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Showing papers on "Corrosion published in 2010"


Journal ArticleDOI
TL;DR: A survey of previous work related to the relationship between grain size and corrosion resistance for a number of light metamodel classes can be found in this article, with a focus on the effect of grain size on corrosion.
Abstract: Grain refinement is known to lead to improvements in strength and wear resistance. Inherent processing involved in grain refinement alter both the bulk and the surface of a material, leading to changes in grain boundary density, orientation, and residual stress. Ultimately, these surface changes can have an impact on electrochemical behavior and, consequently, corrosion susceptibility as evidenced by the large number of studies on the effect of grain size on corrosion, which span a range of materials and test environments. However, there has been limited work on developing a fundamental understanding of how grain refinement and more generally how grain size affects the corrosion resistance of an alloy. Existing literature is often contradictory, even within the same alloy class, and a coherent understanding of how grain size influences corrosion response is largely lacking. A survey of previous work related to the relationship between grain size and corrosion resistance for a number of light meta...

873 citations


Book
15 Jan 2010
TL;DR: A Brief Review of Thermodynamics of Corrosion: Electrochemical Cells and Galvanic Corrosions as mentioned in this paper, and Pourbaix Diagrams is a good starting point.
Abstract: Societal Aspects of Corrosion.- Getting Started on the Basics.- Charged Interfaces.- A Brief Review of Thermodynamics.- Thermodynamics of Corrosion: Electrochemical Cells and Galvanic Corrosion.- Thermodynamics of Corrosion: Pourbaix Diagrams.- Kinetics of Corrosion.- Concentration Polarization and Diffusion.- Passivity.- Crevice Corrosion and Pitting.- Mechanically Assisted Corrosion.- Corrosion Inhibitors.- Corrosion Under Organic Coatings.- AC Impedance.- High-Temperature Gaseous Oxidation.- Selected Topics in Corrosion Science.- Beneficial Aspects of Corrosion.

771 citations


Journal ArticleDOI
TL;DR: In this article, the authors examined the recent literature to further examine the electrochemical measurement hypothesis for Mg and found that the corrosion of Mg alloys can be adequately estimated using Tafel extrapolation of the polarisation curve.

752 citations


Journal ArticleDOI
TL;DR: In this paper, a review of the pertinent literature combined with the authors' works reveals that a relationship exists between corrosion rate and grain size and reveals an important fundamental relationship that can be exploited for material durability and design.

707 citations


Journal ArticleDOI
TL;DR: In this article, the authors discuss various issues associated with biological corrosion of different kinds of implants used as cardio stents, orthopedic and dental implants, which is considered to be the best solution to combat corrosion and to enhance the life span of the implants and longevity of the human beings.
Abstract: In the area of materials science, corrosion of biomaterials is of paramount importance as biomaterials are required for the survival of the human beings suffering from acute heart diseases, arthritis, osteoporosis and other joint complications. The present article discusses various issues associated with biological corrosion of different kinds of implants used as cardio stents, orthopedic and dental implants. As the materials used for these implants are manifold starting from metallic materials such as stainless steel (SS), cobalt chromium, titanium and its alloys, bioceramics, composites and polymers are in constant contact with the aggressive body fluid, they often fail and finally fracture due to corrosion. The corrosion behavior of various implants and the role of the surface oxide film and the corrosion products on the failure of implants are discussed. Surface modification of implants, which is considered to be the best solution to combat corrosion and to enhance the life span of the implants and longevity of the human beings is dealt in detail and the recent advances in the coating techniques which make use of the superior properties of nanomaterials that lead to better mechanical properties and improved biocompatibility are also presented.

584 citations


Journal ArticleDOI
TL;DR: In this paper, the authors studied the corrosion resistance of AZ31B alloy with different grain sizes in 3.5% NaCl solution using immersion testing, evolved hydrogen gas measurement and potentiodynamic polarisation measurement.

477 citations


Journal ArticleDOI
TL;DR: In this paper, a novel LDH-based nanocontainers of corrosion inhibitor are developed, which are composed by nanostructured layered double hydroxides with divanadate anions located in the interlayer regions.

454 citations


Journal ArticleDOI
TL;DR: The best corrosion behaviour of the AZ31 alloy was obtained for the finest grain alloy associated with the highest transfer resistance value, after long periods of immersion in PBS.

422 citations


Journal ArticleDOI
TL;DR: In this paper, a series of techniques, such as polarization, electrochemical impedance spectroscopy (EIS), weight loss and quantum chemical calculation methods, have been used to study the adsorption process of four derivatives of piperidinylmethylindoline-2-one on mild steel surface.

406 citations


Journal ArticleDOI
TL;DR: In this article, the effect of KCZ on the corrosion rate was determined at various temperatures and concentrations, and the inhibition efficiency increases with increase in inhibitor concentration but decrease with rise in temperature.

399 citations


Journal ArticleDOI
TL;DR: In this article, the main results found in recent literature about the corrosion performance of metallic bipolar plates are presented and compared to graphite-based ones, and the results show that metallic materials have better mechanical strength and better electrical conductivity than graphite materials.

Journal ArticleDOI
TL;DR: In this paper, the corrosion inhibition of mild steel in 10 mM HCl solution by four Schiff bases was investigated using weight loss and electrochemical measurements and quantum chemical calculations All compounds showed >90% inhibition efficiency at their optimum concentrations The activation energy of corrosion and other thermodynamic parameters were calculated to elaborate the mechanism of corrosion inhibition.

Journal ArticleDOI
TL;DR: In this article, the authors reviewed the S-phase surface engineering of stainless steels, Co-Cr alloys, and Ni-cr alloys and paid particular attention to the structure, formation conditions, supersaturation, hardening mechanisms and metastability of these materials.
Abstract: Stainless steel, Co-Cr and Ni-Cr alloys have played an important role in many industrial sectors to combat environmental degradation. However, low hardness and poor wear properties have impeded their tribological and tribochemical applications. Conventional thermochemical treatments can be used to significantly harden these passive alloys but at the expense of their corrosion resistance due to precipitation induced depletion of Cr in the matrix. Research in 1980s led to the discovery of a new expanded austenite phase, i.e. so called S-phase with combined improvement in wear and corrosion resistance. Recent research has revealed that S-phase can be formed not only in stainless steels but also in Co-Cr alloys and Ni-Cr alloys. It is the purpose of this paper to critically review the S-phase surface engineering of stainless steels, Co-Cr alloys and Ni-Cr alloys. Particular attention will be paid to the structure, formation conditions, supersaturation, hardening mechanisms and metastability of...

Journal ArticleDOI
TL;DR: It was found that the Mg66Zn30Ca4 sample presents a more uniform corrosion morphology than as-rolled pure Mg and Mg70Zn25Ca5 samples, with much smaller micro-scale uniformly distributed pores beneath the corrosion product layer.

Journal ArticleDOI
TL;DR: In this article, the degradation of mild steel by Murraya koenigii leaves has been studied using weight loss, electrochemical impedance spectroscopy (EIS), linear polarization and potentiodynamic polarization techniques.

Journal ArticleDOI
TL;DR: In this article, the electrochemical properties of the Co1.5CrFeNi 1.5Ti0.5Mox high-entropy alloys were investigated in three aqueous environments which simulate acidic, marine, and basic environments at ambient temperature (∼25 °C).

Journal ArticleDOI
Huanxin Wang1, Shaokang Guan1, Xiang Wang1, Cuihong Ren1, Lili Wang1 
TL;DR: Mg-Zn-Ca alloy coated with Ca-def HA is be a promising candidate for biodegradable orthopaedic implants, and is worthwhile to further investigate the in vivo degradation behavior.

Journal ArticleDOI
Dan Song1, Aibin Ma1, Jinghua Jiang1, Pinghua Lin1, Donghui Yang1, Junfeng Fan1 
TL;DR: In this article, the effect of microstructure change on corrosion behavior of equal-channel-angular-pressed (ECAPed) pure Mg was investigated, and the results indicated that the enhanced initial OCP values indicate better weather resistance.

Journal ArticleDOI
TL;DR: In this article, the inhibition effect of 5-((E)-4-phenylbuta-1, 3-dienylideneamino)-1,3,4-thiadiazole-2-thiol (PDTT) Schiff base on mild steel corrosion in 0.5 M HCl was studied for both short and long immersion time.

Journal ArticleDOI
TL;DR: In this article, the inhibition performance of three Schiff bases containing disulfide bond as corrosion inhibitors for mild steel in 2.0 M HCl has been investigated by weight loss measurements, potentiodynamic polarization measurements and electrochemical impedance spectroscopy.

Journal ArticleDOI
TL;DR: Titanium alloy is one of the materials extensively used in the aerospace industry due to its excellent properties of high specific strength and corrosion resistance, but it also presents problems wherein it is an extremely difficult material to machine as discussed by the authors.
Abstract: Titanium alloy (Ti–6Al–4V) is one of the materials extensively used in the aerospace industry due to its excellent properties of high specific strength and corrosion resistance, but it also presents problems wherein it is an extremely difficult material to machine. The cost associated with titanium machining is also high due to lower cutting speeds (

Journal ArticleDOI
TL;DR: In this paper, the electrochemical passive properties of Al x CoCrFeNi alloys in H 2 SO 4 were investigated by potentiodynamic polarization, EIS, and weight loss tests from 20 to 65°C.

Journal ArticleDOI
TL;DR: In this article, the effect of extract of Aloe vera leaves on the corrosion of zinc in 2 M HCl solution was studied using weight loss technique and the inhibition efficiency increased with increasing concentration of the extract but decreased with increasing temperature.

Journal ArticleDOI
TL;DR: Corrosion of Mg-Y alloys using electrochemical evaluations, immersion tests and direct observations was studied in this paper, which revealed that a predominant feature was hydrogen evolution from particular parts of the alloy surface.

Journal ArticleDOI
TL;DR: The corrosion rate of the two experimental alloys increased under cyclic loading compared to that in the static immersion test, and the fatigue cracks initiated from the micropores when tested in air and from corrosion pits when testing in SBF.

Journal ArticleDOI
TL;DR: Findings cannot be anticipated on the basis of inhibitors' molecular electronic properties alone, thus emphasizing the importance of a rigorous modeling of the interactions between the components of the corrosion system in corrosion inhibition studies.
Abstract: Three corrosion inhibitors for copper-3-amino-1,2,4-triazole (ATA), benzotriazole (BTAH), and 1-hydroxybenzotriazole (BTAOH)-were investigated by corrosion experiments and atomistic computer simulations. The trend of corrosion inhibition effectiveness of the three inhibitors on copper in near-neutral chloride solution is determined experimentally as BTAH ≳ ATA ≫ BTAOH. A careful analysis of the results of computer simulations based on density functional theory allowed to pinpoint the superior inhibiting action of BTAH and ATA as a result of their ability to form strong N-Cu chemical bonds in deprotonated form. While these bonds are not as strong as the Cl-Cu bonds, the presence of solvent favors the adsorption of inhibitor molecules onto the surface due to stronger solvation of the Cl(-) anions. Moreover, benzotriazole displays the largest affinity among the three inhibitors to form intermolecular aggregates, such as [BTA-Cu](n) polymeric complex. This is another factor contributing to the stability of the protective inhibitor film on the surface, thus making benzotriazole an outstanding corrosion inhibitor for copper. These findings cannot be anticipated on the basis of inhibitors' molecular electronic properties alone, thus emphasizing the importance of a rigorous modeling of the interactions between the components of the corrosion system in corrosion inhibition studies.

Journal ArticleDOI
TL;DR: In this paper, the effect of industrial pre-treatment on the corrosion performance of Mg alloy AZ31 sheet was investigated, and it was found that tempering accelerates the corrosion of AZ31.

Journal ArticleDOI
TL;DR: Halloysite is a natural aluminosilicate mineral with hollow cylindrical geometry and submicron size, and it can be loaded with the corrosion inhibitor benzotriazole to improve its anticorrosion performances as well as the coating tensile strength.
Abstract: Halloysite clay tubes of 50 nm diameter and ca. 1000 nm length were analyzed as potential nanocontainers for loading, storage and induced sustained release of chemical agents. Halloysite is a natural aluminosilicate mineral with hollow cylindrical geometry and submicron size. Halloysite nanotubes loaded with the corrosion inhibitor benzotriazole can be admixed into paint to improve its anticorrosion performances as well as the coating tensile strength. Corrosion protection of such coating was evaluated by direct exposure of the coated metal (copper) to highly corrosive media. Loading and release characteristics of benzotriazole from these nanotubes were optimized. Benzotriazole release kinetics correspond to the time needed for the formation of a metal protective layer through copper complexation. For formation of the tube end stoppers, benzotriazole loaded halloysite was exposed to the solution of Cu(II) ions, and kinetics of the stopper complex formation was analyzed. Tunable release of benzotriazole was achieved by controlling the strength of the stopper complexes, and the release time may be varied from ten to hundreds of hours. A possibility for the tube on/off release switch was demonstrated.

Journal ArticleDOI
TL;DR: In this article, the protection influence of glycine (Gly) and a one of its derivatives, namely 2-(bis(2-aminoethyl)amino) acetic acid, designated here as GlyD; where GlyD stands for “glycine derivative”, against cold rolled steel (CRS) corrosion was studied in aerated stagnant 1.0 M HCl solutions at 25°C.

Journal ArticleDOI
TL;DR: In this paper, a correlation between the initial open-circuit potential of fresh brittle intergranular fracture surfaces, the copper content of grain-boundary precipitates (GBP), and the plateau SCC velocities of overaged 7079 and 7075 alloys was found.