Soleh Wahyudi - Academia.edu (original) (raw)
Papers by Soleh Wahyudi
Electrolytic deposition is the most simplest and low-cost method for synthesis of copper powder. ... more Electrolytic deposition is the most simplest and low-cost method for synthesis of copper powder. In obtaining nano-size powder which is used for various applications such as micro-devices, magnetic materials, optical, catalysts and pigments, a pulse current electrolysis technique has been developed. In this paper, crystallization behaviour of copper powder syntesized by pulse current electrolysis is discussed. Morphology of copper powder produced by direct current (DC) electrolysis and pulse electrolysis was compared. The effects of frequency and duty cycle of the pulse on the morphology and particle size of the syntesized powder were examined. Series of DC current and pulse current electrolysis were carried out in a single compartment of electrolyic cell having a volume of 100 mL at room temperature (27 +- 1 degreesC). Sulfate-based electrolyte containing 0.01M copper concentration and 1M sulfuric acid without additives was used. The anode was a titanium metal sheet and the cathode...
![Research paper thumbnail of ANODISASI PADUAN AL 2024 T3 DENGAN METODE PULSE CURRENT DALAM LARUTAN ASAM TARTARAT-SULFAT (TSA) [A Preliminary Study of Corrosion for Ni3(Si,Ti) Intermetallic Compound With Various Temperatures in Neutral Sodium Chloride Solution]](https://attachments.academia-assets.com/94983110/thumbnails/1.jpg)
](Metalurgi, 2016
Sebagai alternatif terhadap proses anodisasi konvensional dalam larutan asam sulfat dan asam krom... more Sebagai alternatif terhadap proses anodisasi konvensional dalam larutan asam sulfat dan asam kromat, telah dikembangkan proses anodisasi dalam larutan asam tartarat-sulfat (TSA) untuk mendapatkan proses yang lebih ramah lingkungan dengan durasi yang lebih singkat dan menghasilkan morfologi lapisan anodize serta ketahanan korosi yang lebih baik pada paduan aluminium. Pada tulisan ini dipresentasikan hasil-hasil percobaan anodisasi paduan Al 2024 T3 dalam larutan asam tartarat-sulfat dengan metode pulse current dan didiskusikan pengaruh temperatur, tegangan, dan lama waktu anodisasi terhadap berat dan ketebalan lapisan anodize serta ketahanan korosi lapisan anodize. Hasil analisis variansi (ANOVA) 3 faktor menunjukkan urutan faktor yang paling berpengaruh terhadap tebal dan berat lapisan anodize setelah sealing secara berurutan adalah temperatur, tegangan sel, dan lama waktu anodisasi. Ketebalan lapisan anodize sebanding dengan rapat arus dan waktu anodisasi yang dipengaruhi oleh temperatur dan tegangan. Berdasarkan hasil response surface dan contour plot pengaruh temperatur dan tegangan terhadap rapat arus, ketebalan dan berat lapisan anodize serta jumlah pit yang terbentuk setelah uji sembur garam selama 336 jam, kondisi proses anodisasi Al 2024 T3 dengan metode pulse current yang disarankan adalah pada selang temperatur 23-30 °C dengan tegangan sel 7,3-10 V dan waktu proses selama 30 menit.
Journal of Minerals and Materials Characterization and Engineering, 2015
2024 T3 is one of aluminium alloys which are widely used in the aircraft structures. Anodizing of... more 2024 T3 is one of aluminium alloys which are widely used in the aircraft structures. Anodizing of alluminium alloy in tartaric-sulphuric acid (TSA) electrolyte is developed to obtain more environmentally-friendly process and to produce anodize layer with better corrosion resistance. In this research work, the influences of anodizing parameters of Al 2024 T3 in TSA on the thickness, weight and corrosion resistance of the anodize layer are studied. Corrosion resistance test was carried out by conducting salt spray test for 336 hours and anodic polarization measurements using potentiostat. Results of three-factor analysis of variance (ANOVA) demonstrated that the most influencing factor that determines the thickness and weight of the anodize layer is temperature, followed by applied voltage, duration of anodizing, voltage-temperature interaction, interaction of temperature-duration of anodizing, interaction of voltage-temperature-duration of anodizing, and interaction of voltage and duration of anodizing. The pit density and corrosion current density (icorr) were found to be dependent on the coating thickness. The anodize layer with a thickness of higher than 3 μm was not experienced to pitting corrosion during 336 hours of salt spray test.
JURNAL VOKASI TEKNOLOGI INDUSTRI (JVTI)
Dalam penelitian ini dipelajari tentang pengaruh rasio konsentrasi nikel sulfat (NiSO4) dengan ni... more Dalam penelitian ini dipelajari tentang pengaruh rasio konsentrasi nikel sulfat (NiSO4) dengan nikel klorida (NiCl2) serta rapat arus terhadap efisiensi arus pada sintesis serbuk nikel dengan metode elektrolisis. Proses elektrolisis serbuk nikel dilakukan dengan menggunakan nikel murni sebagai anoda dan stainless steel 316L sebagai katoda, waktu proses elektrolisis selama 5 menit dan suhu elektrolit 25꙳C. Parameter yang divariasikan adalah rasio konsentrasi NiSO4/NiCl2 dan rapat arus. Variasi rasio konsentrasi NiSO4/NiCl2 adalah NiSO4; 19:1; 9:1; 1:1 dan 1:9 dengan konsentrasi ion nikel dalam larutan dibuat tetap sebesar 1,2 M. Sedangkan variasi rapat arusnya adalah 0,5; 0,6; 0,7 dan 0,8 A/cm2. Serbuk yang mengendap di permukaan katoda di-scrapping lalu dibilas dengan aquades dan dikeringkan pada suhu 100꙳C dalam atmosfir udara. Serbuk yang dihasilkan diuji Scanning Electron Microscope (SEM) untuk mengetahui morfologi dan ukuran partikel serbuk, Energy Dispersive X-ray Spectroscopy ...
Journal of Engineering Science and Technology, 2021
This paper describes an investigation into the effects of copper concentration, current density, ... more This paper describes an investigation into the effects of copper concentration, current density, and time of electrolysis on the particle size distribution and morphology of synthesized copper powder via electrodeposition. Characterization of copper powder was performed using Particle Size Analyzer to determine the size distribution, Scanning Electron Microscope to confirm particle size and shape, and X-Ray Diffraction to determine the phase and structure of copper powder. The result shows that copper powder has a singlephase, specifically Cu with purity of 98.42%, face-centred cubic (FCC) crystal lattice, and dendritic structure with cauliflower-like and corn-like shape particles. Electrolysis experiment at a condition of 0.2 A/cm 2 current density and 0.02 M Cu concentration results in the smallest particle size comprising 0.499 μm at 3 seconds, and the size distribution resembles a normal distribution at 15 minutes.
IOP Conference Series: Materials Science and Engineering, Sep 5, 2019
In this paper, copper powder fabrication has been made via electrolysis method using CuSO4 and H2... more In this paper, copper powder fabrication has been made via electrolysis method using CuSO4 and H2SO4 in aqueous media. Electrodeposition process of copper powder on a metallic surface is done by applying to continue current and pulse current with rectangular pulse waveform. Characterization of copper powder was carried out by SEM to confirm particle size and shape and EDX to determine the copper powder composition. In electrodeposition by applying to continue current to produce the copper powder with particle shape was dendritic, and the elemental composition of the powder was Cu and O. Regarding average particle size, pulse electrodeposition process produces the copper powder with average particle size up to 0.85μm, 72.6% smaller than if apply to continue current.
Copper nanopowder demonstrates excellent conductivity, catalytic behaviour, excellent compatibili... more Copper nanopowder demonstrates excellent conductivity, catalytic behaviour, excellent compatibility and antibacterial properties. Copper nanopowder has been used as an essential component in the future nano-devices, a wide range of industrial applications and used as a replacement for more expensive metals. Copper nanopowder properties are strongly influenced by shape, size and size distribution which are often varied by varying the synthetic methods. Accordingly, this review presents different of synthetic methods of copper nanopowder and applications of this nanopowder in different fields.
Al-Kimia
Copper deposits have been obtained by the electrolysis method using copper sulfate and sulfuric a... more Copper deposits have been obtained by the electrolysis method using copper sulfate and sulfuric acid. The effect of copper concentration and current density on the surface morphology of copper deposits and current efficiency have been studied. The variation of copper concentration is 0.04 M and 0.8 M and the variation of current density is 2-8 A/dm 2. The copper deposits will be photographed macro, weighed and characterized by Scanning Electron Microscope (SEM) to determine the surface morphology of deposits and Energy-Dispersive X-ray spectroscopy (EDX) to determine the chemical composition of deposits. The surface morphology of copper deposits in the form of compact and without nodules was reached at copper concentration is 0.8 M and the current density is 2 A/dm 2 with the average of current efficiency is 96%.
Electrolytic deposition is the most simplest and low-cost method for synthesis of copper powder. ... more Electrolytic deposition is the most simplest and low-cost method for synthesis of copper powder. In obtaining nano-size powder which is used for various applications such as micro-devices, magnetic materials, optical, catalysts and pigments, a pulse current electrolysis technique has been developed. In this paper, crystallization behaviour of copper powder syntesized by pulse current electrolysis is discussed. Morphology of copper powder produced by direct current (DC) electrolysis and pulse electrolysis was compared. The effects of frequency and duty cycle of the pulse on the morphology and particle size of the syntesized powder were examined. Series of DC current and pulse current electrolysis were carried out in a single compartment of electrolyic cell having a volume of 100 mL at room temperature (27 +- 1 degreesC). Sulfate-based electrolyte containing 0.01M copper concentration and 1M sulfuric acid without additives was used. The anode was a titanium metal sheet and the cathode...
Metalurgi, 2016
Sebagai alternatif terhadap proses anodisasi konvensional dalam larutan asam sulfat dan asam krom... more Sebagai alternatif terhadap proses anodisasi konvensional dalam larutan asam sulfat dan asam kromat, telah dikembangkan proses anodisasi dalam larutan asam tartarat-sulfat (TSA) untuk mendapatkan proses yang lebih ramah lingkungan dengan durasi yang lebih singkat dan menghasilkan morfologi lapisan anodize serta ketahanan korosi yang lebih baik pada paduan aluminium. Pada tulisan ini dipresentasikan hasil-hasil percobaan anodisasi paduan Al 2024 T3 dalam larutan asam tartarat-sulfat dengan metode pulse current dan didiskusikan pengaruh temperatur, tegangan, dan lama waktu anodisasi terhadap berat dan ketebalan lapisan anodize serta ketahanan korosi lapisan anodize. Hasil analisis variansi (ANOVA) 3 faktor menunjukkan urutan faktor yang paling berpengaruh terhadap tebal dan berat lapisan anodize setelah sealing secara berurutan adalah temperatur, tegangan sel, dan lama waktu anodisasi. Ketebalan lapisan anodize sebanding dengan rapat arus dan waktu anodisasi yang dipengaruhi oleh temperatur dan tegangan. Berdasarkan hasil response surface dan contour plot pengaruh temperatur dan tegangan terhadap rapat arus, ketebalan dan berat lapisan anodize serta jumlah pit yang terbentuk setelah uji sembur garam selama 336 jam, kondisi proses anodisasi Al 2024 T3 dengan metode pulse current yang disarankan adalah pada selang temperatur 23-30 °C dengan tegangan sel 7,3-10 V dan waktu proses selama 30 menit.
Journal of Minerals and Materials Characterization and Engineering, 2015
2024 T3 is one of aluminium alloys which are widely used in the aircraft structures. Anodizing of... more 2024 T3 is one of aluminium alloys which are widely used in the aircraft structures. Anodizing of alluminium alloy in tartaric-sulphuric acid (TSA) electrolyte is developed to obtain more environmentally-friendly process and to produce anodize layer with better corrosion resistance. In this research work, the influences of anodizing parameters of Al 2024 T3 in TSA on the thickness, weight and corrosion resistance of the anodize layer are studied. Corrosion resistance test was carried out by conducting salt spray test for 336 hours and anodic polarization measurements using potentiostat. Results of three-factor analysis of variance (ANOVA) demonstrated that the most influencing factor that determines the thickness and weight of the anodize layer is temperature, followed by applied voltage, duration of anodizing, voltage-temperature interaction, interaction of temperature-duration of anodizing, interaction of voltage-temperature-duration of anodizing, and interaction of voltage and duration of anodizing. The pit density and corrosion current density (icorr) were found to be dependent on the coating thickness. The anodize layer with a thickness of higher than 3 μm was not experienced to pitting corrosion during 336 hours of salt spray test.
JURNAL VOKASI TEKNOLOGI INDUSTRI (JVTI)
Dalam penelitian ini dipelajari tentang pengaruh rasio konsentrasi nikel sulfat (NiSO4) dengan ni... more Dalam penelitian ini dipelajari tentang pengaruh rasio konsentrasi nikel sulfat (NiSO4) dengan nikel klorida (NiCl2) serta rapat arus terhadap efisiensi arus pada sintesis serbuk nikel dengan metode elektrolisis. Proses elektrolisis serbuk nikel dilakukan dengan menggunakan nikel murni sebagai anoda dan stainless steel 316L sebagai katoda, waktu proses elektrolisis selama 5 menit dan suhu elektrolit 25꙳C. Parameter yang divariasikan adalah rasio konsentrasi NiSO4/NiCl2 dan rapat arus. Variasi rasio konsentrasi NiSO4/NiCl2 adalah NiSO4; 19:1; 9:1; 1:1 dan 1:9 dengan konsentrasi ion nikel dalam larutan dibuat tetap sebesar 1,2 M. Sedangkan variasi rapat arusnya adalah 0,5; 0,6; 0,7 dan 0,8 A/cm2. Serbuk yang mengendap di permukaan katoda di-scrapping lalu dibilas dengan aquades dan dikeringkan pada suhu 100꙳C dalam atmosfir udara. Serbuk yang dihasilkan diuji Scanning Electron Microscope (SEM) untuk mengetahui morfologi dan ukuran partikel serbuk, Energy Dispersive X-ray Spectroscopy ...
Journal of Engineering Science and Technology, 2021
This paper describes an investigation into the effects of copper concentration, current density, ... more This paper describes an investigation into the effects of copper concentration, current density, and time of electrolysis on the particle size distribution and morphology of synthesized copper powder via electrodeposition. Characterization of copper powder was performed using Particle Size Analyzer to determine the size distribution, Scanning Electron Microscope to confirm particle size and shape, and X-Ray Diffraction to determine the phase and structure of copper powder. The result shows that copper powder has a singlephase, specifically Cu with purity of 98.42%, face-centred cubic (FCC) crystal lattice, and dendritic structure with cauliflower-like and corn-like shape particles. Electrolysis experiment at a condition of 0.2 A/cm 2 current density and 0.02 M Cu concentration results in the smallest particle size comprising 0.499 μm at 3 seconds, and the size distribution resembles a normal distribution at 15 minutes.
IOP Conference Series: Materials Science and Engineering, Sep 5, 2019
In this paper, copper powder fabrication has been made via electrolysis method using CuSO4 and H2... more In this paper, copper powder fabrication has been made via electrolysis method using CuSO4 and H2SO4 in aqueous media. Electrodeposition process of copper powder on a metallic surface is done by applying to continue current and pulse current with rectangular pulse waveform. Characterization of copper powder was carried out by SEM to confirm particle size and shape and EDX to determine the copper powder composition. In electrodeposition by applying to continue current to produce the copper powder with particle shape was dendritic, and the elemental composition of the powder was Cu and O. Regarding average particle size, pulse electrodeposition process produces the copper powder with average particle size up to 0.85μm, 72.6% smaller than if apply to continue current.
Copper nanopowder demonstrates excellent conductivity, catalytic behaviour, excellent compatibili... more Copper nanopowder demonstrates excellent conductivity, catalytic behaviour, excellent compatibility and antibacterial properties. Copper nanopowder has been used as an essential component in the future nano-devices, a wide range of industrial applications and used as a replacement for more expensive metals. Copper nanopowder properties are strongly influenced by shape, size and size distribution which are often varied by varying the synthetic methods. Accordingly, this review presents different of synthetic methods of copper nanopowder and applications of this nanopowder in different fields.
Al-Kimia
Copper deposits have been obtained by the electrolysis method using copper sulfate and sulfuric a... more Copper deposits have been obtained by the electrolysis method using copper sulfate and sulfuric acid. The effect of copper concentration and current density on the surface morphology of copper deposits and current efficiency have been studied. The variation of copper concentration is 0.04 M and 0.8 M and the variation of current density is 2-8 A/dm 2. The copper deposits will be photographed macro, weighed and characterized by Scanning Electron Microscope (SEM) to determine the surface morphology of deposits and Energy-Dispersive X-ray spectroscopy (EDX) to determine the chemical composition of deposits. The surface morphology of copper deposits in the form of compact and without nodules was reached at copper concentration is 0.8 M and the current density is 2 A/dm 2 with the average of current efficiency is 96%.