Coatings Research Articles

Comparative performance and emission characteristics of peanut seed oil methyl ester (PSME) on a thermal isolated diesel engine

In this research, cylinder liners of a diesel engine were coated with a 150 μm thick Fe2B layer using boronizing method. The upper surface of the piston was coated with a 300 μm thick CoNiCrAlYttra + NiCrBSi layer by using plasma spraying method. D-2, biodiesel (PSME-100) and blend (PSME-50) were used as test fuels. PSME fuel was produced through alkali catalyzed transesterification method. As-prepared fuels were used separately in coated (CE) and standard engines (SE) to compare performance and exhaust emission of both engines. In order to see the isolation effect of Fe2B layer, 3-D finite element transient-state analyses were carried out. According to the results, brake thermal efficiency (BTE) and exhaust gas temperature (EGT) of coated engine were considerably enhanced while brake specific fuel consumption (BSFC), CO, HC and smoke emission were decreased compared to those of standard engine. However, NOx emission of CE was higher than that of uncoated one, which was attributed to high combustion temperature and long combustion process in CE. These results were further confirmed with finite element simulation. The decreasing BSFC and increasing BTE for coated engine has been attributed to the elevated temperature of the combustion chamber by the effect of thermal insulation.

СТРУКТУРА ИНТЕРМЕТАЛЛИДНЫХ ПОКРЫТИЙ ПОСЛЕ ТЕРМОЦИКЛИРОВАНИЯ

СТРУКТУРА ИНТЕРМЕТАЛЛИДНЫХ ПОКРЫТИЙ ПОСЛЕ ТЕРМОЦИКЛИРОВАНИЯ

Designing and Developing Rechargeable Aluminium-Ion Battery using Graphite Coated Activated Charcoal Corncob as Cathode Material

One of the renewable energy storage systems that can be used today is the aluminum ion battery. In this study, aluminum foil was used as anode, polyetylene polyprophylene (PE/PP) as separator, electrolyte from AlCl3/[EMIm]Cl and graphite coated corncob, an activated charcoal, as cathode. Coating method of cathode materials was done by mixing both graphite and activated charcoal with varied composition 1:0.5, 1:1, 1:1.5, and 1:3. The coating process began by mixing the graphite and corncob with ethanol as a solvent for six hours, then heating in an oven at 80 °C for three days, gradual drying in a furnace at 350 °C for five hours and sintering at 600 °C for six hours. From this research, SEM results showed that carbon particles were evenly distributed, with spherical particles. The spherical shape was the main requirement of carbon formation in order to produce high energy. Based on the results, battery potential was 2.54 V with average of optimal capacity at a ratio of graphite and corncob activated charcoal 1:1.5 was 83.067 mAh/g. The highest efficiency was also at a ratio of 1:1.5 of 97.20%, because at this ratio, there was an increasing in percentage of element C 91.74%, greater than the percentage of element C on the other three cathode samples.Salah satu sistem penyimpan energi terbarukan yang bisa digunakan saat ini adalah baterai ion aluminium. Pada penelitian ini digunakan aluminium foil sebagai anoda, polyetylene polyprophylene (PE/PP) sebagai separator, elektrolit menggunakan AlCl3/[EMIm]Cl dan grafit terlapisi arang aktif tongkol jagung sebagai bahan katoda. Metode pelapisan bahan katoda dilakukan dengan mencampurkan grafit dan arang aktif dengan variasi komposisi 1:0,5, 1:1,1:1,5 dan 1:3. Proses pelapisan diawali dengan pencampuran grafit dan arang aktif tongkol jagung dengan ethanol sebagai pelarut selama enam jam kemudian pemanasan di oven pada suhu 80oC selama tiga hari, pengeringan bertahap di furnace pada suhu 350oC selama lima jam dan sintering pada suhu 600oC selama enam jam. Dari penelitian ini didapatkan hasil SEM menunjukkan bahwa partikel karbon terdistribusi merata, dengan bentuk partikel bulat (sphare).Sampelberbentuk bulat atau sphere merupakan syarat utama pembentukan karbon supaya dapat menghasilkan energi tinggi. Berdasarkan hasil uji baterai diperoleh potensial sebesar 2,54 Volt dengan rata-rata kapasitas optimal terjadi pada rasio grafit dan arang aktif tongkol jagung 1:1,5 sebesar 83,067 mAh/g. Efisiensi tertinggi juga terjadi pada rasio 1:1,5 sebesar 97,20%. Hal ini karena pada rasio 1:1,5 terjadi peningkatan persentase unsur C yakni 91.74% lebih besar dari persentase unsur C pada tiga sampel katoda yang lainnya.

Directional Electrodeposition of Micro-nano Superhyd-rophobic Coating on 316L Stainless Steel

Directional Electrodeposition of Micro-nano Superhyd-rophobic Coating on 316L Stainless Steel

Анализ структурного состояния поверхностного слоя после электроэрозионного легирования. II. Особенности формирования электроэрозионных покрытий на специальных сталях и сплавах твёрдыми износостойкими и мягкими антифрикционными материалами

Анализ структурного состояния поверхностного слоя после электроэрозионного легирования. II. Особенности формирования электроэрозионных покрытий на специальных сталях и сплавах твёрдыми износостойкими и мягкими антифрикционными материалами

PPG plans to construct state-of-the-art paint & coatings R&D centre

PPG plans to construct state-of-the-art paint & coatings R&D centre

생체온도에서 전기화학증착법을 이용한 티타늄 상 수산화인회석 코팅 연구

본 연구에서는 생체 온도에서 전기화학적 증착(Electrochemical deposition;ECD) 방법을 이용하여 티타늄 상에 수산화인회석(Hydroxyapatite; HAp)을 코팅하는 방법을 연구하였다. 5M NaOH 용액을 이용하여 에칭 처리된 티타늄 디스크 시편들이 ECD를 위하여 사용되었다. 5 mM Ca(NO₃)₂와 2 mM NH₄H₂PO₄을 혼합하여 제조한 pH 5(E2)인 전해질을 pH 3(E1)과 pH 6(E3)으로 각각 조정하여 세 종류의 전해질을 준비하였다. 티타늄 시편에 –10, -15, -30 mA의 다른 전류를 갖는 펄스를 인가하였으며, 전해질의 온도는 37℃로 유지하였다. 이와 같이 E1-10, E1-15, E1-30, E2-10, E2-15, E2-30, E3-10, E3-15, E3-30 시편군을 준비하였다. 제조된 각 시편들의 표면 형상을 관찰한 결과, pH가 3이고 15 mA의 낮은 전류 하에서는 코팅이 이루어지지 않았으며, E3-15과 E3-30 시편에서는 분말형태의 코팅막이 형성되었다. pH가 3과 5이고 30 mA의 높은 전류가 인가된 E1-30과 E2-30 시편에서는 겔 형태의 화합물이 증착되어 건조 후 갈라짐이 발생하였다. E2-10, E2-15, E3-10 시편군들에서 균일하고 안정된 형태의 코팅막이 형성되었으며, 결정구조 분석을 통하여 HAp가 코팅된 것을 확인하였다. 특히 E2-10 시편이 다른 시편들에 비하여 c-축 방향으로 정렬되어 HAp가 시편 표면에 잘 증착되었다.

Combination of alginate based edible coating-betel essential oil in extending the shelf life of rose apple cv. Dalhari (Syzygium samarangense)

Rose apple cv. Dalhari is a local fruit grown in Berbah District, Special Region of Yogyakarta. This fruit perishable easily loses its water content and is attacked by microbes. This research aimed to determine the best combination between alginate and betel essential oil to inhibit the growth of microbes and maintain quality of rose apple cv. Dalhari. Alginate and betel essential oil treatments were used at three concentration levels, alone and in combinations, respectively of 2%, 2.5%, 3% and 0%, 0.1%, 0.2%. The results showed that combination treatment of 2.5% alginate and 0.1% betel essential oil was the most effective to maintain the fruit quality. The sole addition of betel essential oil was not able to inhibit microbial growth. Furthermore, combination of alginate based edible coating and betel essential oil was able to maintain the quality of rose apple cv. Dalhari up to nine days.

Properties of Corrosive Coated Coatings Multi-Groove Hardfacing on Stainless Steel

Properties of Corrosive Coated Coatings Multi-Groove Hardfacing on Stainless Steel

Electrically Switchable Nan Crystals-in-Glass Coatings That Dynamically Filter Heat and Light

Electrically Switchable Nan Crystals-in-Glass Coatings That Dynamically Filter Heat and Light

Protective Performance of a Novel Silicone Coating ES150 Modified with Nano-particulate of Metal for AZ91D Mg-alloy

Protective Performance of a Novel Silicone Coating ES150 Modified with Nano-particulate of Metal for AZ91D Mg-alloy

Comparative Study of Hot Corrosion Behavior of theEnamel Based Composite Coatings and the ArcIon Plating NiCrAlY on TiAl Alloy

Comparative Study of Hot Corrosion Behavior of theEnamel Based Composite Coatings and the ArcIon Plating NiCrAlY on TiAl Alloy

Fabrication and Properties of Super-hydrophobic Composite Coatings

Fabrication and Properties of Super-hydrophobic Composite Coatings

Effect of Preheating Time on Protective Performance of Fusion Bonded Epoxy Powder Coating on Q345 Steel II: Failure Behavior Analysis of Coating

Effect of Preheating Time on Protective Performance of Fusion Bonded Epoxy Powder Coating on Q345 Steel II: Failure Behavior Analysis of Coating

New Home for the British Coatings Federation Officially Open for Business

New Home for the British Coatings Federation Officially Open for Business

Protection Mechanism Study of Enamel-Based Composite Coatings Under the Simulated Combusting Gas Shock

Protection Mechanism Study of Enamel-Based Composite Coatings Under the Simulated Combusting Gas Shock

Anticorrosion Coatings Obtained by Plasma Electrolytic Oxidation on Implant Metals and Alloys

Anticorrosion Coatings Obtained by Plasma Electrolytic Oxidation on Implant Metals and Alloys

Failure of coatings over joints and gaps

Failure of coatings over joints and gaps

EPD Coatings Market exhibit growth over 4.6 % by 2025

EPD Coatings Market exhibit growth over 4.6 % by 2025

Design and Preparation of Non-quarter-wave SiO2/TiO2 Double-layer Antireflective Coating†

Design and Preparation of Non-quarter-wave SiO2/TiO2 Double-layer Antireflective Coating†