Development of novel brasses to resist dezincification

Ramji, Karpagavalli; Balasubramaniam, R.

doi:10.1016/j.corsci.2006.06.024

Cited by 54 publications

(13 citation statements)

References 21 publications

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“…As the experiment proceeded, both galvanic current and zinc leaching gradually increased. The authors speculate that this occurred because the surface of brass gradually became porous and covered with scale, which can accelerate dezincification attack (Karpagavalli & Balasubramaniam, 2007).…”

Section: Resultsmentioning

confidence: 99%

Effects of pH, chloride, bicarbonate, and phosphate on brass dezincification

Zhang¹,

Edwards²

2011

Journal AWWA

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Plumbing failures associated with brass dezincification have recently been reported in some areas of the United States, prompting research to identify the interplay between water chemistry and dezincification propensity. This research identified a critical pH range (8–9) at which “meringue” dezincification was problematic. In addition, the authors have refined interpretation of the classic Turner diagram by attributing beneficial effects to higher alkalinity rather than hardness (or temporary hardness). Among other findings, chloride exacerbates the dezincification propensity of water (high galvanic current/ voltage and zinc leaching) by increasing zinc solubility and decreasing pH at brass surfaces in galvanic couples to copper pipe, leading to increased weight loss and formation of corrosion products. Inhibitive effects of orthophosphate dissipated after around 100 days, calling into question the long‐term efficacy of phosphate inhibitors in mitigating brass dezincification.

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Section: Resultsmentioning

confidence: 99%

Effects of pH, chloride, bicarbonate, and phosphate on brass dezincification

Zhang¹,

Edwards²

2011

Journal AWWA

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“…To further investigate this site-specific growth mechanism, additional experiments were also carried out. It is well known that when Cu-Zn alloy is annealed under dynamical vacuum, the Zn species selectively evaporates, leaving a copper-rich structure behind, which is called the dezincification process [18]. Fig.…”

Section: Resultsmentioning

confidence: 99%

Genetic patterns of Zn2GeO4 coated ZnO nanowires from phase texture distribution of biphase brass substrate

Chen

Liu

Zhang

et al. 2010

Journal of Crystal Growth

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“…De-alloying of Zn or dezincification in brass is a commonly noticed corrosion phenomenon (Gladen et al 1990;Jagodzinski et al 2000;Karpagavalli and Balasubramaniam 2007). Several researchers have studied dezincification and suggested different mechanisms based on dissolution of active metal ions (Pickering and Wagner 1967), inter-diffusion (Pickering and Wagner 1967) and percolation theory (Sieradzki and Newman 1986;Newman et al 1988).…”

Section: Introductionmentioning

confidence: 99%

Porous copper template from partially spark plasma-sintered Cu-Zn aggregate via dezincification

et al. 2014

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Present work deals with the preparation of spark plasma-sintered Cu-Zn aggregate (5, 10 and 20 wt% Zn) with interfacial bonding only starting from elemental powders of Cu and Zn (99⋅9% purity) and subsequently making of porous template of Cu by dezincification. Sintering is done so as to achieve only interfacial bonding with the aim to maintain maximum potential difference between the Cu and Zn particles during dezincification process in various solutions, viz. 1 N HCl and 3⋅5 wt% NaCl solutions. X-ray diffraction, optical microscopy and SEM-EDS are carried out to examine microstructural evolution and subsequent changes in hardness with sintering temperatures and different Zn percentages. Dezincification and pore formation are conducted on sintered 0⋅5 mm thick 12 mm diameter disc samples. The size, distribution and nature of pores in porous templates of Cu are then investigated using optical microscopy and SEM-EDS analysis.

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Development of novel brasses to resist dezincification

Cited by 54 publications

References 21 publications

Effects of pH, chloride, bicarbonate, and phosphate on brass dezincification

Effects of pH, chloride, bicarbonate, and phosphate on brass dezincification

Genetic patterns of Zn2GeO4 coated ZnO nanowires from phase texture distribution of biphase brass substrate

Porous copper template from partially spark plasma-sintered Cu-Zn aggregate via dezincification

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