The effect of benzotriazole on brass corrosion

Mamaş, Serhat; Kiyak, Tülin; Kabasakaloğlu, M.; Koç, A.

doi:10.1016/j.matchemphys.2005.02.012

Cited by 75 publications

(36 citation statements)

References 23 publications

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“…Chloride ions have a strong influence on copper corrosion and it has been observed that there is a complexation of cuprous ions with chloride ions (Kear et al 2004). Other studies have investigated different effects of chloride ions on the copper corrosion process, with some investigating the passivation of chloride, reducing the reactivity of copper due to the formation of a protective surface layer of by-products (Kosec et al 2007;Mamas et al 2005) while others describe the enhancing effect of chloride ions on copper corrosion (Villamil et al 2002). Chloride ions can also be involved in the pitting corrosion of copper (Duthil et al 1996).…”

Section: Discussionmentioning

confidence: 99%

Inactivation and sub-lethal injury of Escherichia coli in a copper water storage vessel: effect of inorganic and organic constituents

Sharan

Chhibber

Attri

et al. 2010

Antonie van Leeuwenhoek

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This study provides information on the effects of inorganic and organic constituents on inactivation and sub-lethal injury of Escherichia coli in water stored in a copper vessel. E. coli suspensions were stored for up to 24 h in copper vessels containing one of the following dissolved constituents at 1 g/l: salts of inorganic ions, carbohydrates, proteins and complex natural organic mixtures. Samples were surface plated onto (i) nutrient agar, incubated under standard aerobic conditions to provide conventional counts for uninjured bacteria count and onto (ii) nutrient agar plates with 0.5 g/l sodium pyruvate incubated under anaerobic conditions to enumerate sub-lethally injured (oxygen-sensitive) bacteria alongside their healthy counterparts. The concentration of dissolved copper in the stored water was determined using atomic absorption spectrophotometry. The addition of chloride salts resulted in a faster inactivation of E. coli compared to pure water with no dissolved additives, irrespective of the counterion. In contrast, a slower inactivation was observed in the presence of Na(2)SO(4), NaNO(3) and NaNO(2) when compared to NaCl. Addition of the carbohydrates glucose, lactose and starch gave broadly similar results to those obtained using unsupplemented water. However, the addition of amino acids, proteins, humic acid or complex organic mixtures caused a dramatic decrease in inactivation of E. coli, with evidence of a greater number of sub-lethally injured bacteria than was seen with other added constituents. The amount of copper was highest in stored water containing amino acids and complex organic constituents, with the slow inactivation most likely to be due to complex formation between leached copper and these organic constituents. The present study clearly demonstrates that water composition, particularly natural organic constituents, has a substantial impact on the antibacterial effectiveness and dissolved copper concentration of water stored in copper vessels and that both aspects will need to be considered in terms of their impact on the practical use of copper-based systems for small-scale water treatment.

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Section: Discussionmentioning

confidence: 99%

Inactivation and sub-lethal injury of Escherichia coli in a copper water storage vessel: effect of inorganic and organic constituents

Sharan

Chhibber

Attri

et al. 2010

Antonie van Leeuwenhoek

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“…However, reduction of nitric acid by metals can be essentially avoided through incorporation of sulfamic acid and its salts [18,19,21]. Sulfamate ions are capable of reacting with nitrous acid and convert it to sulfuric acid [21,23] according to Equation (2):…”

Section: Effect Of Ammonium Sulfamatementioning

confidence: 99%

“…Benzotriazole is an efficient corrosion inhibitor for copper and copper-based alloys. The copper surface reacts with physically adsorbed benzotriazole molecules to precipitate insoluble Cu-BTA (Copper-Benzotriazole Complex) complexes on the surface [22][23][24][25][26][27]. Two mechanisms have been proposed to account for the high inhibiting efficiency of benzotriazole.…”

Section: Effect Of Ammonium Sulfamatementioning

confidence: 99%

A highly stabilized–inhibited nitric acid/ferric nitrate-based solder stripping solution

Shaigan

Ashrafizadeh

2006

J Appl Electrochem

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The effect of ammonium sulfamate and benzotriazole on the prevention of exothermic conditions, the evolution of toxic NO x gases and the reduction of copper attack during solder stripping were studied. The effect of these additives on the rate of temperature rise for solutions treating 63Sn37Pb solder alloy and pure copper were investigated. Weight loss analysis was also performed in order to evaluate the rate of copper etching in various compositions. Scanning electron microscopy was employed to investigate the nature of the attack on the copper surface. In order to identify the role of ammonium sulfamate and benzotriazole on the stripping process, anodic polarization measurements were performed for the copper electrodes. The results revealed that ammonium sulfamate is capable of eliminating the reduction of nitric acid and the evolution of toxic NO x gases, can prevent excessive temperature rise, and can inhibit the rate of copper etching. On the other hand, benzotriazole is capable of providing a mirror bright copper surface after the solder stripping. Simultaneous addition of ammonium sulfamate and benzotriazole to the stripping solution led to a unique solder stripping composition which is substantially secure in terms of the temperature rise, evolution of toxic NO x gases and copper attack.

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“…N-heterocyclic compounds have been widely used as corrosion inhibitors. Among these azoles are known as one of the best corrosion inhibitors for copper and its alloys in a wide range of environments [10][11][12][13] . Benzotriazole is a good anodic inhibitor for copper in acidic conditions 14 and in chloride solutions 15 .…”

Section: Introductionmentioning

confidence: 99%

Effect of 5-Methylbenzotriazole on the Corrosion Inhibition of Brass in NaCl Solution

2014

Chem Sci Trans

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Abstract:The corrosion behavior of brass in the presence of inhibitor namely 5-methyl benzotriazole (MBTA) has been investigated in 3% NaCl medium. The inhibition efficiency of MBTA was evaluated from chemical and electrochemical techniques. Experimental studies showed that MBTA reduces markedly the corrosion of brass in 3% NaCl solution and this reduction in corrosion rates enhances with increasing concentration of MBTA. Weight loss study revealed that the formulation consisting of 150 ppm of MBTA showed 71% inhibition efficiency. Polarization studies also revealed that the inhibitor act as mixed type for brass in chloride solution. The characterization of corrosion product on brass in presence of MBTA was analysed by FTIR.

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The effect of benzotriazole on brass corrosion

Cited by 75 publications

References 23 publications

Inactivation and sub-lethal injury of Escherichia coli in a copper water storage vessel: effect of inorganic and organic constituents

Inactivation and sub-lethal injury of Escherichia coli in a copper water storage vessel: effect of inorganic and organic constituents

A highly stabilized–inhibited nitric acid/ferric nitrate-based solder stripping solution

Effect of 5-Methylbenzotriazole on the Corrosion Inhibition of Brass in NaCl Solution

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