 3 wt. % NaCl solution by electrochemical impedance spectroscopy an
Surface base effects on zinc coating characteristics
Desimir Jovanović, Bogdan NEDIĆ
Galvanic zinc coating applied in addition to perform appropriate performances of the base material surface such as corrosion resistance, chemical stability, required aesthetic impression etc. Galvanic zinc coating examinations are focused mostly on Zn connection with the base material, while we have poor data about the influence of the surface on the characteristics of the coating. Previous final
Influence of structural factor on corrosion rate of functional Zn–Ni coatings
E. Beltowska-Lehman, P. Ozga
This study investigates the electrocrystallization processes of zinc-nickel (Zn–Ni) coatings from weakly acidic sulfate solutions enriched with citrate and acetate complexing agents. The primary objective was to compare the deposition kinetics and analyze the impact of different electrolyte compositions on the physicochemical properties of the coatings, particularly focusing on corrosion resistanc
Influence of Ni 2+ concentration and deposition potential on the characterization of thin electrodeposited Zn–Ni–Co coatings
Mortaga M. Abou-Krisha
The electrodeposition of Zn–Ni–Co alloys from sulphate electrolytes was studied on steel rod. In order to elucidate the characteristics of the layer formation, a complementary approach was used based on the combination of various electrochemical techniques. The cyclic voltammetry and galvanostatic techniques for electrodeposition, while potentiodynamic polarization resistance and anodic linear swe
Influence of formic acid on the microstructure and corrosion resistance of Zn–Ni alloy coatings by electrodeposition
G.A.G. Pedroza, C.A.C. de Souza
In this study the effect on the deposition efficiency and corrosion resistance of Zn–Ni electrodeposits after the addition of formic acid (0.03 to 0.53 mol/L) to the plating bath is investigated. The corrosion resistance was evaluated in an aerated solution of 2.0 mol/L NaOH and 0.5 mol/L NaCl using weight loss tests and electrochemical measurements, including potentiodynamic polarization curves a
Electrodeposition of Zn–Ni coatings as Cd replacement for corrosion protection of high strength steel
A. Conde, M.A. Arenas
Electrodeposition of Zn–Ni coatings performed in acidic baths are not suitable for high strength steels due to their high susceptibility to hydrogen embrittlement. In this work, Zn–Ni coatings were deposited on a high strength steel (4340) upon stirring conditions from an alkaline bath. A complete characterisation of the coatings (corrosion, morphology and composition) has been accomplished, corre
Effect of pH Values on the Characterization of Electrodeposited Zn–Mn Coatings in Chloride-Based Acidic Environment
Metin Bedir, Derya Korkmaz
This study investigates the effect of processing pH on the structure and corrosion resistance of Zn-Mn coatings deposited on AISI 4140 high tensile steel using a potentiostatic technique in chlorine-based sulfate baths at a constant potential of -2 V. Various characterization methods, including X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (E
Effect of Ni Concentration on the Surface Morphology and Corrosion Behavior of Zn-Ni Alloy Coatings
Ameeq Farooq, Sohaib Ahmad
This research work aims to develop electrodeposited Zn-Ni alloy coatings with controlled dissolution tendencies on a mild steel substrate. The varying Ni concentration in the electroplating bath, i.e., 10, 15, 20 and 25 g ·L−1, affected the surface morphology and electrochemical properties of the deposited Zn-Ni alloy coatings. SEM and EDS analysis revealed the resulting variation in surface morph
Effect of Mo addition on corrosion of Zn coatings electrodeposited on steel
Honorata Kazimierczak, Jerzy Morgiel
ZnMo coatings with Mo content from 0.5 to 6 wt.% were electrodeposited on steel from citrate electrolytes. Electrochemical studies of their corrosion behaviour performed in a 5 wt.% NaCl showed that the low Mo content (∼0.5–1.5 wt.%) enhances corrosion protection significantly, whilst higher contents barely improve the corrosion properties in comparison to pure zinc coatings. Microstructural and p
Evaluation of Formic Acid and Cyclohexylamine as Additives in Electrodeposition of Zn Coating
Carolina da Silva Lopes, Paulo Moura de Santana
The Zn coatings obtained through electrodeposition are used to protect steel substrates from corrosion. In general, organic additives are added to the deposition bath in order to improve deposition characteristics such as corrosion resistance, hardness and deposition efficiency. Despite the literature presenting various organic additives' effects on Zn coating properties, there is no analysis of c
Nickel coating on high strength low alloy steel by pulse current deposition
S Nigam, S K Patel
Nickel is a silvery-white metal mostly used to enhance the value, utility, and lifespan of industrial equipment and components by protecting them from corrosion. Nickel is commonly used in the chemical and food processing industries to prevent iron from contamination. Since the properties of nickel can be controlled and varied over broad ranges, nickel plating finds numerous applications in indust
Stainless steel zirconium alloy waste fo
S. M. McDeavitt, D. P. Abraham
Waste form alloys are being developed at Argonne National Laboratory for the disposal of remnant metallic wastes from an electrometallurgical process developed to treat spent nuclear fuel. This metal waste form consists of the fuel cladding (stainless steel or Zircaloy), noble metal fission products (e.g., Ru, Pd, Mo and Tc), and other metallic wastes. The main constituents of the metal waste stre
Microscopy and neutron diffraction study
D. P. ABRAHAM, J. W. RICHARDSON JR.
The study investigates the microstructure and phase stability of zirconium-8 wt% stainless steel (Zr-8SS) alloy, which is significant for the development of a metal waste form from spent nuclear fuels. The objective is to understand the microstructural evolution and phase transformations during thermal aging to predict the corrosion behavior of this alloy in waste management applications. Utilizin
Metal waste forms from the electrometall
Daniel P. Abraham, Sean M. McDeavitt
Stainless steel-zirconium alloys are being developed for the disposal of radioactive metal isotopes isolated using an electrometallurgical treatment technique to treat spent nuclear fuel. The nominal waste forms are stainless steel-15 wt% zirconium alloy and zirconium-8 wt% stainless steel alloy. These alloys are generated in yttria crucibles by melting the starting materials at 1600°C under an ar
Electroplating of nickel from acetate based bath – Hull Cell studies
K. R. Marikkannu, K. Surya Kala
This study investigates the electroplating of nickel onto steel substrates using an acetate-based bath containing nickel acetate, nickel chloride, boric acid, and acetic acid, focusing on various operating conditions such as bath composition, current density, and temperature. The objectives include optimizing deposition parameters via Hull Cell experiments and examining the effects of these parame
WHAT IS ELECTROLESS NICKEL?
Brenner, Riddell
Electroless nickel plating, a process that does not require electrical current or anodes, relies on autocatalytic deposition from an aqueous solution containing metal ions, a reducing agent, and stabilizers. This unique method permits uniform coating of internal surfaces of various parts, a feat challenging for traditional electroplating. Although electroless nickel (EN) plating emerged in the 194
Effects of Eiectroless Nickel Process Variables on Quality Requirements
Fielding Ogburn, Christian E. Johnson
Deposition rate, phosphorus content, hardness, appearance, and metal distribution are reported for deposits from two acid, hypophosphite type electroless nickel baths, one proprietary and one non-proprietary. The baths were operated under a variety of conditions with variations of composition. Extensive data is given on the relation of deposit hardness to phosphorus content and to heat treatment a
The mechanism of cathodic electrodeposition of epoxy coatings and the corrosion behaviour of the electrodeposited coatings
VESNA B. MI[KOVI]-ST ANKOVI], M. D. Maksimovi}
The study investigates the mechanism of cathodic electrodeposition of epoxy coatings, focusing on the growth of organic films during the deposition process. The objective was to develop a model that defines current density-time and film thickness-time relationships, and evaluate the rate constants for hydroxide ion evolution and organic film deposition. A comprehensive methodology employing electr
The influence of zinc surface pretreatment on the adhesion of epoxy coating electrodeposited on hot-dip galvanized steel
J.B. Bajat, V.B. Mi ˇskovi´c-Stankovi´c
The adhesion and electrochemical properties of epoxy coatings electrodeposited on hot-dip galvanized steel with and without passive films were investigated during exposure to 3% NaCl. The passive films were formed in hot air, in boiling water and by chromating. Adhesion was measured both by a standardized pull-off method and by swelling in N-methyl pyrrolidone. Pretreatment of hot-dip galvanized s
Study of Glycerol as an Additive in Ni-Mo Electrodeposition
Javan Grisente dos Reis da Costa, Cláudia Lisiane Fanezi da Rocha
This paper evaluates the effect of adding glycerol to the electrodeposition bath on the deposition efficiency and characteristics of Ni-Mo coating in concentrations ranging from 0.07 to 0.82 mol.L-1. Evaluation of the corrosion resistance was performed by means of weight loss tests in four different periods of immersion. Electrochemical techniques, such as obtaining polarization curves, linear pol
Microstructure and corrosion resistance of electrodeposited zinc alloy coatings
R. Ramanauskas, R. Jusˇk_enas
A heat treatment effect on the microstructure and corrosion properties of electrodeposited Zn, Zn-Co, Zn-Fe, and Zn-Ni alloy coatings was studied. Surface morphology examinations were carried out using AFM, while XRD determined metal lattice parameters, texture, and phase composition. Low-temperature annealing (at 225 °C to 176 °C) resulted in the formation of intermetallic Fe/Zn compounds and a t
Initial corrosion behavior of composite coatings obtained by co-electrodeposition of zinc with nanoparticles of Ti and Ce oxides
Patrick Ioan Nemeş, Maria Zaharescu
The present work reports the results obtained for the electrodeposition of composite Zn coatings on steel by using Ti and Ce oxides nanopowders, separately or in mixture, and a TiO2·CeO2 binary oxide. In an attempt to correlate the effects of nanoparticles on corrosion behavior of the composite deposits, the properties of Zn–TiO2·CeO2 layers were compared with those referring to similar coatings p
Corrosion inhibition potential of ethanol extract of Bryophyllum pinnatum leaves for zinc in acidic medium
Idris, Bamishaiye OM
Corrosion is a significant challenge in various industrial applications, particularly within oil and gas sectors, leading to financial losses estimated at over $2.5 trillion globally. This study aims to investigate the corrosion inhibition potential of ethanol extract from Bryophyllum pinnatum leaves on zinc in acidic environments. A series of electrochemical experiments were conducted to assess t
Electrolytic deposition and corrosion resistance of Zn–Ni coatings obtained from sulphate-chloride bath
KATARZYNA WYKPIS, MAGDALENA POPCZYK
Zn–Ni coatings were deposited under galvanostatic conditions on steel substrate (OH18N9). This study aimed to investigate the influence of current density on the surface morphology, chemical and phase composition of the deposited Zn–Ni coatings, as well as to assess their corrosion resistance in a 5% NaCl solution. The deposition process was carried out at current densities ranging from 10 to 25 m
Electrochemical characterisation of the porosity and corrosion resistance of electrochemically deposited metal coatings
F.C. Walsh, C. Ponce de León
This study focuses on the electrochemical techniques used to assess the porosity and corrosion resistance of various electrodeposited metal coatings. The objective was to illustrate the determination of porosity and, subsequently, the corrosion resistance through electrochemical data gathered from three coating/substrate systems: electroless nickel on aluminium and steel, as well as immersed gold
Effects of pH Value of the Electrolyte and Glycine Additive on Formation and Properties of Electrodeposited Zn-Fe Coatings
Esmail Hakki Karahan
This study investigates the influence of pH value of the electrolyte and the presence of glycine on the formation and properties of electrodeposited zinc-iron (Zn-Fe) coatings. The primary objective was to evaluate the uniformity and corrosion protection performance of these coatings when applied in an environmentally friendly and cyanide-free sulfate bath under continuous current. Electrochemical
Effect of Additives on Morphology Texture And Corrosion Resistance of Electrodeposited Zinc And Zinc-Cobalt Alloy
S.Selvakumari, M.Chandran
Zinc and Zinc –Cobalt alloy are widely used to protect iron and steel substrates against corrosion. In the present study, zinc and zinc – Cobalt alloys were electrodeposited from alkaline baths under incessant current and also in the presence of Vanillin (Vn), Saccharin (Sa), and Rochelle salt (Rs) as additives. AAS and EDAX show the coexistence of additives in the deposit. The deposit morphology
Corrosion Study of Electrodeposited Zn and Zn-Co Coatings in Chloride Medium
Pedro De Lima-Neto, Adriana N. Correia
A corrosão de eletrodepósitos de Zn e Zn-Co em solução aquosa de NaCl 0.1 mol dm -3 foi investigada usando técnicas de microscopia eletrônica de varredura (SEM), energia dispersiva de raios-X (EDX), dissolução anódica sob controle galvanostático (GES), impedância eletroquímica (EIS) e medidas de potencial de circuito aberto (Eoc). Todos os eletrodepósitos foram feitos sobre aço carbono. Fases inte
Corrosion resistance and microstructure of electrodeposited nickel–cobalt alloy coatings
Meenu Srivastava, V. Ezhil Selvi
Ni–Co alloys with varying cobalt content were electrodeposited employing sulphamate electrolyte. The changes in microstructure and corrosion behavior of electrodeposited nickel with respect to cobalt addition were studied. Scanning electron microscope, optical microscope and energy dispersive X-ray analysis were used to characterize the alloy coatings. The alloy co-deposition was observed to be an
Corrosion behaviour of zinc–nickel coatings, electrodeposited on steel
M. Gavrila, J.P. Millet
The electrochemical behaviour of sacrificial zinc–nickel coatings, electrodeposited onto low alloy steel is studied in a neutral, saline, aqueous environment, considering different preparation conditions such as the nature of the bath, density of electrodeposition current, degassing, and chromate passivation. Stability of the sacrificial properties is determined through open circuit potential meas