A study of the kinetics and mechanism of brass dezincification by radiotracer and electrochemical methods

Pchel'nikov, A. P.; Sitnikov, A.D.; Маршаков, И. К.; Losev, V. V.

doi:10.1016/0013-4686(81)80025-4

Cited by 61 publications

(34 citation statements)

References 13 publications

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“…It is the measurable property directly accessible from experiments. 53,54 Of course, if the stored charge is directly proportional to the voltage, i.e., the dependence between Q and V 0 is linear, then C = C d . The Fig.…”

Section: B Charge and Capacitance Dependence On Electrostatic Potentialmentioning

confidence: 99%

“…In this work our principal objective is to study adsorption of the RPM in slit-like pores of different width and to determine the dependence of the double layer capacitance on the pore width by using the developments of Wang et al 23,24 Contrary to previous works, 34,44,52 we investigate the differential double layer capacitance that is a directly measurable quantity, 53,54 rather than the (integral) capacitance. We also pay attention to the questions that have been omitted in the previous studies, namely how the relationship of the differential double layer capacitance on the pore width is dependent on the value of the electrostatic potential at the wall and on the bulk fluid density.…”

Section: Introductionmentioning

confidence: 99%

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Electric double layer capacitance of restricted primitive model for an ionic fluid in slit-like nanopores: A density functional approach

Pizio

Sokołowski

Sokołowska

2012

The Journal of Chemical Physics

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We apply recently developed version of a density functional theory [Z. Wang, L. Liu, and I. Neretnieks, J. Phys.: Condens. Matter 23, 175002 (2011)] to study adsorption of a restricted primitive model for an ionic fluid in slit-like pores in the absence of interactions induced by electrostatic images. At present this approach is one of the most accurate theories for such model electric double layers. The dependencies of the differential double layer capacitance on the pore width, on the electrostatic potential at the wall, bulk fluid density, and temperature are obtained. We show that the differential capacitance can oscillate as a function of the pore width dependent on the values of the above parameters. The number of oscillations and their magnitude decrease for high values of the electrostatic potential. For very narrow pores, close to the ion diameter, the differential capacitance tends to a minimum. The dependence of differential capacitance on temperature exhibits maximum at different values of bulk fluid density and applied electrostatic potential.

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Section: B Charge and Capacitance Dependence On Electrostatic Potentialmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electric double layer capacitance of restricted primitive model for an ionic fluid in slit-like nanopores: A density functional approach

Pizio

Sokołowski

Sokołowska

2012

The Journal of Chemical Physics

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“…In case of Cu-27Zn, Cu-30Zn and Cu-37Zn alloys, the weight loss increases with exposure period owing to a dezincification process [49][50][51], which is directly related to the Zn content in the Cu-Zn alloys. It can be seen in figure 4 that the weight loss of the Cu-37Zn alloy with a higher Zn content is higher than in Cu-27Zn and Cu-30Zn.…”

Section: Kinetics Of Corrosion Processmentioning

confidence: 99%

Corrosion behavior of metals and alloys in marine-industrial environment

Natesan

Selvaraj

Manickam³

et al. 2008

Science and Technology of Advanced Materials

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This work deals with atmospheric corrosion to assess the degrading effects of air pollutants on ferrous and non-ferrous metals and alloys, which are mostly used as engineering materials. An exposure study was conducted in the Tuticorin port area located on the east coast of South India, in the Gulf of Mannar with Sri Lanka to the southeast. Common engineering materials, namely mild steel, galvanized iron, Zn, Al, Cu and Cu-Zn alloys (Cu-27Zn, Cu-30Zn and Cu-37Zn), were used in the investigation. The site was chosen where the metals are exposed to marine and industrial atmospheres. Seasonal 1 to 12 month corrosion losses of these metals and alloys were determined by a weight loss method. The weight losses showed strong corrosion of mild steel, galvanized iron, Cu and Zn and minor effect on Al and Cu-Zn alloys. Linear regression analysis was conducted to study the mechanism of corrosion. The composition of corrosion products formed on the metal surfaces was identified by x-ray diffraction and Fourier transform infrared spectroscopy.

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“…The an odic dis so lu tion of bi nary al loys in dif fer ent aque ous en vi ron ments has been in ves ti gated un der a wide range of ex per i men tal con di tions [1][2][3][4][5][6] mainly fol low ing a dispute be tween se lec tive and si mul ta neous dis so lu tion processes of the com po nents. In this work, the dis so lu tion of com mer cial brass (60.8Cu-36.3Zn-2.9Pb) in 0.1 M HCl was in ves ti gated.…”

Section: Introductionmentioning

confidence: 99%

“…An un der stand ing of the al loy dis so lu tion mech a nism re quires knowl edge of such a pro cess for pure cop per. De spite the num ber of pub li ca tions on this subject [5][6][7][8] , the dis so lu tion of Cu-Zn al loys con tain ing Pb has not re ceived much at ten tion. The aim of this pa per is to obtain in for ma tion on the electrodissolution mech a nism of com mer cial brass in 0.1 M HCl, us ing cy clic voltammetry and a ro tat ing ring-disk elec trode.…”

Section: Introductionmentioning

confidence: 99%

The electrochemical behavior of brass in 0.1 M HCl solution

Geler¹,

Azambuja²

1997

J. Braz. Chem. Soc.

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Estudou-se a eletrodissolução de um latão comercial (60,9Pb) e do cobre em HCl 0,1 M usando a técnica de voltametria cíclica e eletrodo rotatório de disco e anel. O mecanismo de dissolução deste latão e do cobre apresentam diferentes parâmetros cinéticos. O mecanismo de dissolução do componente Cu da liga é análogo ao do cobre puro.The electrodissolution of com mer cial brass (60.8Cu-36.3Zn-2.9Pb) and pure cop per in 0.1 M HCl were com par a tively stud ied us ing cy clic voltammetry and a ro tat ing ring-disk electrode. The dis so lu tion mech a nism of both spec i mens pres ents dis tinct ki netic pa ram e ter s. How ever, the dis so lu tion mech a nism of the Cu com po nent of brass is the same as that ob serv ed for pure cop per. Key words: cop per dis so lu tion, ( α+β)-brass, ro tat ing ring-disk elec trode, voltammetry In tro duc tionThe an odic dis so lu tion of bi nary al loys in dif fer ent aque ous en vi ron ments has been in ves ti gated un der a wide range of ex per i men tal con di tions 1-6 mainly fol low ing a dispute be tween se lec tive and si mul ta neous dis so lu tion processes of the com po nents. In this work, the dis so lu tion of com mer cial brass (60.8Cu-36.3Zn-2.9Pb) in 0.1 M HCl was in ves ti gated. An un der stand ing of the al loy dis so lu tion mech a nism re quires knowl edge of such a pro cess for pure cop per. De spite the num ber of pub li ca tions on this subject 5-8 , the dis so lu tion of Cu-Zn al loys con tain ing Pb has not re ceived much at ten tion. The aim of this pa per is to obtain in for ma tion on the electrodissolution mech a nism of com mer cial brass in 0.1 M HCl, us ing cy clic voltammetry and a ro tat ing ring-disk elec trode. Ex per i men tal MethodA con ven tional three elec trode cell has been used. The elec tro chem i cal mea sure ments were made us ing a Cu disk (99.99% pure), and one of com mer cial brass (60.8Cu-36.3Zn-2.9Pb) with a 0.2 cm 2 ap par ent area as a work ing elec trode. Each elec trode was pol ished with emery pa per up to grade 600, and rinsed with al co hol and distilled wa ter. To de tect the for ma tion of sol u ble spe cies, dur ing the voltammetric sweep of the work ing elec trodes (Cu and brass) a ro tat ing ring-disk elec trode (RRDE) with a gold ring was used. The col lec tion ef fi ciency of the RRDE is N = 0.50 9 . For the de tec tion of the cuprous spe cies the ring po ten tial was fixed at 0.45 V vs. SCE, in which ox i dation to Cu(II) takes place. To de tect the Cu(II) spe cies, the ring po ten tial was set at -0.1 V vs. SCE. A sat u rated cal omel elec trode (SCE) was used as the ref er ence, and all poten tials were re ferred to this elec trode. A large area Pt wire, prop erly shielded, was used as the coun ter elec trode. The elec tro lyte so lu tions con sisted of 0.1 M HCl pre pared from an a lyt i cal grade re agents and twice dis tilled wa ter. Ex per iments were car ried out un der Ar gas sat u ra tion at 298 K. A bipotentiostat (EG&C, model 366) and a ro ta tor (EG&C, model 636) were em ployed for the mea sure ments. ...

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A study of the kinetics and mechanism of brass dezincification by radiotracer and electrochemical methods

Cited by 61 publications

References 13 publications

Electric double layer capacitance of restricted primitive model for an ionic fluid in slit-like nanopores: A density functional approach

Electric double layer capacitance of restricted primitive model for an ionic fluid in slit-like nanopores: A density functional approach

Corrosion behavior of metals and alloys in marine-industrial environment

The electrochemical behavior of brass in 0.1 M HCl solution

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