Applied sciences

Archives of Metallurgy and Materials

Content

Archives of Metallurgy and Materials | 2022 | vol. 67 | No 4

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Abstract

Solidification/Stabilization (S/S) method with cement as a binder to remediate metals in petroleum sludge has been successfully proven. However, this technique has not yet been explored to remediate organic contaminants since a high concentration of Total Petroleum Hydrocarbon (TPH) was also detected in the sludge. This study focuses on remediating 16 Polycyclic Aromatic Hydrocarbons (PAHs) compounds in raw petroleum sludge with Portland cement as a binder using the S/S method. The initial concentration of 16 PAHs in the raw sludge was first measured before the performance of the S/S method to remediate the PAHs were evaluated. The S/S matrices were tested for leaching behavior and strength after 7 and 28 days by air curing. The leaching test was measured using the Toxicity Characteristics Leaching Procedure (TCLP), and the remaining PAHs concentration in the matrices was analyzed using a Gas Chromatography-Mass Spectrometer (GC-MS). In the raw sludge, all 16 PAHs compounds were below the standard limit except for Benzo(a)anthracene, Benzo(a)pyrene, Dibenzo(ah)anthracene, and Indeno(1,2,3- cd_ pyrene), which are considered as high rings PAHs. The high rings PAHs show lower concentration in leachate than low rings PAHs, which indicates the potential of the S/S method in remediating high rings PAHs. The high sludge ratio in S/S matrices has shown that the percentage strength is increasing, similar to Portland cement. Therefore, this study contributed to the possibility of the S/S method in the remediation of PAHs in petroleum sludge by using only Portland cement as a binder.
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Authors and Affiliations

Noor Faiza Roslee
1
ORCID: ORCID
Nor Amani Filzah Mohd Kamil
1
ORCID: ORCID
Aeslina Abdul Kadir
2
ORCID: ORCID
Abdul Rahim Jalil
3
ORCID: ORCID
Nurhidayah Hamzah
4
ORCID: ORCID
Norazian Mohamed Noor
5
ORCID: ORCID
Andrei Victor Sandu
6
ORCID: ORCID

  1. Universiti Tun Hussien Onn Malaysia, Faculty of Civil Engineering and Built Environment, Batu Pahat, Johor, Malaysia
  2. Universiti Tun Hussien Onn Malaysia, Micro Pollutant Research Centre, Batu Pahat, Johor, Malaysia
  3. Pengerang Refining Company Sdn. Bhd. 81600 Pengerang, Johor Malaysia
  4. Universiti Teknologi MARA Department of Water Resource and Environmental System, 40450, Selangor, Malaysia
  5. Universiti Malaysia Perlis (UniMAP), Faculty of Civil Engineering Technology, 01000 Perlis Malaysia
  6. "Gheorghe Asachi” Technical University, Faculty of Materials Science and Engineering, 700050 lasi, Romania
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Abstract

In this study, to investigate effects of tin addition on the microstructures and corrosion properties, Zn-1Mg-xSn (x = 1.0, 2.0 and 5.0 wt.%) ternary zinc alloys were prepared. The experimental results indicated that the Zn-1Mg-2.0 wt.% Sn alloy has the better mechanical properties compared with pure zinc and Zn-1Mg alloy. The tensile strength of the alloy material is 173.2±3.7 MPa, the yield strength is 120.7±2.4 MPa, the elongation is 5.64±0.08% and the hardness is 76.9±0.8 HV. The average degradation rate of the alloys immersion in SBF solution for 60 days is 0.16±0.03 mm/year, and the Zn-1Mg-2.0 wt.% Sn alloy hemolysis rate is only 0.81±0.02%. It is confirmed that the addition of tin is effective to improve the mechanical properties and degradation of Zn-1Mg alloy. It may be a candidate of the clinical application requirements of the degradable implant materials in orthopedics.
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Authors and Affiliations

Zhouling Long
1
ORCID: ORCID
Haiyang Lang
2
ORCID: ORCID
Jun Ou
2 3
ORCID: ORCID

  1. Materials Science and Engineering, Guilin University of Technology, China
  2. Guilin University of Technology, College of Materials Science and Engineering / Dental Clinic and Experimental Center of Medical Sciences, 12 Jianganroad, Guilin, 541004, Guilin, China
  3. Guilin Medical University, Experimental Center of Medical Sciences, 26, Huanchen Road Guilin, 541002, Guilin, China
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Abstract

Current work attempts to fabricate aluminium alloy AA2219 metal matrix composite (AMC) reinforced with natural bio-based sea shell powder (SSP) which is a ceramic material, in view of improving the mechanical and tribological properties. SSP was characterized by X-Ray Diffraction (XRD) to assess its chemical constituents and particle size. Stir casting route was adopted for fabricating AMCs reinforced with 1, 2 and 3 wt. % of SSP. Energy Dispersive X-ray Spectroscopy (EDS) was used to analyse the formation of secondary elements during casting and scanning electron microscopy (SEM) was used analyze the surface morphology of the composite specimen before and after tribological tests. Hardness, Compressive strength and tribological properties were evaluated using appropriate tests and corresponding ASTM standards. Characterization methods revealed that the formation of secondary elements was very low at 3 wt. % of SSP when compared with other compositions. Hardness and compressive strength was found to be maximum for 3 wt. % of SSP while the specific wear rate and coefficient of friction values were found to be lesser for the same composite when compared with the unreinforced alloy and were on par with the AA2219 composites containing synthetic reinforcements.
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Authors and Affiliations

V. Bhuvaneswari
1
ORCID: ORCID
L. Rajeshkumar
1
ORCID: ORCID
R. Saravanakumar
2
D. Balaji
1
ORCID: ORCID

  1. KPR Institute of Engineering and Technology, Department of Mechanical Engineering, Coimbatore – 641407, Tamilnadu, India
  2. VSB College of Engineering and Technical Campus, Department of Mechanical Engineering, Coimbatore – 642109, Tamilnadu, India
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Abstract

We build the melting theory and the theory of the Debye temperature for defective and perfect cubic metals mainly based on the statistical moment method. Our theoretical results are applied to metals Ni, Pd and Pt. Our calculations of melting temperatures agree well with experiments and other calculations. Our other calculations are highly reliable.
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Authors and Affiliations

Nguyen Quang Hoc
1
Bui Duc Tinh
1
Nguyen Duc Hien
2

  1. Hanoi National University of Education, 136 Xuan Thuy, Hanoi, Vietnam
  2. Mac Dinh Chi High School, Chu Pah district, Gia Lai province, Vietnam
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Abstract

Accordingly with the principles of the circular economy, mixed plastic wastes can be recycled also by thermoforming, getting new non-oriented fibers composite materials. This study highlights the mechanical behavior of new composite material plates containing recycled glass fibers as reinforcing element and ABS-PMMA mixture as matrix, as well as an efficient way to convert a manufacturing process wastes in a product. The mechanical behavior of new composite material plates was evidenced by tensile, flexural and compression tests. In addition a surface morphology analysis was performed.
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Authors and Affiliations

M.A. Platon
1
ORCID: ORCID
O. Nemeș
1 2
ORCID: ORCID
A.-E. Tiuc
1
ORCID: ORCID
C. Vilău
3
ORCID: ORCID
C.M. Dudescu
3
ORCID: ORCID
S. Pădurețu
4
ORCID: ORCID

  1. Technical University of Cluj-Napoca, Faculty of Materials and Environmental Engineering, 28 Memorandumului Street, 400114, Cluj-Napoca, Romania
  2. National Institute for Research and Development in Environmental Protection, 294 Blvd. Splaiul Independentei, Sector 6, 060031, Bucharest, Romania
  3. Technical University of Cluj-Napoca, Faculty of Automotive, Mechatronics and Mechanical Engineering, 28 Memorandumului Street, 400114, Cluj-Napoca, Romania
  4. Technical University of Cluj-Napoca, Faculty of Machine Building, 28 Memorandumului Street, 400114, Cluj-Napoca, Romania.
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Abstract

The Fe-based alloy with manganese led to the appearance of new austenitic alloys, with the antiferromagnetic property pursued, resulting in compatibility with the magnetic field as that of magnetic resonance imaging. The corrosion resistance behavior of the biodegradable Fe-Mn-Si alloy was analyzed in a thermostatic chamber at 37±1°C for 24, 48 and 72 hours by immersing in Ringer solution. Also, the cast and laminated samples were subjected to electro-corrosion tests using a potentiostat equipment. Linear and cyclic potentiometry is presented for characterize the corrosion behavior of the experimental samples in electrolyte. Due to the interaction between the alloy and the liquid medium a change in the solution pH was observed. Structure analysis and chemical composition details of the surfaces were obtained using electron scanning microscopy (SEM) and X-ray energy dispersive spectroscopy (EDS).
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Authors and Affiliations

A.-M. Roman
1
ORCID: ORCID
R. Chelariu
1
ORCID: ORCID
R. Cimpoesu
1
ORCID: ORCID
I. Stirbu
1
ORCID: ORCID
I. Ionita
1
ORCID: ORCID
M.M. Cazacu
2
ORCID: ORCID
B.A. Prisecariu