TY - CONF A1 - Triwikantoro, Triwikantoro A1 - Bäßler, Ralph A1 - Munasir, A1 - Zainuri, Mochammad A1 - Darminto, T1 - Corrosion behavior of PANI/SiO2 composite in synthetic geothermal atmosphere T2 - 6th Nanoscience and Nanotechnlogy Symposium CY - Surakarta, Indonesia DA - 04.11.2015 PY - 2015 AN - OPUS4-34847 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Munasir, A1 - Triwikantoro, A1 - Zainuri, M. A1 - Bäßler, Ralph A1 - Darminto, T1 - Mechanical Strength and Corrosion Rate of Aluminium Composites (Al/SiO2): Nanoparticle Silica (NPS) as Reinforcement N2 - The fabrication and characteristics of amorphous silica reinforced Al matrix composites are studied in this paper. The major starting materials were commercial Al powder and extracted nanoparticle SiO2 (NPS) powder from Indonesian silica sands. Two different active solutions,namely N-butanol and tetramethylammonium hydroxide (TMAH), were introduced during synthesis. Characterisations in terms of physical, mechanical, microstructural and corrosion rate examinations were also employed. Introducing the SiO2 nanoparticles into the Al matrix has decreased the density and increased the porosity of the composites. The addition of N-butanol into Al/SiO2(Al/SiO2(B)) led to broader and lower X-ray diffraction profiles than the addition of TMAH (Al/SiO2(T)). From the microstructural analysis, we found that the SiO2 particles enter and agglomerate into the opening gap of the Al sheets. Furthermore, yield strength, ultimate compression strength and modulus of elasticity tended to reduce the addition of SiO2. The corrosion rate of Al/SiO2(T) was lower than that of Al/SiO2(B) composites. KW - Aluminium KW - Silica KW - Al/SiO2 composite KW - Mechanical strength KW - Corrosion rate PY - 2019 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-487185 DO - https://doi.org/10.21315/jps2019.30.1.7 SN - 1675-3402 SN - 2180-4230 VL - 30 IS - 1 SP - 81 EP - 97 PB - USM Press CY - Pulau Pinang, Malaysia AN - OPUS4-48718 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Munasir, A1 - Triwikantoro, A1 - Zainuri, M. A1 - Bäßler, Ralph A1 - Darminto, T1 - Corrosion Polarization Behavior of Al-SiO2 Composites in 1M NaCl and Related Microstructural Analysis N2 - The composites combining aluminum and silica nanoparticles with the addition of tetramethylammonium hydroxide (Al-SiO2(T)) and butanol (Al-SiO2(B)) as mixing media have been successfully fabricated. Corrosion behavior of Al-SiO2 composites before and after exposure in 1M NaCl solution was examined using potentiodynamic polarization (Tafel curve analysis). The study was also equipped with scanning electron microscopy (SEM), energy dispersive X-ray (EDX), and X-ray diffraction (XRD) investigations. Before exposure, Al-SiO2(T) exhibited the best corrosion resistance. Performance improvement was indicated by Al-SiO2(B) up to 10 times better than Al-SiO2(T) after exposure. The increased SiO2 content did not significantly enhance the corrosion resistance of the composites. The Al-SiO2 composites with 5% SiO2 content showed very high corrosion resistance (as the optimum composition). Furthermore, pitting corrosion was observed in the Al-SiO2 composites, indicated by the formation of corrosion products at grain boundaries. The product was affected by the presence of SiO2 in the Al matrix and the NaCl environment at 90 °C (approach to synthetic geothermal media: Na+, Cl, H+, OH-). Our study revealed the presence of γ-Al2O3, γ-Al(OH)3, and Al(OH)2Cl as the dominant corrosion products. KW - Al-Composite KW - Corrosion KW - Corrosion rate KW - SiO2 Nanoparticle KW - Tafel Plot PY - 2019 DO - https://doi.org/10.5829/ije.2019.32.07a.11 SN - 1025-2495 SN - 1735-9244 VL - 7 IS - 32 SP - 982 EP - 990 PB - Materials and Energy Research Center AN - OPUS4-48742 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Triwikantoro, A1 - Bäßler, Ralph A1 - Aristia, Gabriela A1 - Putry, A. L. A1 - Santoso, E. T1 - The corrosion of PANI/SiO2 composite in synthetic geothermal atmosphere N2 - An extraction of silica from natural sands of Bancar has been conducted by means of alkali fusion route using NaOH and mechanical alloying using planetary ball milling. The PANI/SiO2 Composite system has been coated in steel surfaces using spraying method. This study was designed to obtain PANI/SiO2 as an anti-corrosion coating material. The filler materials in the composite System consist of micro- and nano-SiO2. The structure of synthesized SiO2 be characterized using XRD and TEM. Corrosion of PANI/SiO2 composite has been tested using immersion method in synthetic geothermal atmosphere (Nord Deutsche Becken/NDB solution). The surface morphology after corrosion was observed by using SEM/EDX. XRD-Patterns and TEM show that the size of produced SiO2 is micro and nano. The size and composition of filler have influenced to surface degradation in geothermal atmosphere significantly. The addition of nano-SiO2 in the PANI matrix influenced corrosion resistance better than micro-SiO2 filler qualitatively. The nano-SiO2 has a high potential as an anti-corrosion material in geothermal atmosphere. The product of corrosion is mainly Fe2O3 and the corrosion process is identified as a pitting corrosion. T2 - The 7th Nanoscience and Nanotechnology Symposium CY - Bandung, Indonesia DA - 22.10.2017 KW - Composite KW - PANi/SiO2 KW - Anti-Corrosion PY - 2017 AN - OPUS4-43275 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -