Influence of chloride and <scp>pH</scp> on the pitting mechanism of <scp>Zn‐Ni</scp> alloy coating in sodium chloride solutions

Anwar, Shams; Khan, Faisal; Caines, Susan; Zhang, Yahui

doi:10.1002/cjce.23920

Cited by 14 publications

(5 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…has published 129 articles that mention pH as a keyword. The topics include diethylenetriamine as a selective pyrrhotite depressant, [ 64 ] pitting mechanisms of Zn‐Ni alloy coating, [ 65 ] and water/oil emulsion stability. [ 66 ] To better identify relationships between diverse areas of research like these, we applied the program VOSViewer to generate a bibliometric map of the 100 most frequently cited keywords (Figure 4).…”

Section: Applicationsmentioning

confidence: 99%

Experimental methods in chemical engineering: pH

et al. 2022

View full text Add to dashboard Cite

All chemical, biochemical, and biological processes depend on pH. Since the 1920s, when the first electrode was introduced to determine the concentration of hydrogen ions, pH measurement techniques have been evolving to fit the application at laboratory and industrial scales. These techniques include conventional methods based on electrical and optical methods like glass electrodes and variants. Most of the current methods still require a probe to be immersed in a solution. However, biomedical applications in the development stages involve non‐invasive probes that measure hydrogen ion concentration or electrical conductivity, which is related to the concentration of all ions. Instruments also measure both these properties simultaneously for water analysis, agriculture, and electrochemistry. pH drops by as much as 90% increasing temperature from 5–45°C (for MgSO4, NaCl, and an acetate buffer). The repeatability is excellent for a glass electrodes, which continues to be the measurement technique of choice for most laboratories, with a standard deviation of better than 0.08% for low molar concentrations (0.05 M) that increases to above 0.2% at high molar concentrations (>0.7 M). Besides the standard potentiometric methods, emerging techniques include ion‐sensitive field transistors, pH imaging, conductometric, acoustic microsensors, microcantilevers, and spectroscopy. In the first 6 months of 2020, Web of Science indexed almost 10 000 articles that mentioned pH as a keyword; most were in environmental sciences, multidisciplinary chemistry, and chemical engineering. Here, we review the latest developments, including spectroscopic methods, progress towards miniaturization, in particular for bio‐medical applications like skin and bio‐fluids, unconventional sampling, repeatability, and uncertainty.

show abstract

Section: Applicationsmentioning

confidence: 99%

Experimental methods in chemical engineering: pH

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Zn–Ni alloy coatings are widely used in the aerospace, automotive, and electronic industries as protective layers because of their excellent corrosion resistance and easy processing (Chouchane et al , 2007; Anwar et al , 2021; Roventi et al , 2000; Huang et al , 2016; Zhu et al , 2023; Nguyen et al , 2023; Xia et al , 2022; Zhang et al , 2021). Therefore, the electrodeposition of Zn–Ni alloy coatings has attracted great interest.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on electronucleation and growth mechanism of Zn–Ni alloy in deep eutectic solvent

Sun,

Cui,

Wang

et al. 2023

ACMM

View full text Add to dashboard Cite

Purpose The purpose of this paper is to study the effect of temperature on Zn–Ni alloys in ChCl–Urea. Design/methodology/approach Based on cyclic voltammetry experiments, the deposition behavior and kinetics of the Zn–Ni alloy are studied. The nucleation process of the Zn–Ni alloy is studied in detail via chronoamperometry experiments. The effects of the deposition temperature on the microstructure, Ni content and phase composition of Zn–Ni alloy coatings are investigated via scanning electron microscopy and X-ray diffraction (XRD) combined with classical thermodynamics. Findings The results show that with increasing temperature, the reduction peak shifts toward a more positive electric potential, which is beneficial for the co-electric deposition process, and the diffusion coefficient is estimated. With increasing temperature, the nucleation process of the Zn–Ni alloy becomes a three-dimensional instantaneous nucleation, the typical kinetic parameters are determined using the standard 3D growth proliferation control model and the Gibbs free energy is estimated. The Zn–Ni alloy coatings are prepared via normal co-deposition. With increasing temperature, the degree of crystallinity increases, the coating gradually becomes uniform and compact and the XRD peak intensity increases. Originality/value The nucleation process of the Zn–Ni alloy at different temperatures is analyzed. The diffusion coefficient D and Gibbs free energy are calculated. The contribution of the three processes at different temperatures is analyzed. The effect of temperature on the morphology of the Zn–Ni alloy coatings is studied.

show abstract

“…They remain indefinitely in the ecological systems and in food chains, exposing human health and the ecosystem to a high threat. [1][2][3] In particular, Cd (II) ions emerge as one of the most hazardous heavy metal species in foods and the environment due to their ability to alter various organs and tissues following either acute or chronic exposure. [4] Cadmium and its compounds are highly toxic, which cause hazards to the human body such as damage to the cardiovascular, renal, respiratory, gastrointestinal, neurological, and reproductive systems, [5,6] especially due to their high water solubility.…”

Section: Introductionmentioning

confidence: 99%

Adsorption and removal studies of cadmium ion onto sulphonic/phosphonic acid functionalization resins

2022

Self Cite

View full text Add to dashboard Cite

Cadmium is a persistent bio‐accumulative toxic metallic element, which causes hazardous impacts on living species, water, and the environment. This paper presents the study of cadmium ion removal from aqueous solutions in batch experiments using 22 ion exchange resins with different functional groups. It was found that Dowex G‐26 resin with a sulphonic functional group and Puromet™ MTS9570 resin with sulphonic and phosphonic functional groups had excellent performance for Cd (II) ion removal. The effects of resin dosage, adsorption time, initial concentration of cadmium, and initial pH of solution on cadmium removal were investigated systematically using Dowex G‐26 and Puromet™ MTS9570 resins. Maximum cadmium removal rates of 99.2% and 98.9% were achieved for G‐26 and MTS9570, respectively, at an initial cadmium concentration of 1000 mg/L, an initial solution pH of 5.0, an adsorption time of 30 min, and a 0.01 mg/L resin dosage for G‐26, and a 0.025 mg/L resin dosage for MTS9570. The ion‐exchange adsorption process was fast, and it reached equilibrium after 30 min of adsorption. The results obtained show that both resins performed well for the removal of Cd (II) ions from weakly acidic solutions. Langmuir, Freundlich, and Temkin isotherms models were employed to investigate and understand the adsorption characteristics. The results showed that the studied adsorption processes fitted well to the Langmuir adsorption isotherm. From the Langmuir adsorption isotherm, the maximum adsorption capacities of Cd (II) were found to be 78.125 and 51.020 mg/g for G‐26 and MTS9570, respectively. This research provides an efficient systemic approach for cadmium ion removal from aqueous solutions.

show abstract

Influence of chloride and pH on the pitting mechanism of Zn‐Ni alloy coating in sodium chloride solutions

Cited by 14 publications

References 32 publications

Experimental methods in chemical engineering: pH

Experimental methods in chemical engineering: pH

Effect of temperature on electronucleation and growth mechanism of Zn–Ni alloy in deep eutectic solvent

Adsorption and removal studies of cadmium ion onto sulphonic/phosphonic acid functionalization resins

Contact Info

Product

Resources

About