Spectro-electrochemical studies of the corrosion inhibition of copper by mercaptobenzothiazole

Ohsawa, Masatoshi; Suëtaka, Wataru

doi:10.1016/s0010-938x(79)80069-4

Cited by 75 publications

(20 citation statements)

References 19 publications

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“…The use of corrosion inhibitors is considered as an effective way to protect copper [1][2][3][4][5][6]. The most studied compound is benzotriazole [7][8][9][10][11][12][13][14][15][16][17][18], but there are also other nitrogen and/or sulphur heterocyclic compounds of interest, especially 2-mercaptobenzothiazole (2-MBT) [19][20][21][22][23][24]. The presence of nitrogen and For ULP exposure on metallic Cu(111), the sample was further prepared in a UHV platform equipped with X-ray photoelectron spectroscopy (XPS, Thermo Electron Corporation, ESCALAB 250) with base pressure of ∼ 10 −10 mbar.…”

Section: Introductionmentioning

confidence: 99%

2-Mercaptobenzothiazole corrosion inhibitor deposited at ultra-low pressure on model copper surfaces

Wiame

Maurice

et al. 2020

Corrosion Science

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Adsorption of 2-mercaptobenzothiazole (2-MBT) at ultra-low pressure and room temperature on metallic and pre-oxidized Cu(111) surfaces and its thermal stability were investigated using X-ray photoelectron spectroscopy in order to better understand the interfacial corrosion inhibiting properties. 2-MBT is lying flat in the monolayer with two sulphur atoms bonded to Cu and decomposes partially yielding atomic sulphur when interacting with metallic copper prior to forming molecular multilayers. Decomposition is prevented by surface pre-oxidation with 2D oxide dissociation accelerating the 2-MBT initial adsorption kinetics. 2-MBT further decomposes and partially desorbs above 100 • C. A pre-adsorbed 2-MBT monolayer on metallic copper inhibits surface corrosion. sulphur in the organic molecule could improve its capacity as corrosion inhibitor by forming coordinative bonds with copper [1]. It has been shown that 2-MBT dissolved in solution can react with copper to form a complex which acts as a protective layer at the copper surface [21]. However, controversy exists on the chemical nature of the complex formed, as well as on the fundamental mechanisms of the inhibiting interaction. The resulting structures of the protective layer formed on copper are also still not clear. Most notably, the exact role of the surface oxide in the inhibiting function remains to be studied. With few exceptions [12], experimental research concerning corrosion inhibitors have been done by immersion into solutions containing the organic compounds [7-24]. However, in order to elucidate the interaction mechanisms, deposition of the molecule evaporated in vacuum could be more insightful, since it allows controlling each step of the deposition process in a well-defined environment and on a well-defined surface. Data have been reported for vacuum evaporation [25, 26] of 1,4-benzenedimethanethiol (BDMT) on Au(111), Au(110), Cu(100) and Cu(111) single crystal surfaces. The authors found that on Cu (100) and Cu(111) surfaces, which are more reactive, BDMT dissociates in the initial stage of adsorption, resulting in atomic S adsorbed on the Cu surface. This phenomenon was not observed for the adsorption of benzotriazole on Cu(100) [27].In this work, the adsorption of 2-MBT at ultra-low pressure (ULP) and room temperature on clean and pre-oxidized Cu(111) surfaces and its effect on the oxidation of copper were investigated using ultra-high vacuum (UHV) spectroscopic techniques. The results were compared to those obtained for ULP deposition on the oxide-covered Cu(111) surface prepared in air. The thermal stability of the adsorbed molecular layer under UHV was also studied. This work brings new insight into the interaction of 2-MBT with copper, which allow us to better understand its corrosion inhibition mechanisms. Material and methodsA high purity (99.999%) Cu(111) single-crystal was used in this work. The surface was mechanically polished to 1/4 µm (diamond paste), successively rinsed with acetone, ethanol, and ultra pure (UP) water (resistivity > 18...

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Section: Introductionmentioning

confidence: 99%

2-Mercaptobenzothiazole corrosion inhibitor deposited at ultra-low pressure on model copper surfaces

Wiame

Maurice

et al. 2020

Corrosion Science

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“…It is considered that initially 2-MBT molecule is adsorbed in the metal surface through the exo-sulfur atom (Oshawa and Süetaka, 1979;Subramaninan and Lakshminarayanan, 2002;Kazansky et al, 2012;Ramenzanzadeh et al, 2014) this fact is possible because 2-MBT molecules exhibit the thiolthione tautomerism (Oshawa and Süetaka, 1979;Ramenzanzadeh et al, 2014), in the range of pH of 3 to 9 (Jing et al, 2013), which leads to an anionic form of 2-MBT (Winkler et al, 2014) (Fig. 8).…”

Section: Frequency Response Over Timementioning

confidence: 99%

Direct measurement of the adsorption kinetics of 2-Mercaptobenzothiazole on a microcrystalline copper surface

Tur¹,

Véleva²

2016

REVMETAL

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ABSTRACT:The adsorption on copper of 2-Mercaptobenzothiazole (2-MBT), a heterocyclic compound member of the tiazole family, has been investigated at different concentrations (1×10 −1 to 1×10 −6 M) in water, employing the Electrochemical Quartz Crystal Microbalance (EQCM). The frequency response over time was obtained for each concentration, showing a defined exponential behavior at higher concentrations (1×10 RESUMEN: Medición directa de la cinética de adsorción del 2-Mercaptobenzotiazol en una superficie micro cristalina de cobre.En el presente trabajo se ha investigado la adsorción del 2-Mercaptobenzotiazol (2-MBT) en cobre, un compuesto heterocíclico miembro de la familia de los tiazoles, en solución acuosa a diferentes concentraciones (1×10 −1 a 1×10 −6 M), empleando la Balanza Electroquímica de Cristal de Cuarzo (BECC). Se midió y analizó el cambio de frecuencia con respecto al tiempo para cada concentración, mostrando un comportamiento exponencial definido en el rango de concentraciones altas (1×10 −1 , 1×10 −2 y 1×10 −3 M), los cambios de frecuencia registrados se ajustaron usando la isoterma de adsorción de Langmuir obteniendo buenos coeficientes de correlación (R 2 =0,91 a 0,98). Se calculó también la fracción de superficie recubierta y se halló que se encuentra en el orden de 0,50 a 0,01 para las concentraciones altas de 2-MBT. La energía libre de adsorción calculada fue de ΔG ads =−5,59 kJ mol −1 , lo cual corresponde a un proceso de fisisorción.

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“…The pK a of MBTH is 6.93 [34]. In acidic solution it exists predominantly in the thione [35,36] form. This is supported by the presence of a band at 3113 cm MBTH is known to form a thin polymeric film [37] on Cu forming a complex of the type [Cu (1) BTH] n thus yielding high inhibitor efficiency [38].…”

Section: Volume 14mentioning

confidence: 99%

Inhibition of Brass Corrosion in Acid Medium Using Thiazoles

Taha

Mohamed

Khalil

et al. 2013

ILCPA

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Brass as an alloy composed mainly of copper is great industrial uses such as heat exchangers and similar other facility due to its good thermal properties. Due to the presence of the considerable ratio of zinc the alloy suffers from zinc dissolution or dezincification. Dezincification rate increases with the increase in the ratio of zinc in the alloy. In this study benzothiazole (BTH) and its substituent's 2-methylbenzothiazole (MeBTH), 2-aminobenzothiazole (ABTH), 2-mercaptobenzothiazole (MBTH) and 2-phenylbenzothiazole (PhBTH) have been used as corrosion inhibitors for α-brass in stirred 0.1 M HClO 4 . The methods of investigation include weight loss, Tafel and linear polarizations and electrochemical impedance spectroscopy. The order of inhibition efficiency (% E) was calculated and the values obtained has indicated the sequence of inhibition efficiency was found to be BTH < MeBTH < ABTH < PhBTH < MBTH. The calculated values of thermodynamic parameters support this order. The inhibitors were found to suppress the corrosion rate by the formation of films which were identified by IR, SEM and EDAX techniques.

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Spectro-electrochemical studies of the corrosion inhibition of copper by mercaptobenzothiazole

Cited by 75 publications

References 19 publications

2-Mercaptobenzothiazole corrosion inhibitor deposited at ultra-low pressure on model copper surfaces

2-Mercaptobenzothiazole corrosion inhibitor deposited at ultra-low pressure on model copper surfaces

Direct measurement of the adsorption kinetics of 2-Mercaptobenzothiazole on a microcrystalline copper surface

Inhibition of Brass Corrosion in Acid Medium Using Thiazoles

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